(15788) 1993 SB
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| Discovery | |
|---|---|
| Discovered by: | Iwan P. Williams, Alan Fitzsimmons, and Donal O'Ceallaigh |
| Discovery date: | September 16, 1993 |
| Alternative names: | none |
| Minor planet category: | Plutino |
| Orbital characteristics | |
| Epoch March 6, 2006 (JD 2453800.5) | |
| Aphelion distance: | 7,715.1 Gm (51.572 AU) |
| Perihelion distance: | 3,997.1 Gm (26.719 AU) |
| Semi-major axis: | 5,856.2 Gm (39.146 AU) |
| Eccentricity: | 0.317 |
| Orbital period: | 89,461 d (244.93 a) |
| Avg. orbital speed: | 4.64 km/s |
| Mean anomaly: | 335.2° |
| Inclination: | 1.9° |
| Longitude of ascending node: | 354.9° |
| Argument of perihelion: | 79.5° |
| Physical characteristics | |
| Dimensions: | 130? km |
| Mass: | ~2×1018 kg |
| Mean density: | 2.0? g/cm³ |
| Equatorial surface gravity: | ~0.04 m/s² |
| Escape velocity: | ~0.07 km/s |
| Sidereal rotation period: | ? d |
| Albedo: | 0.09? |
| Temperature: | ~44 K |
| Spectral type: | ? |
| Absolute magnitude: | 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 1993 RO and by one day by 1993 RP), and the first to have an orbit calculated well enough to receive a number. 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 the guess of an albedo of 0.09 [1].
[edit] External links
- First MPEC listing
- MPEC: recovery of the object
- list of known TNOs, including size estimates
- IAU minor planet lists
| Minor planets | ||
|---|---|---|
| Previous minor planet | (15788) 1993 SB | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
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