(158589) Snodgrass = 2002 MQ4 Colin Snodgrass (b. 1981) is an astronomer at the European Southern Observatory. His work centers on the characterization of inactive cometary nuclei through photometry, measuring their sizes, colors and rotation periods. He is also active in observing exoplanetary systems.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.