What is the mass of the largest asteroid?

Answer 1

(The total mass the asteroid belt is lighter than the moon. The total mass the asteroid belt is lighter than the moon.)

However;

If the total mass of the asteroid belt were reconstituted, it would altogether be less than half of the mass of the moon. But if we consider that if the hot molten interior of a hypothesized planet that might have been the asteroid belt was under great pressure and heat, as are all of the known planets, we could then hypothesize that approximately 90+% of the mass of said hypothesized planet would have been expanded by a factor of at least 1600:1. Possibly more if the interior was superheated. That figure is only if the matter of the interior had the matter weight and density of water. If it were denser, having the same density of magma, then the rate of expansion would be much greater. Possibly as much as 12000:1. So if you take this into consideration, then the asteroid belt could indeed have had a total mass great enough to compete with one of the terrestrial planets

Answer 2

The dwarf planet Ceres is by far the most massive asteroid, constituting nearly 1/3 of the total mass of the asteroid belt : 9.43 x 1020 kg (about 1 quintillion tonnes).

This is, however, only 1/70th the mass of Earth's Moon.

The next largest asteroids are

Vesta (about 1/4 the mass of Ceres at 2.59 x 1020 kg)

Pallas (about 1/5 the mass of Ceres at 2.11 x 1020 kg)

Answer 3

The largest asteroid is Ceres, which has a mass of about 9.39 x 10^20 kilograms.