(15788) 1993 SB
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Discovery[1]
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| Discovered by | Iwan P. Williams, Alan Fitzsimmons, and Donal O'Ceallaigh La Palma (950) |
| Discovery date | September 16, 1993 |
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Designations
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| Alternate name(s) | none |
| Minor planet category |
Plutino[2][3] |
| Epoch March 6, 2006 (JD 2453800.5) | |
| Aphelion | 7,715.1 Gm (51.572 AU) |
| Perihelion | 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) |
| Average orbital speed | 4.64 km/s |
| Mean anomaly | 335.2° |
| Inclination | 1.9° |
| Longitude of ascending node | 354.9° |
| Argument of perihelion | 79.5° |
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Physical characteristics
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| 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 (H) | 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 an assumed albedo of 0.09.[4]
[edit] References
- ^ "MPEC 1993-S09: 1993 SB". IAU Minor Planet Center. 1993-09-22. http://www.minorplanetcenter.org/mpec/J93/J93S09.html. Retrieved 2010-02-20.
- ^ "MPEC 2010-B62 :Distant Minor Planets (2010 FEB. 13.0 TT)". Minor Planet Center. 2010-01-30. http://www.minorplanetcenter.org/mpec/K10/K10B62.html. Retrieved 2010-02-20.
- ^ Marc W. Buie (1999-11-10 using 45 of 50 observations). "Orbit Fit and Astrometric record for 15788". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/15788.html. Retrieved 2010-02-20.
- ^ Wm. Robert Johnston. "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 24 November 2005. http://web.archive.org/web/20051124045541/http://johnstonsarchive.net/astro/tnoslist.html. Retrieved 2006-02-07.
[edit] 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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