(15788) 1993 SB
From Infogalactic: the planetary knowledge core
|
|
| Discovery[1] | |
|---|---|
| Discovered by | Iwan P. Williams, Alan Fitzsimmons, and Donal O'Ceallaigh La Palma (950) |
| Discovery date | September 16, 1993 |
| Designations | |
| none | |
| Plutino[2][3] | |
| Orbital characteristics | |
| Epoch March 6, 2006 (JD 2453800.5) | |
| Aphelion | 7,715.1 Gm (51.572 AU) |
| Perihelion | 3,997.1 Gm (26.719 AU) |
| 5,856.2 Gm (39.146 AU) | |
| Eccentricity | 0.317 |
| 89,461 d (244.93 a) | |
|
Average orbital speed
|
4.64 km/s |
| 335.2° | |
| Inclination | 1.9° |
| 354.9° | |
| 79.5° | |
| Physical characteristics | |
| Dimensions | 130? km |
| Mass | ~2×1018 kg |
|
Mean density
|
2.0? g/cm³ |
| ~0.04 m/s² | |
| ~0.07 km/s | |
|
Sidereal rotation period
|
? d |
| Albedo | 0.09? |
| Temperature | ~44 K |
|
Spectral type
|
? |
| 7.7 | |
(15788) 1993 SB is a trans-Neptunian object of the plutino class. Apart from Pluto, it was one of the first such objects discovered (beaten by two days by (385185) 1993 RO and by one day by 1993 RP), and the first to have an orbit calculated well enough to receive a number.[2] The discovery was made in 1993 at the La Palma Observatory with the Isaac Newton Telescope. Very little is known about the object. Even the diameter estimate of ~130 km is based on an assumed albedo of 0.09.[4]
References
External links
- MPEC: recovery of the object
- list of known TNOs, including size estimates
- IAU minor planet lists
- Orbital simulation from JPL (Java) / Ephemeris
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