Asteroid 15609, Kosmaczewski, was discovered on April 7, 2000 by the Lincoln Laboratory Near-Earth Asteroid Research (LINEAR) Team at Socorro, New Mexico. It has a period of 3 years, 155 days and is about 2 1/2 miles in diameter.
It was named for Hamden, Connecticut middle school student Sara Guckian Kosmaczewski (born 1987), who was a finalist in the 2001 Discovery Young Scientist Challenge (DYSC) science competition.
Sara Kosmaczewski
The meaning of asteroid Kosmaczewski seems to be: having to do with the cosmic; possibly also, biotechnology.