Every world / Dwarf planet

Sedna

Outline The numbers here are measured. The rest of this page is being written.

The path of Sedna round the Sun, seen from above and drawn to scale, with the white dot at its nearest point. The faint rings are the paths of Mercury, Venus, the Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Orbit from NASA/JPL Small-Body Database.

Kind: Dwarf planet
Distance: 543.7 au from the Sun on average
Once round: 12,679 years
Path: a long oval (eccentricity 0.86), tilted 11.9°
Size: 995 km across

The Sun On the atlas In 3D

Still being written

What it looks like
What it is made of
How it was found and named
Its moons, if any
What is still unknown

Sources: NASA/JPL Small-Body Database; Pál et al. 2012, Astronomy & Astrophysics 541, L6 (heat measured by the Herschel telescope).