1993 SB
1993 SB information Average distance from Sun: 5856200000 km (39.1457 AU) Perihelion (closest): 3997100000 km Perihelion (farthest): 7715100000 km Equatorial radius: 65 km (Diameter: 130 km) Mass: 2000000000 kg Density: 2 g/cm³ Equatorial surface gravity: 0.04 m/s² Escape velocity: 70 m/s Siderial orbit period (length of year): 89461 earth days Mean orbit velocity: 4640 m/s Orbital eccentricity: 0.317 Orbital inclination to ecliptic: 1.9 degrees Equatorial inclination to orbit: 335.2 degrees Surface temperature (min/max): 44 K		1993 SB, Sun
1993 SB 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
More Discovered by Iwan P. Williams, Alan Fitzsimmons, and Donal O'Ceallaigh in September 16, 1993
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