(119979) 2002 WC19
| Discovery | |
|---|---|
| Discovered by | Palomar Observatory |
| Discovery date | November 16, 2002 |
| Designations | |
| MPC designation | (119979) 2002 WC19 |
| Twotino[1][2] | |
| Orbital characteristics [4] | |
| Epoch JD 2457000.5 (9 December 2014) (uncertainty=3) |
|
| Aphelion | 60.94 AU |
| Perihelion | 35.361 AU |
| 48.151 AU | |
| Eccentricity | 0.26564 |
| 334.13 yr (122,042 d) | |
| 315.34° | |
| Inclination | 9.1685° |
| 109.7742° | |
| 43.75° | |
| Known satellites | 1 (≈ 127 km)[3] |
| Physical characteristics | |
| Dimensions | ≈ 440 km (assumed)[3] |
| Albedo | 0.07 (expected from theory)[5] |
| 4.9 (combined system) | |
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(119979) 2002 WC19, also written as (119979) 2002 WC19, is a twotino, i.e. it is in a 1:2 orbital resonance with Neptune. It was discovered on November 16, 2002 at the Palomar Observatory. It is probably a dwarf planet.[5]
Knowing how many twotinos there are may reveal whether Neptune took roughly 1 million or 10 million years to migrate about 7 AU from its birth location.[6]
Satellite
A natural satellite was reported to be orbiting (119979) 2002 WC19 on February 27, 2007. It is estimated to be 2,760 ± 250 km from the primary and to be around 139 kilometres (86 mi) in diameter.[3]
References
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- Orbital simulation from JPL (Java)
- Ephemeris
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- ↑ 5.0 5.1 Mike Brown, How many dwarf planets are there in the outer solar system?
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