Sedna

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Sedna
Sedna is a large minor planet in the outer reaches of the Solar System that was, as of 2015, at a distance of about 86 astronomical units from the Sun, about three times as far as Neptune. For most of its orbit, it is even farther from the Sun than at present, with its aphelion estimated at 937 AU (31 times Neptune's distance), making it one of the most distant known objects in the Solar System other than long-period comets. Its surface is one of the reddest among Solar System objects. 90377 Sedna - Wikipedia, the free encyclopedia
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Short Description Sedna is a large minor planet in the outer reaches of the Solar System that was, as of 2015, at a distance of about 86 astronomical units from the Sun, about three times as far as Neptune. For most of its orbit, it is even farther from the Sun than at present, with its aphelion estimated at 937 AU (31 times Neptune's distance), making it one of the most distant known objects in the Solar System other than long-period comets. Its surface is one of the reddest among Solar System objects. 90377 Sedna - Wikipedia, the free encyclopedia
Discovered by Michael Brown, Chad Trujillo, David Rabinowitz
Discovery date 14 November 2003
Type TNO
Satellite of Sun
Minor planet number 90377
Orbit Prograde
Rotation Direct
Apoapsis 11 14 550 000 000 km
Periapsis 10 1 142 300 000 km
Semi-major axis 10 7 573 000 000 km
Distance from Sun 03 506.2 au
Eccentricity 0.854 91
Orbital period 11400 year
Orbital speed 01 1.04 km/s
Mean anomaly 358.163°
Inclination to the ecliptic 011.928 72°
Longitude of the ascending node 144.546°
Argument of periapsis 311.29°
Diameter/Size 04 1 060 ± 100 km
Mass 1021×1 kg
Density 01 2.0 g/cm3
Surface gravity  0.27 m/s2
Escape velocity 03 540 m/s
Rotation period 10.273 hour | 0.4280 day
Albedo geometric 0.32 ± 0.06
Temperature min 02  K
Temperature mean 02 12 K
Temperature max 02  K
Apparent magnitude 21.1
Absolute magnitude 1.83
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