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483P/PanSTARRS
Pair of active asteroids / From Wikipedia, the free encyclopedia
483P/PanSTARRS (provisional designation P/2016 J1) is a pair of active main-belt asteroids that split apart from each other in early 2010. The brightest and largest component of the pair, P/2016 J1-A, was discovered first by the Pan-STARRS 1 survey at Haleakalā Observatory on 5 May 2016. Follow-up observations by the Canada-France-Hawaii Telescope at Mauna Kea Observatory discovered the second component, P/2016 J1-B, on 6 May 2016.[9] Both asteroids are smaller than 1 kilometre (0.62 mi) in diameter, with P/2016 J1-A being roughly 0.6 km (0.37 mi) in diameter and P/2016 J1-B being roughly 0.3 km (0.19 mi) in diameter.[7]: 18 The two components recurrently exhibit cometary activity as they approach the Sun near perihelion, suggesting that their activity is driven by sublimation of volatile compounds such as water.[7]
![]() Canada-France-Hawaii Telescope image of split asteroid pair P/2016 J1 on 6 May 2016, showing comet-like tails on both components | |
Discovery[1] | |
---|---|
Discovered by | Pan-STARRS 1 |
Discovery site | Haleakalā Observatory |
Discovery date | 5 May 2016 |
Designations | |
P/2016 J1 (PanSTARRS) | |
Orbital characteristics (fragment A)[2] | |
Epoch | 21 June 2016 (JD 2457560.5) |
Observation arc | 153 days (A)[2] 140 days (B)[3] |
Earliest precovery date | 4 March 2016[2] |
Orbit type | main-belt (outer)[4] · Encke-type[2][3] · periodic[5][6] |
Aphelion | 3.896 AU |
Perihelion | 2.448 AU |
Semi-major axis | 3.172 AU |
Eccentricity | 0.2283 |
Orbital period | 5.65 yr (2,064 days) |
Inclination | 14.330° |
199.856° | |
Argument of periapsis | 46.585° |
Last perihelion | 24 June 2016[2] |
TJupiter | 3.113 |
Earth MOID | 1.461 AU |
Jupiter MOID | 1.227 AU |
Physical characteristics | |
Mean diameter | <0.62+0.18 −0.10 km (A)[7]: 18 <0.34+0.12 −0.06 m (B)[7]: 18 |
0.04 (assumed)[4] | |
C/G[8] B–V = 0.74±0.04 (A)[8] B–V = 0.74±0.12 (B)[8] V–R = 0.36±0.04 (A)[8] V–R = 0.39±0.12 (B)[8] | |
Comet total magnitude (M1) | 16.4±0.4 (A)[2] 17.3±0.8 (B)[3] |
Comet nuclear magnitude (M2) | >19.95+0.18 −0.16 (A)[7]: 18 >21.26+0.23 −0.26 (B)[7]: 18 |