Talk:20461 Dioretsa

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"It is one of two known objects in the solar system that has a retrograde orbit"

um ... certainly not. Perhaps one of two *named* objects - although I don't know that that 2nd one is. There are multiple comets and even a few numbered minor planets. Any body with inclination > 90 is technically in a "retrograde orbit". See Dioretsa's many companions here:

http://cfa-www.harvard.edu/iau/lists/Others.html

'... All planets and most smaller bodies orbit the Sun counterclockwise as seen from a position above the Sun's north pole. The exceptions are mostly comets, which generally have highly disturbed orbits. ...'

- http://en.wikipedia.org/wiki/Retrograde_orbit#Retrograde_orbits