Original: Its orbit lies too far from Vesta for it to actually be a member of the Vesta family It is not clear how it arrived at an orbit so far from Vesta , but other examples of V-type asteroids fairly far from their parent body are known .
Simplified: It takes 15.4 hours to orbit each other , which says that the binary is very close -- the separation being of the order of 10-20 km , if normal asteroid albedo and density values are assumed .