Quasi-Hilda comet

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°.^[1] Comets can be temporarily perturbed into this group and then perturbed back out again.^[2] Eight percent of the comets that leave the 3:2 resonance end up impacting Jupiter.^[1]

Known quasi-Hilda comets

These numbered comets belong to the group of quasi-Hilda comet:^[1]

Full Name	Aphelion (Q)	Eccentricity	Inclination	Perihelion date
36P/Whipple	5.27	0.261	9.92	2011-12-29
74P/Smirnova–Chernykh	4.78	0.147	6.65	2009-07-26
82P/Gehrels	4.65	0.122	1.12	2010-01-12
111P/Helin–Roman–Crockett	4.61	0.140	4.23	2013-01-30
117P/Helin–Roman–Alu	5.13	0.253	8.69	2014-03-28
129P/Shoemaker–Levy	4.85	0.170	3.29	2014-02-07
135P/Shoemaker–Levy	4.93	0.289	6.05	2014-11-01
147P/Kushida–Muramatsu	4.85	0.276	2.36	2008-09-22
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
212P/NEAT (2000 YN30)[3]	6.20	0.579	22.4	2008-12-03
362P/(457175) 2008 GO98[4]	5.08	0.279	15.6	2024-07-20
282P/(323137) 2003 BM80[5]	5.04	0.188	5.81	2021-10-24

39P/Oterma was a quasi-Hilda before a close approach to Jupiter in 1963.^[1] 77P/Longmore falls outside of the bulk distribution because of its large eccentricity and inclination.^[1] Comet Shoemaker–Levy 9 impacted with Jupiter in 1994.

Not numbered comets claimed to be quasi-Hilda object with comet activity are P/2010 H2 (Vales),^[6] 2009 DQ118,^[7] 2018 CZ₁₈^[8] and 2004 CV₅₀.^[9]