67P/Churyumov–Gerasimenko

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67P/Churyumov–Gerasimenko
Comet 67P on 19 September 2014 NavCam mosaic.jpg
Comet Churyumov–Gerasimenko as seen bi Rosetta
Discovery
Discovered bi Klim Ivanovych Churyumov
Svetlana Ivanovna Gerasimenko
Discovery steid Almaty, Soviet Union
Discovery date 20 September 1969
Designations
Alternative names 1969 R1, 1969 IV, 1969h, 1975 P1, 1976 VII, 1975i, 1982 VIII, 1982f, 1989 VI, 1988i[1]
Orbital characteristics[1]
Epoch 2014-Aug-10 (JD 2456879.5)
Aphelion 5.6829 AU (850,150,000 km)
Perihelion 1.2432 AU (185,980,000 km)
Semi-major axis 3.4630 AU (518,060,000 km)
Eccentricity 0.64102
Orbital period 6.44 yr
Mean anomaly 303.71°
Inclination 7.0405°
Longitude o ascendin node 50.147°
Argument o perihelion 12.780°
Pheesical characteristics
Dimensions Lairge lobe:
4.1×3.2×1.3 km (2.55×1.99×0.81 mi)
Smaa lobe:
2.5×2.5×2 km (1.6×1.6×1.2 mi)[2]
Mass (1.0±0.1)×1013 kg[3]
Mean density 0.4 g/cm³[2]
Escape velocity Estimatit 1 m/s (3 ft/s)[4]
Rotation period 12.4043±0.0007 h[5]
North pole right ascension 69.00°[2]
North pole declination 64.00°[2]
Surface temp. min mean max
Kelvin 205 230
Celsius −68 −43

Comet Churyumov–Gerasimenko (Roushie: Комета Чурюмова — Герасименко), formally designatit 67P/Churyumov–Gerasimenko and sometimes shortened tae Chury, 67P/C–G, Comet 67P or simply 67P, is a comet wi a current orbital period o 6.45 years,[1] a rotation period o approximately 12.4 oors[5] an a maximum velocity o 135,000 km/h (38 km/s; 84,000 mph).[6] It will next come tae perihelion (closest approach tae the Sun) on 13 August 2015.[7][8][9] Lik aw comets, it is named efter its discoverers, Soviet astronomers Klim Ivanovych Churyumov an Svetlana Ivanovna Gerasimenko, who first observed it on photographic plates in 1969.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 "JPL Small-Body Database Browser: 67P/Churyumov-Gerasimenko". NASA/Jet Propulsion Laboratory. 5 October 2013. Retrieved 21 January 2014. 
  2. 2.0 2.1 2.2 2.3 Baldwin, Emily (6 October 2014). "Measuring Comet 67P/C-G". European Space Agency. Retrieved 7 October 2014. 
  3. Baldwin, Emily (21 August 2014). "Determining the mass of comet 67P/C-G". European Space Agency. Retrieved 21 August 2014. 
  4. Dambeck, Thorsten (21 January 2014). "Expedition to primeval matter". Max-Planck-Gesellschaft. Retrieved 19 September 2014. 
  5. 5.0 5.1 Mottola, S.; Lowry, S.; Snodgrass, C.; Lamy, P. L.; Toth, I.; et al. (September 2014). "The rotation state of 67P/Churyumov-Gerasimenko from approach observations with the OSIRIS cameras on Rosetta". Astronomy and Astrophysics. 569. L2. Bibcode:2014A&A...569L...2M. doi:10.1051/0004-6361/201424590. 
  6. Staff (2014). "Rosetta's Frequently Asked Questions". European Space Agency. Retrieved 12 November 2014. 
  7. Yoshida, Seiichi (30 December 2010). "67P/Churyumov-Gerasimenko". Aerith.net. Retrieved 9 February 2012. 
  8. "67P/Churyumov-Gerasimenko". Minor Planet Center. Retrieved 17 June 2014. 
  9. Kinoshita, Kazuo (7 May 2009). "67P/Churyumov-Gerasimenko". Comet Orbit. Retrieved 25 April 2009.