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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.
One particularly distant body is 90377 Sedna, which was discovered in November 2003.It has an extremely eccentric orbit that takes it to an aphelion of 937 AU. [2] It takes over 10,000 years to orbit, and during the next 50 years it will slowly move closer to the Sun as it comes to perihelion at a distance of 76 AU from the Sun. [3] Sedna is the largest known sednoid, a class of objects that ...
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.
Sedna is a trans-Neptunian object with the asteroid number 90377. It was discovered on November 14, 2003 by astronomers Michael Brown , Chad Trujillo , and David Rabinowitz . Sedna is currently 88 Astronomical units (AU) from the Sun , which is three times the distance between Neptune and the Sun. Sedna's orbit is an ellipse and its aphelion is ...
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.
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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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 .