2785 Sedov (1978 QN2) is a main-belt asteroid discovered on August 31
1978 by N
Chernykh at Nauchnyj
Asteroids (from Greek 'star' and 'like
In form') are a class of Small Solar System Bodies in orbit around the Sun
They have also been called planetoids
Especially the larger ones
These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disk of a planet and was not observed to have the characteristics of an active comet
But as small objects in the outer Solar System were discovered
Their volatile-based surfaces were found to more closely resemble comets