| Diameter: 1000 miles (1,600 km) Distance from Sun: 486.0 AU Elliptical orbit of the Sun: 10,500 yrs Satellite: |
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| Discovered By: | Michael E. Brown, C. Trujillo, D. Rabinowitz | |
| Date of Discovery: | 14th November 2003 | |
| Average Distance from the Sun | ||
| Perihelion (closest) |
76.361 AU (q) 1.142 3×1013 m 11.423 Tm |
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| Aphelion (farthest) | 937 AU (Q) 1.402×1014 m 140.2 Tm 0.0148 ly |
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| Argument of Perihelion | 311.02° | |
| Semi-major Axis | 518.57 AU (a) 7.757 6×1013 m 77.576 Tm |
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| Eccentricity | 0.8527 | |
| Average Orbital Velocity | 1.04 km/s | |
| Mean Anomally | 197.634 27° | |
| Orbital Period | ~11,400yr | |
| Inclination (tilt) | 11.927° | |
| Longitude of Ascending Node | 1.44.26° | |
| Mean Radius | ||
| Mass | ~1 x 1021 kg | |
| Equatorial Surface Gravity | ~0.27 m/s2 ~12k |
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| Sidereal Rotation Period | 0.42 d (10 h) |
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| Albedo | 0.32 ± 0.06 | |
| Apparent Magnitude | 21.1 20.5 (Perihelic) |
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| Absolute Magnitude (H) | 1.83 ± 0.05 | |
| Angular Diameter | ||
| Temperature (Aphelion) (Perihelion) |
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| Spectra Data Atmosphere | (red) B-V=1.24; V-R=0.78 |
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| Category: | Sedna - eccentric orbit, as a scattered object or SDO (detached objects) largely a mixture of water, methane and nitrogen ices with tholins. Its surface is one of the reddest in the Solar System |
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