Astronomy_1_worksheet_4_part_19 - Figure 19 - Sedna 1. In...

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Figure 19 - Sedna 1. In 2002, the Palomar Observatory on Earth and the Hubble Space Telescope detected and photographed another object ½ the size of Pluto, orbiting the Sun in the Kuiper belt far beyond Pluto’s orbit. It official name is Quaoar, which is the name of a Native American god. Quaoar is too far away and little is known about it yet. It too is conjectured to be cold, dark, icy and lonely. 2. In November 2003, yet another Kuiper Belt object was discovered even larger than Quaoar . It has been named Sedna , after an Inuit God of the Arctic. Sedna is estimated to be 9/10 ths the size of Pluto. It is spherical, reddish and probably rocky and covered with ice. We don’t yet know at what speed it rotates on its axis. Its orbit is highly elliptical, varying from 80 au at perihelion (its closest distance to the Sun) to over 900 au at aphelion (its farthest distance from the Sun). It period takes a whopping 10,500 years to orbit the Sun just once. We believe it is -420° F on Sedna
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This note was uploaded on 03/06/2010 for the course ASTRONOMY astronomy taught by Professor Moth during the Fall '09 term at California State University , Monterey Bay.

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Astronomy_1_worksheet_4_part_19 - Figure 19 - Sedna 1. In...

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