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Sedna (minor-planet designation: 90377 Sedna) is a dwarf planet in the outermost reaches of the Solar System, orbiting the Sun beyond the orbit of Neptune. Discovered in 2003, the planetoid's surface is one of the reddest known among Solar System bodies.
These four panels show the location of trans-Neptunian object 90377 Sedna, which lies in the farthest reaches of the Solar System. [1] Each panel, moving clockwise from the upper left, successively zooms out to place Sedna in context. The first panel shows the orbits of the inner planets and Jupiter; and the asteroid belt.
The NASA image is not the same as the uploaded image (note the bright object to the left of Sedna is below Sedna in the NASA image(s), but well above it in the uploaded image). The uploaded image is from Caltech and, as the source is a direct link to the image itself (a problem in itself), there's no authorship attribution.
Polski: Orbita (potencjalnej) planety karłowatej 90377 Sedna (czerwona) w porównaniu z orbitami planet zewnętrznych i Plutona, bez podpisu. English: The orbit of dwarf planet candidate 90377 Sedna (red) compared to the outer planets and Pluto, without caption.
90377 Sedna, a large trans-Neptunian object, had the provisional designation 2003 VB 12, meaning it was identified in the first half of November 2003 (as indicated by the letter "V"), and that it was the 302nd object identified during that time, as 12 cycles of 25 letters give 300, and the letter "B" is the second position in the current cycle.
90377 Sedna is a trans-Neptunian object currently about three times as far from the Sun as Neptune. For the majority of its orbit it is the most distant known object in the Solar System other than long-period comets .
The Oschin Telescope was responsible for the discovery of 90377 Sedna on 2003-11-14 and Eris, the "10th Planet" on 2005-01-05 from images taken 2003-10-21. The peculiar Type Ia supernova SN 2002cx was discovered with the Oschin telescope on 2002-05-12, 21 UT. [ 7 ]
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