4319 Jackierobinson ( 1981 ER14 ) is a main-belt asteroid discovered on March 1 , 1981 by Schelte J. Bus at Siding Spring Observatory . It was found during the U.K. Schmidt-Caltech Asteroid Survey . 4319 Jackierobinson ( 1981 ER14 ) is a main-belt asteroid discovered on March 1 , 1981 by Schelte J. Bus at Siding Spring Observatory in the course of the U.K. Schmidt-Caltech Asteroid Survey .