(157258) Leach = 2004 RL165 Sidney ("Sid") Leach (b. 1951) and Gloria Leach (b. 1958) have spread their enthusiasm for astronomy around young people for years in schools and public events. Sid serves as president of the U.S. National Sharing the Sky Foundation, and Gloria plans his travels for astrophotography across the northern and southern hemispheres.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.