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Planet Sedna | ||||
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On
Sedna is currently
located around 90 AUs from our Sun, Sol -- an orbital distance that is roughly
three times
farther out than that of Pluto or Neptune -- but will eventually
move as much as 10 times farther away (around
990 AUs) in a 12,260-year orbit
around Sol; it's orbital semi-major axis is around 532 AUs with an extremely
high eccentricity of 0.857.
Based on its current distance, brightness, and presumed albedo or ability to reflect light, Sedna has been estimated to have more than half the diameter of Pluto and may be larger than any other planetary body found since Pluto -- at 730 to 1,470 miles or 1,180 to 2,360 kilometers (km) across, compared to Pluto's diameter of around 1,440 miles or 2,320 km.
Location of Sedna
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