A quasi-Hilda comet (QHC) is a Jupiter-family comet that interacts strongly with Jupiter and undergoes extended temporary capture by it. These comets are associated with the Hilda asteroid zone in the 3:2 inner mean-motion resonance with Jupiter. Typically, asteroids in this zone have a semimajor axis between 3.70 and 4.20 AU, eccentricities below 0.30, and inclinations of no more than 20°. Comets can be temporarily perturbed into this group and then perturbed back out again. Eight percent of the comets that leave the 3:2 resonance end up impacting Jupiter.
Known quasi-Hilda comets
These numbered comets belong to the group of quasi-Hilda comet:
|215P/NEAT (2002 O8)||4.83||0.200||12.7||2010-06-06|
|228P/LINEAR (2001 YX127)||4.89||0.176||7.91||2011-08-26|
|231P/LINEAR-NEAT (2003 CP7)||5.01||0.246||12.3||2011-05-16|
|246P/NEAT (2004 F3)||5.17||0.286||15.9||2013-01-28|
39P/Oterma was a quasi-Hilda before a close approach to Jupiter in 1963. 77P/Longmore falls outside of the bulk distribution because of its large eccentricity and inclination. Comet Shoemaker–Levy 9 impacted with Jupiter in 1994.
- Toth, I. (March 2006). "The quasi-Hilda subgroup of ecliptic comets - an update". Astronomy and Astrophysics 448 (3): 1191–1196. Bibcode:2006A&A...448.1191T. doi:10.1051/0004-6361:20053492.
- Spratt, Christopher E. (December 1989). "The Hilda group of minor planets". Journal of the Royal Astronomical Society of Canada 83: 393–404. Bibcode:1989JRASC..83..393S.