82P/Gehrels

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82P/Gehrels
Discovery
Discovered by Tom Gehrels
Discovery date October 27, 1975
Alternative
designations
Gehrels 3
Orbital characteristics A
Epoch 2011-Feb-08
2455600.5
Aphelion 4.6509 AU
Perihelion 3.6333 AU[1]
Semi-major axis 4.1421 AU
Eccentricity 0.12284
Orbital period 8.43 a
Inclination 1.1259°
Last perihelion 2010-Jan-12[1]
Next perihelion 2018 June 28[2][3]

82P/Gehrels is a periodic comet that was discovered on October 27, 1975 by Tom Gehrels at the Palomar Mountain Observatory in California.[1] It has an estimated diameter of 1.46 km.[4] This object has been identified as a quasi-Hilda comet, which means it is near a 3:2 mean-motion resonance with the planet Jupiter.[5] It fits the definition of an Encke-type comet with (TJupiter > 3; a < aJupiter).[1]

On 15 August 1970 the comet passed 0.00143 AU (214,000 km; 133,000 mi) from Jupiter.[6]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 82P/Gehrels 3". Jet Propulsion Laboratory. 2011-03-14 last obs. Retrieved 2012-02-18.  Check date values in: |date= (help)
  2. ^ Seiichi Yoshida (2011-07-03). "82P/Gehrels 3". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-18. 
  3. ^ Patrick Rocher (2011-03-23). "Note number : 0090 P/Gehrels 3 : 82P". Institut de mecanique celeste et de calcul des ephemerides. Retrieved 2012-02-19. 
  4. ^ Lamy, P. L.; Toth, I.; Fernandez, Y. R.; Weaver, H. A. (2004). "The sizes, shapes, albedos, and colors of cometary nuclei". In M. C. Festou, H. U. Keller, and H. A. Weaver. Comets II. Bibcode:2004come.book..223L. 
  5. ^ Ohtsuka, K.; Ito, T.; Yoshikawa, M.; Asher, D. J.; Arakida, H. (October 2008). "Quasi-Hilda comet 147P/Kushida-Muramatsu. Another long temporary satellite capture by Jupiter". Astronomy and Astrophysics 489 (3): 1355–1362. arXiv:0808.2277. Bibcode:2008A&A...489.1355O. doi:10.1051/0004-6361:200810321. 
  6. ^ "JPL Close-Approach Data: 82P/Gehrels 3". 2011-03-14 last obs. Retrieved 2012-07-28.  Check date values in: |date= (help)

External links[edit]

Periodic comets (by number)
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