C-type asteroid
The largest unequivocally C-type asteroid is 10 Hygiea, although the SMASS classification places the largest asteroid, 1 Ceres, here as well, because that scheme lacks a G-type.
Veneneia
Veneneia ( ) is the second-largest crater on asteroid 4 Vesta, at 52°S latitude. in diameter, it is 70% of the equatorial diameter of the asteroid, and one of the largest craters in the Solar System. It is at least 2 billion years old. However, it is overlain and partially obliterated by the even larger Rheasilvia. It was discovered by the "Dawn" spacecraft in 2011. It is named after "Venēneia", one of the founding vestal virgins.