(15788) 1993 SB
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| Discovery A | |
|---|---|
| Discoverer | Iwan P. Williams, Alan Fitzsimmons, and Donal O'Ceallaigh |
| Discovery date | September 16, 1993 |
| Alternate designations B | none |
| Category | Plutino |
| Orbital elements C | |
| Eccentricity (e) | 0.317 |
| Semi-major axis (a) | 5,856.2 Gm (39.146 AU) |
| Perihelion (q) | 3,997.1 Gm (26.719 AU) |
| Aphelion (Q) | 7,715.1 Gm (51.572 AU) |
| Orbital period (P) | 89,461 d (244.93 a) |
| Mean orbital speed | 4.64 km/s |
| Inclination (i) | 1.9° |
| Longitude of the ascending node (Ω) | 354.9° |
| Argument of perihelion (ω) | 79.5° |
| Mean anomaly (M) | 335.2° |
| Physical characteristics D | |
| Dimensions | 130? km |
| Mass | ~2×1018 kg |
| Density | 2.0? g/cm³ |
| Surface gravity | ~0.04 m/s² |
| Escape velocity | ~0.07 km/s |
| Rotation period | ? d |
| Spectral class | ? |
| Absolute magnitude | 7.7 |
| Albedo (geometric) | 0.09? |
| Mean surface temperature | ~44 K |
(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 | ||
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| Previous minor planet | (15788) 1993 SB | Next minor planet |
| Small Solar System bodies |
|---|
| 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. |
