Vanth will be Orcus' moon

[h2ouniverse]

Mike Brown has chosen "Vanth" as the name of Orcus' moon.

http://www.mikebrownsplanets.com/2009/0 ... orcus.html

Vanth, at about 250-300km should be the second or third largest transneptunian moon after Charon (1200km) and possibly Hi'iaka (about 300km too).

The IAU has yet to approve the name but it is unlikely that they refuse it.

The main transneptunian systems should now be all named:
Eris+Dysnomia
Pluto+Charon+Nix+Hydra
Haumea+Hi'iaka+Namaka
Quaoar+Weywot (to be confirmed)
Orcus+Vanth