1996 PW
1996 PW is an exceptionally eccentric trans-Neptunian object and damocloid on an orbit typical of long-period comets but one that showed no sign of cometary activity around the time it was discovered. The unusual object measures approximately 10 kilometers (6 miles) in diameter and has a rotation period of 35.4 hours and likely an elongated shape.
Discovery images of 1996 PW from NEAT-GEODSS in August 1996 | |
| Discovery | |
|---|---|
| Discovered by | NEAT |
| Discovery site | Haleakala Obs. |
| Discovery date | 9 August 1996 |
| Designations | |
MPC designation | 1996 PW |
Minor planet category | TNO · damocloid distant · unusual |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 1.39 yr (506 d) |
| Aphelion | 504.23 AU |
| Perihelion | 2.4933 AU |
Semi-major axis | 253.36 AU |
| Eccentricity | 0.9902 |
Orbital period (sidereal) | 4033 yr (1,473,017 d) |
Mean anomaly | 2.0281° |
Mean motion | 0° 0m 0.72s / day |
| Inclination | 29.956° |
Longitude of ascending node | 144.38° |
| 181.60° | |
| TJupiter | 1.7130 |
| Physical characteristics | |
Mean diameter | 7 km 8 km (est. at 0.15) 15 km (est. at 0.04) |
Synodic rotation period | 35.44 h |
| Ld (SMASS) D B–R = 0.56±0.04 V–I = 1.03±0.06 V–J = 1.80±0.05 V–H = 2.19±0.05 V–K = 2.32±0.05 | |
| 14.0 | |
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