Shape an asteroid!!!

I want to make an asteroid polygon...

1946.3 meters across! 30882891613 m^3, 79.63 billion tonnes and 1190.06 hectares, or about 2975 acres.
84.49 % carbon
8.37 % rock
4.51 % rock
2.35 % metal
0.14 % rock
remainder: 0.02 %