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Sedna at Caltech
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Sedna
Designation
2003 VB12
Discoverer(s)
M.Brown, C. Trujillo, D. Rabonowitz
Discovery Date
14 November 2003
Name Origins
Inuit Goddess of the Underworld
Category
Trans-Neptunian
Eccentricity
0.849
Semi-major axis ( AU )
75104.117 GM ( 502.040 AU )
Periphelion
11374.298 GM (76.032 AU)
Aphelion
138833.936 GM (928.048 AU)
Orbit Period ( days )
4108714.108 d (11249.05 a)`
Mean Orbital Speed
1.04 Km/s
Inclination ( degs )
11.932
Longitude Of Ascending Node
144.544
Argument of Periphelion
311.468
Mean Anomoly
357.713
Mass
1.7-6.1x10^21 Kg
Density
2.0 g/cm2
Surface Gravity
0.33-0.50 m/s2
Escape Velocity
0.62 - 0.95 Km/s
Rotation Period
0.42 d (10 h)
Spectral Class
Unknown
Absolute Magnitude
1.6
Albedo
0.2
Mean Surface Temperature
-12 K
Picture + Data Source
N.A.S.A./Wikipedia
