~700 AU

A. R. Gibbs

~800 AU

C/O Sir

C/2008 T2 (Cardinal), is a non-periodic comet. It was discovered by Rob. D. Cardinal from the University of Calgary. It was visible as a telescopic and binocular object during 2009. It passed near the Perseus star clusters NGC 1528 on March 15 and NGC 1545 on March 17, 2009. It also passed near the Auriga star clusters M38 on April 14, M36 on April 17, and M37 in on April 21, 2009, and passed near Comet Lulin on May 12, 2009, for observers on Earth.

C/S (TV channel)

C/2006 M4 is one of several SWAN comets; the others are C/2002 O6, C/2004 H6, C/2004 V13, C/2005 P3, P/2005 T4, C/2009 F6, C/2011 Q4 and C/2012 E2.Comet C/2006 M4 (SWAN) is a non-periodic comet discovered in late June 2006 by Robert D. Matson of Irvine, California and Michael Mattiazzo of Adelaide, South Australia in publicly available images of the Solar and Heliospheric Observatory (SOHO). These images were captured by the Solar Wind ANisotropies (SWAN) Lyman-alpha all-sky camera on board the SOHO. The comet was officially announced after a ground-based confirmation by Robert McNaught (Siding Spring Survey) on July 12.Although perihelion was Sept 28, 2006, the comet flared dramatically from seventh magnitude to fourth magnitude on October 24, 2006, becoming visible with the naked eye.Comet C/2006 M4 is in a hyperbolic trajectory (with an osculating eccentricity larger than 1) during its passage through the inner solar system. After leaving the influence of the planets, the eccentricity will drop below 1 and it will remain bound to the Solar System as an Oort cloud comet.Given the extreme orbital eccentricity of this object, different epochs can generate quite different heliocentric unperturbed two-body best-fit solutions to the aphelion distance (maximum distance) of this object. For objects at such high eccentricity, the Suns barycentric coordinates are more stable than heliocentric coordinates. Using JPL Horizons, the barycentric orbital elements for epoch 2013-May-14 generate a semi-major axis of about 1300 AU and a period of about 47,000 years.

C/1992 J1 is a comet that was discovered 1 May 1992 by David Rabinowitz of the Spacewatch Project. This was the first comet to be discovered using an automated system.Using a generic heliocentric (two-body) solution calculated near the time of perihelion (closest approach to the Sun), it is estimated to have an aphelion (Q) (furthest distance from the Sun) of 154,202 AU (more than 2 Light-years). But the orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. After leaving the planetary region of the Solar System, the post-perihelion orbital period is estimated to be about 78,000 years with aphelion around 3,650 AU. In 2007 it became more than 30 AU from the Sun.

An artist's concept of C/NOFS

John Vermette

C/2008 T2 (Cardinal)

C/2007 F1 Loneos

Cristóvão Jacques

N/A

C/EBPζ

Comet Coggia, 1874 III, 1874c

C/2013 UQ4

C/P-95

C/Z Records

Comet C/2006 VZ13 (LINEAR) (also written C/2006 VZ13), is a non-periodic comet discovered November 13, 2006 by the LINEAR.The object was initially believed to be a minor planet due to its stellar appearance in the early images. However, observers soon detected a small coma and the telltale green cometary cast.The comet peaked at approximately magnitude +7.5, much brighter than predicted. The comet made Earth approach on July 14, 2007 at a distance of 0.575 AU.

C/2016 U1 (NEOWISE)

C/C++ Users Journal was a computer magazine published by CMP Media LLC in the United States. The magazine concentrated on the C++ programming language and was one of the last printed magazines to cover the topic (apart from ACCU's journals, which continue as printed magazines).The magazine started as a 16-page quarterly newsletter named BDS C Users' Group, and its target was users of Leor Zolman's BDS C compiler. Robert Ward was the volunteer coordinator of the C Users Group, which had some 150 members. The first issue of BDS C Users's Group was published on June 15, 1981. In December 1982, the name was changed to C User's Group Newsletter.In 1984 David Fiedler started another journal, The C Journal. In 1987/1988, the C User's Group Newsletter and The C Journal merged into one journal named C Users Journal. It was published eight times a year, and it had 6800 subscribers and 3000 newsstand readers.In July 1994, the name was changed to C/C++ Users Journal.In November 2001, the C/C++ Users Journal celebrated its 20th anniversary. It was published monthly at the time, had more than 43,000 readers worldwide, and contained a bimonthly Java supplement called "Java Solutions".The magazine was discontinued in 2006 with the February issue carrying a cover letter from CMP Media informing readers that no subsequent issues would be published. The publishers offered to refund remaining subscriptions or to roll them over to another magazine, Dr. Dobb's Journal. The cover letter stated that Dr Dobb's Journal would now "feature expanded C and C++ coverage". In 2009, Dr Dobb's Journal was itself discontinued as a standalone publication and merged with InformationWeek magazine.Past articles and source code archives for C/C++ Users Journal are still available through the Dr Dobb's Journal website.

C/S (standing for Crime/Suspense, originally used as an on-air brand) was used for several Filipino entertainment channels owned by the Solar Entertainment Corporation through Solar TV Network. It showed mostly American crime and suspense dramas, mysteries, reality, science fiction and action shows.

C/1807 R1 (also known as the Great Comet of 1807) is a long-period comet, which in 1807 was visible to naked-eye observers in the northern hemisphere from early September to late December. On the basis of its outstanding brightness it is called a great comet.

C/2009 R1, one of more than fifty comets known as Comet McNaught, is a non-periodic comet discovered by British-Australian astronomer Robert H. McNaught on September 9, 2009, using the Uppsala Southern Schmidt Telescope at Siding Spring Observatory in New South Wales, Australia. The discovery was confirmed the same day at the Optical Ground Station telescope at Tenerife. After the discovery, earlier images of the comet were found from July 20, August 1, and August 18, 2009.

unknown

eccentricty

C/1702 H1 (also known as "the comet of 1702") is a comet discovered by Francesco Bianchini and Giacomo Filippo Maraldi (Rome, Italy) on April 20, 1702.

Comet C/2015 F3 (SWAN) was discovered in March 2015 by Rob Matson, Vladimir Bezugly and Michael Matiazzo in near real time images taken by the SWAN instrument aboard the SOHO spacecraft. At discovery the comet was already shining at around 10th magnitude as it was already near perihelion . Orbital studies revealed C/2015 F3 to be a related fragment to long periodic comets C/1988 A1 (Liller) and C/1996 Q1 (Tabur), which were already thought to have broken off each other at a previous perihelion passage. As of May 2015, Comet SWAN was fading rapidly, as both C/1988 A1 and C/1996 Q1 ultimately did. .

C/2014 Q3 (Borisov) is a periodic comet discovered at apparent magnitude 17 on 22 August 2014 by Gennady Borisov using a 0.3-meter (12 in) Astrograph. It is the third comet discovered by Borisov. The comet is best viewed from the northern hemisphere.The comet was expected to reach about magnitude ~11 near perihelion (closest approach to the Sun), but brightened to around magnitude 10. By 8 November 2014, the comet had a declination of +83 and was circumpolar from the northern hemisphere. The comet came to perihelion on 19 November 2014 at a distance of 1.65 AU from the Sun.Before entering the planetary region (epoch 1950), C/2014 Q3 had an orbital period of 148 years. After leaving the planetary region (epoch 2050), it has an orbital period of 146 years.

Right Here. Right Now

Hyperbolic trajectory— Oort cloud comet

C/O Sir ("Care of Sir") is a 2013 Indian Bengali romantic thriller film directed by Kaushik Ganguly and produced by Jaspreet Kaur. The film tells story of a blind school teacher's life and his struggle to prevent the school being sold. The lead character is played by Saswata Chatterjee.

C/2006 M4 (SWAN)

C/2000 W1 (Utsunomiya-Jones) is a long-period comet discovered on November 18, 2000, by Syogo Utsunomiya and Albert F. A. L. Jones.The comet has an observation arc of 58 days allowing a reasonable estimate of the orbit. But the near-parabolic trajectory with an osculating perihelion eccentricity of 0.9999996 generates an extreme unperturbed aphelion distance of 2,034,048 AU (32 light-years).

April 2007

C/2015 G2 (MASTER) is a comet discovered April 7, 2015 by MASTER, the Mobile Astronomical System of the Telescope-Robots at the South African Astronomical Observatory (SAAO). It was the first comet discovered from South Africa in 35 years.Discovery was confirmed April 10, 2015 by the Minor Planet Center. It was at magnitude 10.7 at discovery and by mid-May it had reached magnitude 6.0.

C/1996 B2 (Hyakutake)

C/66 B1

C/2007 W1 (Boattini) is a long-period comet discovered on 20 November 2007, by Andrea Boattini at the Mt. Lemmon Survey. At the peak the comet had an apparent magnitude around 5.On 3 April 2008, when C/2007 W1 was 0.66AU from the Earth and 1.7AU from the Sun, the coma (expanding tenuous dust atmosphere) of the comet was estimated to be as large as 10 arcminutes.

C/1652 Y1 was a naked-eye comet observed, among others by Jan van Riebeeck. First spotted on December 16, 1652, by Dutch observers at Pernambuco (Brazil).As of June 2008 the comet was about 280 AU from the Sun (very approximate due to poorly determined orbit).

C/C++ Users Journal was a computer magazine published by CMP Media LLC in the United States. The magazine concentrated on the C++ programming language and was one of the last printed magazines to cover the topic (apart from ACCU's journals, which continue as printed magazines).The magazine started as a 16-page quarterly newsletter named BDS C Users' Group, and its target was users of Leor Zolman's BDS C compiler.

C/52 infantry

MAVEN and Comet Siding-Spring encountering Mars.webm
MAVEN and Comet Siding-Spring encountering Mars fixed cam.webm

C/2008 T2 Cardinal

C/S

C/2001 OG108 (LONEOS)

C/PDLC

C/2012 S4 (PANSTARRS)

C/2006 A1 Pojmański

C/2011 L4 (PANSTARRS) is a non-periodic comet discovered in June 2011 that became visible to the naked eye when it was near perihelion in March 2013. It was discovered using the Pan-STARRS telescope located near the summit of Haleakalā, on the island of Maui in Hawaii. Comet C/2011 L4 probably took millions of years to come from the Oort cloud. After leaving the planetary region of the Solar System, the post-perihelion orbital period (epoch 2050) is estimated to be roughly 106000 years.

MAVEN and Comet Siding Spring encountering Mars – fixed-camera view.

C/2014 G3 is a faint comet discovered on 10 April 2014 by Pan-STARRS which will pass near Jupiter's gravitational field on 8 March 2016 at distance of 0.76 AU (114,000,000 km; 71,000,000 mi). The comet had about a 405-year orbital period before entering the planetary region of the Solar System. The comet will only brighten to around apparent magnitude 18 in 2015, and will require a large amateur telescope with a CCD camera to be detected.

C/2009 R1, one of more than fifty comets known as Comet McNaught, is a non-periodic comet discovered by British-Australian astronomer Robert H. McNaught on September 9, 2009, using the Uppsala Southern Schmidt Telescope at Siding Spring Observatory in New South Wales, Australia. The discovery was confirmed the same day at the Optical Ground Station telescope at Tenerife. After the discovery, earlier images of the comet were found from July 20, August 1, and August 18, 2009. It is believed C/2009 R1 will leave the Solar System permanently.

Catalina Sky Survey 1.5-m reflector

c/o Segemyhr

C/52d infantry regiment

M. E. Van Ness

C/NOFS

C/2011 J2 (LINEAR) is an Oort cloud comet discovered on 4 May 2011 by LINEAR at an apparent magnitude of 19.7 using a 1-meter (39 in) Reflecting telescope. As of September 2014 the comet is around apparent magnitude 17.C/2011 J2 came to perihelion (closest approach to the Sun) on 25 December 2013 at a distance of 3.4 AU from the Sun. On 27 August 2014 an 18th magnitude fragment CK11J02b was detected. Preliminary estimates are that a fragmentation event occurred around 14 July 2014 plus/minus ten days. In mid-July 2014 the comet was 3.9 AU from the Sun.Fragment C was detected in October 2014 by Ernesto Guido, Nick Howes, and Martino Nicolini.C/2011 J2 is dynamically new. It came from the Oort cloud with a loosely bound chaotic orbit that was easily perturbed by galactic tides and passing stars. Before entering the planetary region (epoch 1950), C/2011 J2 had an orbital period of several million years. After leaving the planetary region (epoch 2050), it will be on an ejection trajectory.

C/2002 V1 (NEAT)

C/2015 ER61

Unknown

The great comet of 1881, chromolithograph by Trouvelot

C/o foothpath

C/2013 UQ4 (Catalina)

C/1577 VI

C/W Productions

C/1911 O1 (Brooks), also designated 1911 V or Comet Brooks, was a bright comet discovered in July 1911 by astronomer William Robert Brooks.It is notable for becoming a bright naked-eye object of second magnitude, with a narrow straight tail of up to thirty degrees in length and a distinct blue colour; this colour seen in some comets is usually a result of the emission of carbon monoxide ions.

C/2015 F3 (SWAN)

Dekchi Setai

C/1881 K1, 1881 III, 1881b, Great Comet of 1881, Comet Tebbutt

Comet C/2015 F5 (SWAN-XingMing) was discovered on March 29, 2015 in near real time SWAN images of the SOHO spacecraft, by Szymon Liwo and Worachate Boonplod. It was also independently discovered on April 4, 2015 by Guoyou Sun and Gao Xing at the XingMing observatory near Ürümqi, China. At discovery, the comet had just passed perihelion and was only 0,35 AU from the Sun, shining at about +10 mag. As of May 2015 the comet had faded below mag +13.

Bodhaditya Banerjee

several million years inbound

C/D box small nucleolar RNA SNORD113/SNORD114 family

C/1890 V1 (Zona) is a non-periodic comet discovered on 15 November 1890 by the Italian astronomer Temistocle Zona with an equatorially mounted, Merz telescope at the Osservatorio Astronomico di Palermo. Whilst attempting to observe this comet, Spitaler discovered the eponymous 113P/Spitaler in 1890.

Mt. Lemmon Survey

C/C++ User's Journal

C/S Salamis Glory

C/2006 A1 Pojmanski

C/2015 F5 (SWAN-XingMing)

C/2016 U1 NEOWISE

The Great Comet of 1760 (C/1760 A1) was first seen on 7 January 1760 by Abbe Chevalier at Lisbon. Charles Messier also spotted the comet on 8 January 1760 in Paris, by the sword of Orion. The comet was his third discovery and the comet was the 51st to have a calculated orbit. Messier observed the comet for a total of 6 days.It approached the Earth to within approximately 0.0682 astronomical unit (AU) or 6.34 million miles. This is the 17th closest approach by a comet of all time. Messier gave the comet a magnitude rating of 2.0, making it easily visible to the unaided eye. Messier also gave the comet an elongation angle of 140 degrees.Messier came up against opposition from Navy astronomer Joseph Nicholas Delisle, who had employed Messier from October 1751, because Delisle would not publish the discovery Messier had made. This was a continuation of the mistrust that had developed between Messier and Delisle because Delisle had been slow to publish work done by Messier in 1759; Messier had independently rediscovered Halley's Comet on 21 January 1759 but because Messier had doubted the correctness of Delisle's path, Delisle instructed Messier to continue observing the comet and refused to announce his discovery. Delisle apparently later changed his mind and announced the discovery on 1 April 1759, but other French astronomers discredited Delisle's claim, labelling the discovery an April Fools' joke. Delisle retired in 1760.As of June 2008, the comet was about 216 AU from the Sun.

Comet Siding Spring encounter

C/2013 UQ4 (Catalina) is a Solar System comet that came close to the Earth on July 10, 2014, at a distance of 0.314 AU (47,000,000 km; 29,200,000 mi).

C/2002 V1, 2002 V1, Comet NEAT

C/2014 G3 is a faint comet discovered on 10 April 2014 by Pan-STARRS which will pass near Jupiter's gravitational field on 8 March 2016 at distance of 0.76 AU (114,000,000 km; 71,000,000 mi). The comet had about a 405-year orbital period before entering the planetary region of the Solar System. The comet will only brighten to around apparent magnitude 18 in 2015, and will require a large amateur telescope with a CCD camera to be detected. After this passage the comet will have a 391-year orbital period.

C/2006 VZ13 (LINEAR)

C/2013 V5 (Oukaimeden) is a retrograde Oort cloud comet discovered on 12 November 2013 by Oukaimeden Observatory at an apparent magnitude of 19.4 using a 0.5-meter (20 in) reflecting telescope.From 5 May 2014 until 18 July 2014 it had an elongation less than 30 degrees from the Sun. By late August 2014 it had brighten to apparent magnitude 8 making it a small telescope and high-end binoculars target for experienced observers.

C/2007 E2 (Lovejoy)

C/2013 R1 (Lovejoy) is a long-period comet discovered on 7 September 2013 by Terry Lovejoy using a 0.2-meter (8 in) Schmidt–Cassegrain telescope. It is the fourth comet discovered by Terry Lovejoy. C/2013 R1 crossed the celestial equator on 14 October 2013, becoming a better Northern Hemisphere object.

to C/O Sir

Comet C/1861 G1 (Thatcher) is a long-period comet with roughly a 415-year orbit discovered by A. E. Thatcher. It is responsible for the Lyrid meteor shower. Carl Wilhelm Baeker also independently found this comet. The comet passed about 0.335 AU (50,100,000 km; 31,100,000 mi) from the Earth on 1861-May-05 and last came to perihelion (closest approach to the Sun) on 1861-Jun-03.

C/2006 P1 McNaught

Miss Mitchell's Comet (formally designated C/1847 T1) is a non-periodic comet that American astronomer Maria Mitchell discovered in 1847.The discovery was initially credited to Francesco de Vico. Vico, observing from Rome, was the first to report the comet's discovery in Europe. However, Mitchell observed the comet two days before Vico did, so she became recognized as the comet's discoverer.

Solar SportsBasketball TV

C/2002 T7 (LINEAR) is a comet discovered in 2002 by LINEAR project.

C/2012 S1 (ISON)

n/a

Singer

C/2012 F6 (Lemmon) is a long-period comet discovered in Leo on 23 March 2012, by A. R. Gibbs using the 1.5-m reflector at the Mt. Lemmon Survey, located at the summit of Mount Lemmon in the Catalina Mountains north of Tucson, Arizona, USA. Initially, the object was considered to be of asteroidal nature before later observations confirmed its cometary appearance. Comet Lemmon has a highly eccentric orbit, bringing it as close to 0.73 AU from the sun at perihelion and as far as 973 AU from the sun at aphelion. This also leads to the comet's long-period nature with an orbital period of approximately 8,000 years based on epoch 2050. The comet last reached perihelion on 24 March 2013.For much of 2012, observation of Lemmon remained limited to CCD imagery, but steadily brightened throughout the course of the year. In late-November 2012, the comet became bright enough for telescopic viewing, and had an apparent magnitude estimated at +9 by the year's end. Brightening continued into the early months of 2013 before peaking at an apparent magnitude of +5 in late March, though viewing was mostly limited to the Southern Hemisphere. On 24 March 2013, Lemmon reached its orbital perihelion and afterwards began to dim. On 20 April 2013, Lemmon crossed the celestial equator and became primarily viewable in the Northern Hemisphere, though by this time the comet was significantly dimmer relative to its peak brightness.

C/2014 E2 (Jacques), provisionally designated as S002692, is a long-period comet discovered by the Brazilian astronomers Cristóvão Jacques Lage de Faria, Eduardo Pimentel and João Ribeiro de Barros on the night of 13 March 2014. It was the second comet discovered by the SONEAR Observatory team after comet C/2014 A4.

~518 AU

Gennady Borisov

NASA Jet Propulsion Laboratory, announced by S.H. Pravdo, Named after NEAT Observatory in Hawaii

C/C++

C/D road

C/NOFS, or Communications/Navigation Outage Forecasting System was an American satellite developed by the Air Force Research Laboratory Space Vehicles Directorate to investigate and forecast scintillations in the Earth's ionosphere. It was launched by an Orbital Sciences Corporation Pegasus-XL rocket at 17:01 GMT on 16 April 2008.

Eduardo Pimentel

C/EBPα

C/2011 J2 (LINEAR) is an Oort cloud comet discovered on 4 May 2011 by LINEAR at an apparent magnitude of 19.7 using a 1-meter (39 in) Reflecting telescope. As of September 2014 the comet is around apparent magnitude 17.C/2011 J2 came to perihelion (closest approach to the Sun) on 25 December 2013 at a distance of 3.4 AU from the Sun. On 27 August 2014 an 18th magnitude fragment CK11J02b was detected.

C.w.

C/2007 F1 (LONEOS) is a hyperbolic comet discovered on March 19, 2007 as part as the Lowell Observatory Near Earth Object Search (LONEOS). The comet reached perihelion, or closest approach to the sun on October 28, 2007.The comet reached 6th magnitude in October, making it easily visible in binoculars, and just barely visible to the naked eye for observers in the Northern Hemisphere, just after sunset in the west. It reached a max brightness of magnitude 5 around perihelion, before starting to slowly dim on its way out of the solar system. It continued to move south in the sky and became visible to southern hemisphere comet chasers in mid November.The comet was also observed from both the STEREO spacecraft, first by STEREO-B on October 22 and then by STEREO-A for several days starting from October 28 as the comet had just passed perihelion and was receding from the Sun.

C/2013 A1 (Siding Spring) is an Oort cloud comet discovered on 3 January 2013 by Robert H. McNaught at Siding Spring Observatory using the 0.5-meter (20 in) Uppsala Southern Schmidt Telescope.At the time of discovery it was 7.2 AU from the Sun and located in the constellation Lepus. Comet C/2013 A1 probably took millions of years to come from the Oort cloud. After leaving the planetary region of the Solar System, the post-perihelion orbital period (epoch 2050) is estimated to be roughly 1 million years.C/2013 A1 passed the planet Mars very closely on 19 October 2014, at a distance of 140,496.6 ± 4.0 km (87,300.5 ± 2.5 mi; 0.000939162 ± 2.7×10−8 au) . After its discovery, there was thought to be a chance of a collision with Mars, but this possibility was excluded when its orbit was determined more accurately.All NASA Mars orbiters—including 2001 Mars Odyssey, Mars Reconnaissance Orbiter and MAVEN—as well as ESA's orbiter, Mars Express, and ISRO's orbiter, the Mars Orbiter Mission, reported a healthy status after the comet flyby on 19 October 2014. During the flyby, orbiters around Mars detected thousands of kilograms per hour of comet dust composed of magnesium, iron, sodium, potassium, manganese, nickel, chromium and zinc. In addition, the comet nucleus was determined to be between 400 and 700 meters (0.2 and 0.4 mi), much smaller than originally assumed. The nucleus rotates once every eight hours.

C/1881 K1 (also called the Great Comet of 1881, Comet Tebbutt, 1881 III, 1881b) is a long-period comet discovered by John Tebbutt on 22 May 1881 at Windsor, New South Wales. It is called a great comet because of its brightness at its last apparition.

October 1847

C/1865 B1 (Great Southern Comet of 1865) was a non-periodic comet, which in 1865 was so bright that it was visible to unaided-eye observations in the Southern Hemisphere. The comet could not be seen from the Northern Hemisphere. {may have been generally true, but 1865 soldier's diary in Washington DC showed, March 5th "I saw a star at tenn or eleven O clock in the fornoon", and March 6th "saw a star in the middle of the day"}

Orbiters take cover from Comet Siding Spring during Mars flyby

C/2014 Q3 (Borisov) is a periodic comet discovered at apparent magnitude 17 on 22 August 2014 by Gennady Borisov using a 0.3-meter (12 in) Astrograph. It is the third comet discovered by Borisov. The comet is best viewed from the northern hemisphere.The comet was expected to reach about magnitude ~11 near perihelion (closest approach to the Sun), but brightened to around magnitude 10. By 8 November 2014, the comet had a declination of +83 and was circumpolar from the northern hemisphere.

C/EBP

C/O

C/2007 K5 (Lovejoy)

C/2001 Q4 (NEAT) is a comet with an unusual, almost perpendicular retrograde orbit which brings it into the inner solar system by a deeply southward path. It initially emerged from its remote home spending most of its time near the south celestial pole. This comet was discovered on August 24, 2001 by the Near-Earth Asteroid Tracking program (NEAT).In 2004, residents of the southern hemisphere had the opportunity to watch the comet gradually brighten as it raced toward perihelion.

Comet C/2012 E2 (SWAN) was a Kreutz group sungrazing comet discovered by Vladimir Bezugly in publicly available images taken by the SWAN instrument (Solar Wind ANisotropies) on board the SOHO spacecraft. It is recognized for being the first Kreutz sungrazer observed in SWAN imagery.

João Ribeiro de Barros

C/2012 S4 is a non-periodic comet with the largest listed aphelion of any object on the JPL Small-Body Database. But the listed aphelion distance of 500,000 AU (8 ly) from the Sun is a generic near-perihelion unperturbed two-body solution that assumes the Sun and comet are the only two objects in the Universe. Other comets, such as C/2015 TQ209 and C/2017 A3 (Elenin) have had epoch-dependent solutions with aphelia of more than 1,000,000 AU (16 ly). As a comparison, the closest star, Proxima Centauri, is about 4.24 light years from the Sun, and Wolf 359 is 7.78 light years away. Any comet more than about 150,000 AU (2 ly) from the Sun can be considered lost to the interstellar medium. Using an epoch when C/2012 S4 is beyond the planetary region of the Solar System, it is clear C/2012 S4 will not be ejected from the Solar System.

C/S 9

C/2011 L4 Pan-Starrs

C/S (originally known as Crime/Suspense) is an entertainment channel owned by Solar Entertainment Corporation. It shows mostly American crime and suspense dramas, mysteries, reality, science fiction and action shows. It is the successor to Solar USA, after the latter was replaced by Jack TV. C/S is shown on cable networks throughout the Philippines.

Central/Western Massachusetts Automated Resource Sharing, Inc., or C/W MARS, is a library consortium dedicated to efficient resource sharing and rapid access to information. C/W MARS was formed in 1982 to promote resource sharing among 28 public and academic libraries through a shared library automation system. In 1984, the network was incorporated as a 501(3)(c) not-for-profit corporation and the first member libraries began circulating on the shared system.C/W MARS is governed by its member libraries in the form of a User's Council which approves the annual budget, establishes C/W MARS policies, and elects officers to the Executive Committee. The Executive Committee works to develop and recommend policies, budget and membership. C/W MARS has a professional staff for support of its integrated library system (ILS), network functions and the Digital Treasures library.Currently C/W MARS has more than 144 members, including public, academic, school and special libraries. C/W MARS offers a shared online computer system and combined collections of more than nine million items.

Orlando Mercado

C/N

Defunct

C/-

c/o Segemyhr (read care of Segemyhr) was a Swedish sitcom that premiered on TV4 Sweden on 4 September 1998. The series took place in and around an apartment in an exclusive neighbourhood in Stockholm, Artillerigatan 35 (in reality Grevgatan 14) and later Styrmansgatan 52 in the same area.The series began with three seasons from fall 1998 to fall 1999, thereafter additionally two seasons were added in 2003–2004. All seasons have been released on DVD. Script writers were Fredrik Lindström och Erik Haag.

C/2007 W1 (Boattini) is a long-period comet discovered on 20 November 2007, by Andrea Boattini at the Mt. Lemmon Survey. At the peak the comet had an apparent magnitude around 5.On 3 April 2008, when C/2007 W1 was 0.66AU from the Earth and 1.7AU from the Sun, the coma (expanding tenuous dust atmosphere) of the comet was estimated to be as large as 10 arcminutes. This made the coma roughly 290,000 km in diameter.On 12 June 2008, the comet passed within about 0.21005 AU (31,423,000 km; 19,525,000 mi) of the Earth. The comet came to perihelion (closest approach to the Sun) on 24 June 2008 at a distance of 0.8497 AU.The comet has an observation arc of 285 days allowing a good estimate of the orbit. The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. Using JPL Horizons, the barycentric orbital elements for epoch 2020-Jan-01 generate a semi-major axis of 1,582 AU, an apoapsis distance of 3,163 AU, and a period of approximately 63,000 years.Before entering the planetary region, C/2007 W1 had a hyperbolic trajectory. The comet was probably in the outer Oort cloud with a loosely bound chaotic orbit that was easily perturbed by passing stars.

C/1874 H1 (Coggia) is a famous non-periodic comet, which in the summer of 1874 could be seen by naked eye observation. On the basis of its brightness, the comet has been called the Great Comet of 1874; on July 13 the magnitude of the brightness was between 0 and 1.

Sirsha Ray

C/2010 X1 (Elenin)

C.w. stoneking

C/2013 US10 (Catalina) is an Oort cloud comet discovered on 31 October 2013 by the Catalina Sky Survey at an apparent magnitude of 19 using a 0.68-meter (27 in) Schmidt–Cassegrain telescope. As of September 2015 the comet is around apparent magnitude 6.

C/1911 O1 (Brooks), also designated 1911 V or Comet Brooks, was a bright comet discovered in July 1911 by astronomer William Robert Brooks.It is notable for becoming a bright naked-eye object of second magnitude, with a narrow straight tail of up to thirty degrees in length and a distinct blue colour; this colour seen in some comets is usually a result of the emission of carbon monoxide ions. It was also notable for uniquely being visible at the same time (mid October 1911) and in the same part of the sky as a second bright comet; this was C/1911 S3 (Beljawsky), which reached the first magnitude, had a fifteen degree tail and a bright golden-yellow appearance.

C.w. stoneking jungle blues

C/EBP homologous protein

United States

Ejection trajectory outbound

C/2013 A1 (Siding Spring) is an Oort cloud comet discovered on 3 January 2013 by Robert H. McNaught at Siding Spring Observatory using the 0.5-meter (20 in) Uppsala Southern Schmidt Telescope.At the time of discovery it was 7.2 AU from the Sun and located in the constellation Lepus. Comet C/2013 A1 probably took millions of years to come from the Oort cloud.

Anupam Roy

C/2012 K1 (PANSTARRS) is a retrograde Oort cloud comet discovered at magnitude 19.7, 8.7 AU from the Sun on 17 May 2012 using the Pan-STARRS telescope located near the summit of Haleakalā, on the island of Maui in Hawaii (U.S.).The comet started 2014 as a northern hemisphere object. By late April 2014 it had brightened to roughly apparent magnitude ~8.8 making it a small telescope/binoculars target for experienced observers. In June and July 2014 the comet was near the Sickle of Leo. As of 3 July 2014 the comet had brightened to magnitude 7.9.From 12 July 2014 until 6 September 2014 it had an elongation less than 30 degrees from the Sun. The comet came to perihelion (closest approach to the Sun) on 27 August 2014 at a distance of 1.05 AU (157,000,000 km; 98,000,000 mi) from the Sun. It crosses the celestial equator on 15 September 2014 becoming a southern hemisphere object.The comet peaked around magnitude 6.9 in mid-October 2014 when it had an elongation of around 75 degrees from the Sun. It is visible in binoculars and small telescopes.

C/2012 F6 (Lemmon)

Oukaimeden Observatory

C/2008 T2 (Cardinal), is a non-periodic comet. It was discovered by Rob. D. Cardinal from the University of Calgary. It was visible as a telescopic and binocular object during 2009. It passed near the Perseus star clusters NGC 1528 on March 15 and NGC 1545 on March 17, 2009. It also passed near the Auriga star clusters M38 on April 14, M36 on April 17, and M37 in on April 21, 2009, and passed near Comet Lulin on May 12, 2009, for observers on Earth. It peaked in brightness in June–July 2009 at 8.5-9m.

Donna Burton

~180 AU

C/1861 G1 (Thatcher)

C/2013 R1 (Lovejoy)

Sleeping Piller Raat

C/O Postmaster

Comet C/2010 X1 (Elenin) is an Oort cloud comet discovered by Russian amateur astronomer Leonid Elenin on December 10, 2010, through remote control of the International Scientific Optical Network's robotic observatory near Mayhill in the U.S. state of New Mexico. The discovery was made using the automated asteroids discovery program CoLiTec. At the time of discovery, the comet had an apparent magnitude of 19.5, making it about 150,000 times fainter than can be seen with the naked eye.

Central/Western Massachusetts Automated Resource Sharing, Inc., or C/W MARS, is a library consortium dedicated to efficient resource sharing and rapid access to information. C/W MARS was formed in 1982 to promote resource sharing among 28 public and academic libraries through a shared library automation system.

Heavens AboveIAU Minor Planet Center

C/c++

C/52 in

C/NOFS, or Communications/Navigation Outage Forecasting System was an American satellite developed by the Air Force Research Laboratory Space Vehicles Directorate to investigate and forecast scintillations in the Earth's ionosphere. It was launched by an Orbital Sciences Corporation Pegasus-XL rocket at 17:01 GMT on 16 April 2008. It decayed on 28 November 2015.The satellite, which was operated by the USAF STP, allowed the US military to predict the effects of ionospheric activity on signals from communication and navigation satellites, outages of which could potentially cause problems in battlefield situations.C/NOFS had a three-axis stabilisation system, and was equipped with seven sensors. It was placed into a low Earth orbit with orbital inclination of 13°, a perigee of 400 km and an apogee of 850 km. It carried the CINDI experiment for NASA. Launch was originally scheduled for 2003, but was delayed due to a number of issues.

C/1999 F1 (Catalina) is one of the longest known long-period comets. It was discovered on March 23, 1999, by the Catalina Sky Survey.The comet has an observation arc of 2,360 days allowing a good estimate of the orbit. The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. C/1999 F1 made its closest approach to Neptune in August 2017. Using JPL Horizons, the barycentric orbital elements for epoch 2035-Jan-01 generate a semi-major axis of 33,300 AU, an apoapsis distance of 66,600 AU, and a period of approximately 6 million years. Comet West has a similar period.The generic JPL Small-Body Database browser uses a near-perihelion epoch of 2001-May-19 which is before the comet left the planetary region and makes the highly eccentric aphelion point inaccurate since it does not account for any planetary perturbations. The heliocentric JPL Small-Body Database solution also does not account for the mass of Jupiter.

TV4 Studios

Wilson Tieng

LONEOS telescope at Lowell Observatory

C/2001 Q4 (NEAT)

Orbiters hide as Comet Siding Spring passes Mars.

C/2007 E2 (Lovejoy) is a non-periodic comet discovered by Terry Lovejoy on 15 March 2007. Its perihelion was 27 March 2007, while its closest approach to Earth was 25 April 2007 in Hercules at a distance of 0.44 AU. Maximum apparent magnitude was approximately +8.The discovery was made using a Canon EOS 350D consumer grade digital camera, and not a CCD survey camera.

C/D lanes

Robert D. Matson and Michael Mattiazzo

C/2013 US10 as seen on 9 Dec 2015. To the upper left is the ion gas tail and to the lower right is the dust tail.

SOLAR Entertainment

C/2013 V5 (Oukaimeden) is a retrograde Oort cloud comet discovered on 12 November 2013 by Oukaimeden Observatory at an apparent magnitude of 19.4 using a 0.5-meter (20 in) reflecting telescope.From 5 May 2014 until 18 July 2014 it had an elongation less than 30 degrees from the Sun. By late August 2014 it had brighten to apparent magnitude 8 making it a small telescope and high-end binoculars target for experienced observers. It crossed the celestial equator on 30 August 2014 becoming a southern hemisphere object. On 16 September 2014 the comet passed 0.480 AU (71,800,000 km; 44,600,000 mi) from Earth. The comet peaked around magnitude 6.2 in mid-September 2014 but only had an elongation of about 35 degrees from the Sun. On 20 September 2014 the comet was visible in STEREO HI-1B. The comet came to perihelion (closest approach to the Sun) on 28 September 2014 at a distance of 0.625 AU (93,500,000 km; 58,100,000 mi) from the Sun.C/2013 V5 is dynamically new. It came from the Oort cloud with a loosely bound chaotic orbit that was easily perturbed by galactic tides and passing stars. Before entering the planetary region (epoch 1950), C/2013 V5 had an orbital period of several million years. After leaving the planetary region (epoch 2050), it will have an orbital period of about 6000 years.

C/2016 U1 (NEOWISE) is a hyperbolic comet discovered 21 October 2016 by NEOWISE, the asteroid-and-comet-hunting portion of the Wide-Field Infrared Survey Explorer (WISE) mission. The comet may be visible to skywatchers on Earth, at an estimated +6th magnitude (naked eye brightness), during the first week of 2017 and will be closest to the Sun on 14 January 2017. The comet, closest to the Earth on 13 December 2016 at 106,000,000 km (66,000,000 mi) away, is not considered a threat to Earth.

C/l

Comet C/2015 F5 (SWAN-XingMing) was discovered on March 29, 2015 in near real time SWAN images of the SOHO spacecraft, by Szymon Liwo and Worachate Boonplod. It was also independently discovered on April 4, 2015 by Guoyou Sun and Gao Xing at the XingMing observatory near Ürümqi, China. At discovery, the comet had just passed perihelion and was only 0,35 AU from the Sun, shining at about +10 mag. As of May 2015 the comet had faded below mag +13. The comet is periodic with an orbital period of about 61 years .

LINEAR

C/2014 Q1 (PANSTARRS)

C/2007 W1 (Boattini)

William Tieng

Anjan Mahato

C/2001 Q4 (NEAT) is a comet with an unusual, almost perpendicular retrograde orbit which brings it into the inner solar system by a deeply southward path. It initially emerged from its remote home spending most of its time near the south celestial pole. This comet was discovered on August 24, 2001 by the Near-Earth Asteroid Tracking program (NEAT).In 2004, residents of the southern hemisphere had the opportunity to watch the comet gradually brighten as it raced toward perihelion. On May 6, 2004 the comet approached within 0.32 AU of the Earth. Beginning in early May, the comet started racing north and burst into view in the northern hemisphere when it had reached almost maximum brightness.With a near perihelion orbital eccentricity of 1.00069 (epoch 2004-May-18) that keeps a barycentric epoch 2014-Jan-01 eccentricity of 1.00067, this hyperbolic comet is going to be ejected from the Solar System.

STPAFRLDMSG
gee

C/C++ Users Journal

~832 AU

C/S Origin

Kaushik Ganguly

Comet C/2007 E2 discovery frame

Ejection

David Rabinowitz

Stargazer

unknown/disintegrated

nonperiodic; est.

Catalina Sky Survey

Sergi Ivanovich Beljawsky

C/N ratio

horizontal

C/2014 Q2 (Lovejoy)

C/o

C/52nd

C/O Postmaster is a book written by Thomas R St George, and published in 1943 by Thomas Y. Crowell Co. This book was a best-seller and Book Of The Month Club selection for October 1943.The book begins as the author leaves his Army boot camp in California in the spring of 1942. He and his fellow soldiers find themselves assigned to the 32nd Infantry Division (United States) and sent overseas.They arrive in Australia, and spend several months in infantry training just outside a major city (Brisbane, though not identified in the book). When not on duty, the author and his friends wander around Australia, getting to know the people, meeting girls, and having various adventures.The author's unit is then transferred to another camp in a more remote part of Australia, where training gets tougher and there are no civilians around. Finally, the entire unit is sent to New Guinea in response to a Japanese attack there. The book ends with the whole unit boarding transport aircraft for New Guinea.C/O Postmaster is illustrated by the author's own drawings.

Great Comet of 1807

C/2014 Q2 (Lovejoy) is a long-period comet discovered on 17 August 2014 by Terry Lovejoy using a 0.2-meter (8 in) Schmidt–Cassegrain telescope. It was discovered at apparent magnitude 15 in the southern constellation of Puppis. It is the fifth comet discovered by Terry Lovejoy. Its blue-green glow is the result of organic molecules and water released by the comet fluorescing under the harsh UV and optical light of the sun as it passes through space.

C/2012 F6 (Lemmon) is a long-period comet discovered in Leo on 23 March 2012, by A. R. Gibbs using the 1.5-m reflector at the Mt. Lemmon Survey, located at the summit of Mount Lemmon in the Catalina Mountains north of Tucson, Arizona, USA. Initially, the object was considered to be of asteroidal nature before later observations confirmed its cometary appearance.

Comet C/2015 F3 (SWAN) was discovered in March 2015 by Rob Matson, Vladimir Bezugly and Michael Matiazzo in near real time images taken by the SWAN instrument aboard the SOHO spacecraft. At discovery the comet was already shining at around 10th magnitude as it was already near perihelion .

c/o Segemyhr (read care of Segemyhr) was a Swedish sitcom that premiered on TV4 Sweden on 4 September 1998. The series took place in and around an apartment in an exclusive neighbourhood in Stockholm, Artillerigatan 35 (in reality Grevgatan 14) and later Styrmansgatan 52 in the same area.The series began with three seasons from fall 1998 to fall 1999, thereafter additionally two seasons were added in 2003–2004. All seasons have been released on DVD.

C/52d in

C/S ELEMENTS

C.w. anderson

C/2000 W1 (Utsunomiya-Jones) is a long-period comet discovered on November 18, 2000, by Syogo Utsunomiya and Albert F. A. L. Jones.The comet has an observation arc of 58 days allowing a reasonable estimate of the orbit. But the near-parabolic trajectory with an osculating perihelion eccentricity of 0.9999996 generates an extreme unperturbed aphelion distance of 2,034,048 AU (32 light-years). The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. Using JPL Horizons, the barycentric orbital elements for epoch 2020-Jan-01 generate a semi-major axis of 832 AU, an aphelion distance of 1660 AU, and a period of approximately 24,000 years.C/2000 W1 disappeared in February 2001.

C.x.

Comet Lemmon in Tucana on 16 February 2013

Comet C/2002 V1 (NEAT) is a non-periodic comet that appeared in November 2002. The comet peaked with an apparent magnitude of approximately –0.5, making it the eighth-brightest comet seen since 1935. It was seen by SOHO in February 2003. At perihelion the comet was only 0.099258 astronomical units (14,848,800 kilometres; 9,226,600 miles) from the Sun. (Slight controversy arose when the comet failed to break up when it approached the Sun, as expected by some scientists if it were a small comet.)The comet was hit by a coronal mass ejection during its pass near the Sun; some rumoured it had "disturbed" the Sun, but scientists dismissed this notion. The scientific consensus is that there is no link between comets and CMEs that can not be explained through simple coincidence, and there were 56 CMEs in February 2003. On February 18, 2003, comet C/2002 V1 (NEAT) passed 5.7 degrees from the Sun. C/2002 V1 (NEAT) appeared impressive as viewed by the Solar and Heliospheric Observatory (SOHO) as a result of the forward scattering of light off of the dust in the coma and tail. After the comet left LASCO's field of view, on February 20, 2003, an object was seen at the bottom of a single frame. Although technicians dismissed this as a software bug, rumours persisted that the object had been expelled from the Sun.The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. Using JPL Horizons, the barycentric orbital elements for epoch 2020-Jan-01 generate a semi-major axis of 1,100 AU, an apoapsis distance of 2,230 AU, and a period of approximately 37,000 years.

The Eclipse Comet of 1948, formally known as C/1948 V1, was an especially bright comet discovered during a solar eclipse on November 1, 1948. Although there have been several comets that have been seen during solar eclipses, the Eclipse Comet of 1948 is perhaps the best-known; it was however, best viewed only from the Southern Hemisphere.When it was first discovered during totality, it was already quite bright, at magnitude -2; as it was near perihelion, this was its peak brightness.

India

C/2013 US10

Comet C/2002 V1 (NEAT) is a non-periodic comet that appeared in November 2002. The comet peaked with an apparent magnitude of approximately –0.5, making it the eighth-brightest comet seen since 1935. It was seen by SOHO in February 2003. At perihelion the comet was only 0.099258 astronomical units (14,848,800 kilometres; 9,226,600 miles) from the Sun.

C/2012 K1 (PANSTARRS) is a retrograde Oort cloud comet discovered at magnitude 19.7, 8.7 AU from the Sun on 17 May 2012 using the Pan-STARRS telescope located near the summit of Haleakalā, on the island of Maui in Hawaii (U.S.).The comet started 2014 as a northern hemisphere object. By late April 2014 it had brightened to roughly apparent magnitude ~8.8 making it a small telescope/binoculars target for experienced observers. In June and July 2014 the comet was near the Sickle of Leo.

C/52 infantry regiment

C/2012 S4 is a non-periodic comet with the largest listed aphelion of any object on the JPL Small-Body Database. But the listed aphelion distance of 500,000 AU (8 ly) from the Sun is a generic near-perihelion unperturbed two-body solution that assumes the Sun and comet are the only two objects in the Universe. Other comets, such as C/2015 TQ209 and C/2017 A3 (Elenin) have had epoch-dependent solutions with aphelia of more than 1,000,000 AU (16 ly).

C/O Postmaster is a book written by Thomas R St George, and published in 1943 by Thomas Y. Crowell Co. This book was a best-seller and Book Of The Month Club selection for October 1943.The book begins as the author leaves his Army boot camp in California in the spring of 1942.

C/2012 E2 (SWAN)

C/2011 L4 (PANSTARRS) is a non-periodic comet discovered in June 2011 that became visible to the naked eye when it was near perihelion in March 2013. It was discovered using the Pan-STARRS telescope located near the summit of Haleakalā, on the island of Maui in Hawaii. Comet C/2011 L4 probably took millions of years to come from the Oort cloud. After leaving the planetary region of the Solar System, the post-perihelion orbital period (epoch 2050) is estimated to be roughly 106000 years. Dust and gas production suggests the comet nucleus is roughly 1 kilometer (0.62 mi) in diameter.

A. E. Thatcher

William Robert Brooks

C/2007 N3 Lulin

MAVEN and Comet Siding Spring encounter Mars.

C.y.

C/1989 X1 (Austin) (old-style designations 1990 V and 1989c1) was a comet discovered by New Zealand amateur Rodney R. D. Austin on December 6, 1989. By the time of its discovery, it was already obvious that it must be an unusually large object.

Bengali

C/D lane

C/2007 F1 (LONEOS) is a hyperbolic comet discovered on March 19, 2007 as part as the Lowell Observatory Near Earth Object Search (LONEOS). The comet reached perihelion, or closest approach to the sun on October 28, 2007.The comet reached 6th magnitude in October, making it easily visible in binoculars, and just barely visible to the naked eye for observers in the Northern Hemisphere, just after sunset in the west.

Stockholm, Grevgatan 14

Comet Beljawsky is also known as 1911 IV and 1911g according to the naming conventions at the time. The comet was discovered by the Russian astronomer Sergei Ivanovich Beljawsky September 29, 1911 and shortly thereafter it was independently seen by four or five other observers in the United States and probably by others throughout the world. At the time it was discovered, the comet was near to the Sun which made observations difficult. However, several days after discovery it was a naked eye object for a few days in the morning sky and later, after perihelion, as an evening object. It faded rapidly, becoming visible only in telescopes and was last seen on February 17, 1912. The comet sported a tail 8 to 10 degrees in length. In mid-October it was visible in the evening sky at the same time as another bright comet, C/1911 O1 Brooks.Comet Beljawsky is a long-period (non-periodic) comet noteworthy for having a hyperbolic orbit and so it is not expected to return to the inner Solar System again.

C/52d

C/K (Disambiguation)

Comet C/2010 X1 (Elenin) is an Oort cloud comet discovered by Russian amateur astronomer Leonid Elenin on December 10, 2010, through remote control of the International Scientific Optical Network's robotic observatory near Mayhill in the U.S. state of New Mexico. The discovery was made using the automated asteroids discovery program CoLiTec. At the time of discovery, the comet had an apparent magnitude of 19.5, making it about 150,000 times fainter than can be seen with the naked eye. The discoverer, Leonid Elenin, originally estimated that the comet nucleus was 3–4 km in diameter, but more recent estimates place the pre-breakup size of the comet at 2 km. Comet Elenin started disintegrating in August 2011, and as of mid-October 2011 was not visible even using large ground-based telescopes.

C/1989 X1 (Austin) (old-style designations 1990 V and 1989c1) was a comet discovered by New Zealand amateur Rodney R. D. Austin on December 6, 1989. By the time of its discovery, it was already obvious that it must be an unusually large object. At that time the comet was still more than 350 million kilometres from the Sun and yet it was so bright that it was seen as an 11th magnitude object (that is, 1/100 as bright as what can be perceived with the unaided eye).More observations were soon made, establishing the comet's orbit, and it was found that it will pass through its perihelion (the point of its orbit where it is closest to the Sun) on 9 April 1990 at a distance of about 53 million kilometres, inside the orbit of Mercury, the planet closest to the Sun.Thereafter it will move outwards again and, by good luck, it will come within 38 million kilometres of the Earth on May 25. It will be well situated in the sky for observation from the northern hemisphere after 20 April 1990 when it can be seen low above the NW horizon, just after sunset, and even better above the NE horizon, shortly before sunrise. It is expected that Comet Austin will then have developed a tail which should be easily observable and provide spectators with a grand celestial view.

C/F Express Samina

Chere Jaoar Gaan

Mars as seen from Comet Siding Spring

Technology

Comet Siding Spring as seen from Mars

C/2002 T7 (LINEAR)

Tina Casale

C/K (disambiguation)

C/S-9

Comet Siding Spring – watched by several landers and orbiting spacecraft.

Miss Mitchell's Comet

Soundtrack

C/Cpp Users Journal

C/Si

Image of Comet PanSTARRS by Gingin Observatory

Image of 2014 E2 in the constellation Antlia at magnitude 10.5

C/Z

C/2007 K5 (Lovejoy) is a periodic comet, discovered on 26 May 2007 by amateur astronomer Terry Lovejoy.

C/1999 S4 (LINEAR) is a long-period comet discovered on September 27, 1999, by LINEAR.The comet made its closest approach to the Earth on July 22, 2000, at a distance of 0.3724 AU (55,710,000 km; 34,620,000 mi). It came to perihelion on July 26, 2000, at a distance of 0.765 AU from the Sun.The comet nucleus was estimated to be about 0.9 km in diameter. Before the comet broke up, the (dust and water) nucleus erosion rate was about 1 cm per day. The comet brightened near July 5, 2000, and underwent a minor fragmentation event. The comet brightened again around July 20, 2000, and then disintegrated. The published optical and most radio data support that the main nuclear decay started July 23, 2000. The dust cloud expanded at about 20 meters per second (45 miles per hour) while the fragments expanded at around 7 m/s (16 mph). Other comets are known to have disappeared, but Comet LINEAR is the first one to have been caught in the act.The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. Using JPL Horizons, the barycentric orbital elements for epoch 2010-Jan-01 generate a semi-major axis of 700 AU, an aphelion distance of 1400 AU, and a period of approximately 18,700 years.

The Eclipse Comet of 1948, formally known as C/1948 V1, was an especially bright comet discovered during a solar eclipse on November 1, 1948. Although there have been several comets that have been seen during solar eclipses, the Eclipse Comet of 1948 is perhaps the best-known; it was however, best viewed only from the Southern Hemisphere.When it was first discovered during totality, it was already quite bright, at magnitude -2; as it was near perihelion, this was its peak brightness. Its visibility during morning twilight improved as it receded outward from the Sun; it peaked near zero magnitude, and at one point displayed a tail roughly 30 degrees in length, before falling below naked eye visibility by the end of December.

C/2006 M4 is one of several SWAN comets; the others are C/2002 O6, C/2004 H6, C/2004 V13, C/2005 P3, P/2005 T4, C/2009 F6, C/2011 Q4 and C/2012 E2.Comet C/2006 M4 (SWAN) is a non-periodic comet discovered in late June 2006 by Robert D. Matson of Irvine, California and Michael Mattiazzo of Adelaide, South Australia in publicly available images of the Solar and Heliospheric Observatory (SOHO).

Bucholz Runway 6/24

Themey Jai

C/2014 E2 (Jacques)

C/o Footpath

C/1992 J1 is a comet that was discovered 1 May 1992 by David Rabinowitz of the Spacewatch Project. This was the first comet to be discovered using an automated system.Using a generic heliocentric (two-body) solution calculated near the time of perihelion (closest approach to the Sun), it is estimated to have an aphelion (Q) (furthest distance from the Sun) of 154,202 AU (more than 2 Light-years).

Great Comet of 1760

C/2007 Q3 (Siding Spring), is an Oort cloud comet that was discovered by Donna Burton in 2007 at Siding Spring Observatory in New South Wales, Australia. Siding Spring came within 1.2 astronomical units of Earth and 2.25 AU of the Sun on October 7, 2009.

Comet Beljawsky is also known as 1911 IV and 1911g according to the naming conventions at the time. The comet was discovered by the Russian astronomer Sergei Ivanovich Beljawsky September 29, 1911 and shortly thereafter it was independently seen by four or five other observers in the United States and probably by others throughout the world. At the time it was discovered, the comet was near to the Sun which made observations difficult.

Mars Fleet and Comet Siding Spring.webm

Comet C/2006 VZ13 (LINEAR) (also written C/2006 VZ13), is a non-periodic comet discovered November 13, 2006 by the LINEAR.The object was initially believed to be a minor planet due to its stellar appearance in the early images. However, observers soon detected a small coma and the telltale green cometary cast.The comet peaked at approximately magnitude +7.5, much brighter than predicted. The comet made Earth approach on July 14, 2007 at a distance of 0.575 AU. Perihelion was August 10, 2007 at a distance of 1.015 AU.

Rob D. Cardinal

center

Comet Zona, C/1890e, C/1890 IV

C/2001 OG108 (LONEOS) is a Halley-type comet with an orbital period of 48.51 years. It was discovered on 28 July 2001 by the LONEOS telescope at Lowell Observatory.Observations taken in January and February 2002 showed that the "asteroid" had developed a small amount of cometary activity as it approached perihelion. It was subsequently reclassified as a comet. The comet came to perihelion (closest approach to the Sun) on 15 March 2002.

Syogo Utsunomiya

yes

Mars orbiters landers rovers during Comet Siding Spring.webm

C/1999 S4 (LINEAR) is a long-period comet discovered on September 27, 1999, by LINEAR.The comet made its closest approach to the Earth on July 22, 2000, at a distance of 0.3724 AU (55,710,000 km; 34,620,000 mi). It came to perihelion on July 26, 2000, at a distance of 0.765 AU from the Sun.The comet nucleus was estimated to be about 0.9 km in diameter. Before the comet broke up, the (dust and water) nucleus erosion rate was about 1 cm per day.

C/NET

C/52d infantry

C/A/T

C/1999 F1 (Catalina) is one of the longest known long-period comets. It was discovered on March 23, 1999, by the Catalina Sky Survey.The comet has an observation arc of 2,360 days allowing a good estimate of the orbit. The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. C/1999 F1 made its closest approach to Neptune in August 2017.

C/2006 vz13

C/D box

C/K

C/2007 Q3 (Siding Spring), is an Oort cloud comet that was discovered by Donna Burton in 2007 at Siding Spring Observatory in New South Wales, Australia. Siding Spring came within 1.2 astronomical units of Earth and 2.25 AU of the Sun on October 7, 2009. The comet was visible with binoculars until January 2010.Images of the comet taken in March 2010 by N.Howes using the Faulkes telescope, showed that the nucleus had fragmented.The comet has an observation arc of 1,327 days and is still been observed as of April 2011. The orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. Using JPL Horizons, the barycentric orbital elements for epoch 2030-Jan-01 generate a semi-major axis of 7,500 AU, an apoapsis distance of 15,000 AU, and a period of approximately 650,000 years.Before entering the planetary region (epoch 1950), C/2007 Q3 had a calculated barycentric orbital period of ~6.4 million years with an apoapsis (aphelion) distance of about 69,000 AU (1.09 light-years). The comet was probably in the outer Oort cloud for millions or billions of years with a loosely bound chaotic orbit until it was perturbed inward.

C/2001 OG108 (LONEOS) is a Halley-type comet with an orbital period of 48.51 years. It was discovered on 28 July 2001 by the LONEOS telescope at Lowell Observatory.Observations taken in January and February 2002 showed that the "asteroid" had developed a small amount of cometary activity as it approached perihelion. It was subsequently reclassified as a comet. The comet came to perihelion (closest approach to the Sun) on 15 March 2002. The next perihelion passage is calculated to be on 6 June 2050.The comet has a rotational period of 2.38 ± 0.02 days (57.12 hr).In 2003, the comet was estimated to have a mean absolute V magnitude (H) of 13.05 ± 0.10, with an albedo of 0.03, giving an effective radius of 8.9 ± 0.7 km. Using data from Fernandez (2004–2005) JPL lists the comet with an albedo of 0.05 and a diameter of 13.6 ± 1.0 km.This comet probably represents the transition between typical Halley-family/long-period comets and extinct comets. Damocloids have been studied as possible extinct cometary candidates due to the similarity of their orbital parameters with those of Halley-family comets.

Sun view of Comet Siding Spring and the Mars orbiting fleet.ogg

C/2007 F1 (LONEOS)

C.w. Stoneking

Unlock The Truth

~359 AU

C.z.

NEOWISE project

C/o Sir

C/2015 G2 (MASTER)

C/2007 Q3 (Sliding Spring)

C/o Segemyhr

Willy Y. Tieng

C/D roads

The Great Comet of 1760 (C/1760 A1) was first seen on 7 January 1760 by Abbe Chevalier at Lisbon. Charles Messier also spotted the comet on 8 January 1760 in Paris, by the sword of Orion. The comet was his third discovery and the comet was the 51st to have a calculated orbit. Messier observed the comet for a total of 6 days.It approached the Earth to within approximately 0.0682 astronomical unit (AU) or 6.34 million miles. This is the 17th closest approach by a comet of all time.

Projected position of Comet Siding Spring and its closest approach to Mars

Announcing Comet Catalina

C/W MARS

Solar USA

Eclipse Comet, 1948 XI, 1948 V1

the Augustinian monk Parisi at Castrogiovanni