P/2019 LD2 (ATLAS)
Jupiter family comet / From Wikipedia, the free encyclopedia
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P/2019 LD2 (ATLAS) is a Jupiter-family comet discovered by the Asteroid Terrestrial-impact Last Alert System on 10 June 2019.[6][7] It was initially reported as the first known Jupiter trojan asteroid to display cometary activity,[8] but its classification as a Jupiter trojan was retracted after closer examination and a longer observation arc revealed its orbit to be unstable like a typical Jupiter family comet and implied that its position near the trojans is temporary.[1][9]
Quick Facts Discovery, Discovered by ...
Discovery [1] | |
---|---|
Discovered by | ATLAS-MLO |
Discovery site | Mauna Loa Obs. |
Discovery date | 10 June 2019 (first observed) |
Designations | |
2019 LD2 | |
Jupiter-family comet[1] periodic [2] centaur [3] | |
Orbital characteristics [1][4] | |
Epoch 27 July 2019 (JD 2458691.5) | |
Uncertainty parameter 4 | |
Observation arc | 2.00 yr (729 d) |
Earliest precovery date | 21 May 2018 |
Aphelion | 6.0774 AU |
Perihelion | 4.5784 AU |
5.3279 AU | |
Eccentricity | 0.14068 |
12.3 yr | |
339.529° | |
0° 4m 48.518s / day | |
Inclination | 11.517° |
180.217° | |
122.688° | |
Jupiter MOID | 0.0334843 AU |
TJupiter | 2.940 |
Physical characteristics | |
Mean diameter | ~14 km (assuming albedo of 0.12)[5] |
19.0[4] | |
12.20±0.83 (M1=6.9±0.8)[1] 12.1[4] | |
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