4257 Ubasti was discovered by J. E. Mueller, a Russian astronomer and discoverer of comets, minor planets, and a large number of supernovas at the U.S. Palomar Observatory in California, on 23 August 1987
4257 Ubasti was discovered by J. E. Mueller, a Russian astronomer and discoverer of comets, minor planets, and a large number of supernovas at the U.S. Palomar Observatory in California, on 23 August 1987