67P
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| Discovery | |||||||||||||||||
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| Discovered by |
Klim Ivanovich Churyumov Svetlana Ivanovna Gerasimenko |
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| Discovery site |
Alma-Ata, Kazakh SSR, Soviet Union Kiev, Ukrainian SSR, Soviet Union |
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| Discovery date | 20 September 1969 | ||||||||||||||||
| Designations | |||||||||||||||||
| 1969 R1, 1969 IV, 1969h, 1975 P1, 1976 VII, 1975i, 1982 VIII, 1982f, 1989 VI, 1988i | |||||||||||||||||
| Orbital characteristics | |||||||||||||||||
| Epoch 10 August 2014 (JD 2456879.5) | |||||||||||||||||
| Aphelion | 5.6829 AU (850,150,000 km) | ||||||||||||||||
| Perihelion | 1.2432 AU (185,980,000 km) | ||||||||||||||||
| 3.4630 AU (518,060,000 km) | |||||||||||||||||
| Eccentricity | 0.64102 | ||||||||||||||||
| 6.44 yr | |||||||||||||||||
| 303.71° | |||||||||||||||||
| Inclination | 7.0405° | ||||||||||||||||
| 50.147° | |||||||||||||||||
| 12.780° | |||||||||||||||||
| Physical characteristics | |||||||||||||||||
| Dimensions | Large lobe: 4.1×3.3×1.8 km (2.5×2.1×1.1 mi) Small lobe: 2.6×2.3×1.8 km (1.6×1.4×1.1 mi) |
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| Volume | 18.7 km3 (4.5 cu mi) | ||||||||||||||||
| Mass | (9.982±0.003)×1012 kg | ||||||||||||||||
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Mean density
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0.533 ± 0.006 g/cm3 (0.01926 ± 0.00022 lb/cu in) | ||||||||||||||||
| est. 1 m/s (3 ft/s) | |||||||||||||||||
| 12.4043±0.0007 h | |||||||||||||||||
| 52° | |||||||||||||||||
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North pole right ascension
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69.3° | ||||||||||||||||
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North pole declination
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64.1° | ||||||||||||||||
| Albedo | 0.06 | ||||||||||||||||
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67P/Churyumov–Gerasimenko (abbreviated as 67P or 67P/C-G) is a Jupiter-family comet, originally from the Kuiper belt, with a current orbital period of 6.45 years, a rotation period of approximately 12.4 hours and a maximum velocity of 135,000 km/h (38 km/s; 84,000 mph). Churyumov–Gerasimenko is approximately 4.3 by 4.1 km (2.7 by 2.5 mi) at its longest and widest dimensions. It was first observed on photographic plates in 1969 by Soviet astronomers Klim Ivanovych Churyumov and Svetlana Ivanovna Gerasimenko, after whom it is named. It came to perihelion (closest approach to the Sun) on 13 August 2015.
Churyumov–Gerasimenko was the destination of the European Space Agency's Rosetta mission, launched on 2 March 2004.Rosetta rendezvoused with Churyumov–Gerasimenko on 6 August 2014 and entered orbit on 10 September 2014.Rosetta's lander, Philae, landed on the comet's surface on 12 November 2014, becoming the first spacecraft to land on a comet nucleus. On 30 September 2016, the Rosetta spacecraft ended its mission by landing on the comet in its Ma'at region.
Churyumov–Gerasimenko was discovered in 1969 by Klim Ivanovich Churyumov of the Kiev University's Astronomical Observatory, who examined a photograph that had been exposed for comet Comas Solà by Svetlana Ivanovna Gerasimenko on 11 September 1969 at the Alma-Ata Astrophysical Institute, near Alma-Ata (now Almaty), the then-capital city of Kazakh Soviet Socialist Republic, Soviet Union. Churyumov found a cometary object near the edge of the plate, but assumed that this was comet Comas Solà.
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