While estimates of the mass ejected by a large, Borealis-size impact vary, simulations suggest that a body approximately 0.02 Mars masses (~0.002 Earth Masses) in size is capable of producing a sizable debris disk in Martian orbit, on the order of 5x1020 kg, with a significant fraction of the material remaining close to Mars.[1][8] This figure lies within the estimated mass range necessary to form the two moons, as other data suggests that only 1% of the mass of an accretion disk successfully forms moons.[8] There are several other large impact basins on Mars that could have ejected enough debris to form the moons.[8]