Career
From 2000 - 2015 he worked at the Harvard-Smithsonian Center for Astrophysics as director of the Minor Planet Center, has discovered numerous asteroids and is credited as a co-discoverer of one satellite of Jupiter (Callirrhoe) and one of Saturn (Albiorix). He also discovered two periodic comets: (171P/Spahr, P/1998 U4). He is an avid birdwatcher.
Asteroid 2975 Spahr was named after him.
