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P/2010 LH155

Adrien Coffinet All Messages By This Member #33643 Hi all, MPEC 2025-H69 has just announced P/2010 LH155, a Jupiter-family comet whose current observations are its third observed opposition. It looks like this object was inactive in 2010 and 2018, and has only been active at the current opposition. It makes me wonder if it's an actual comet, or an object that had an outburst for some reason (rotational breakup, collision, ...). It has regular close approaches with Jupiter (1940, 1998, 2023, 2058, 2117, 2141, 2176, 2200), but the only recent one was at 0.95 au in 2023, and it slightly shortened its perihelion but not dramatically, so it is unlikely to be the trigger of this cometary activity. Orbital parameters at perihelion: Epoch=Tp / a (au) / e / i (°) / q (au) 2010-02-18 / 3.88 / 0.38 / 8.3 / 2.39 2017-09-30 / 3.87 / 0.39 / 8.3 / 2.37 2025-04-09 / 3.74 / 0.51 / 8.8 / 2.22
Adrien Coffinet All Messages By This Member #33644 * last line, it's e = 0.41 and not 0.51 toggle quoted message Show quoted text Le mar. 22 avr. 2025, 19:07, Adrien Coffinet via <adrien.coffinet2=[email protected]> a écrit?: Hi all, MPEC 2025-H69 has just announced P/2010 LH155, a Jupiter-family comet whose current observations are its third observed opposition. It looks like this object was inactive in 2010 and 2018, and has only been active at the current opposition. It makes me wonder if it's an actual comet, or an object that had an outburst for some reason (rotational breakup, collision, ...). It has regular close approaches with Jupiter (1940, 1998, 2023, 2058, 2117, 2141, 2176, 2200), but the only recent one was at 0.95 au in 2023, and it slightly shortened its perihelion but not dramatically, so it is unlikely to be the trigger of this cometary activity. Orbital parameters at perihelion: Epoch=Tp / a (au) / e / i (°) / q (au) 2010-02-18 / 3.88 / 0.38 / 8.3 / 2.39 2017-09-30 / 3.87 / 0.39 / 8.3 / 2.37 2025-04-09 / 3.74 / 0.51 / 8.8 / 2.22

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