The shapes were probably just "a play of light and shadow," study author Gabriel G. De la Torre.
Scientists say the Iowa-sized object in the asteroid belt has a surface composition similar to Ceres.
Matthew Nicholson, 28, shot two rounds into the wall, then shot his mother in the head.
The meteorites may have come from a potentially habitable asteroid.
NASA released a new video simulating a fly by of Ceres, based on images taken by its Dawn spacecraft.
A signal from NASA's Dawn confirming the first-ever successful entry into orbit of a dwarf planet came back at 8:36 a.m. on Friday.
NASA "did not expect to be this puzzled" by the appearance of two reflective lights on the protoplanet.