In his time at Space Telescope, Griffin contributed to the observation and study of a scientifically significant binary asteroid system, known as 1998 WW31.[6] This was only the second such binary system discovered in the Kuiper belt (the other being the Pluto and Charon system) and provided valuable data helping astronomers understand the mass and behaviour of objects in the Kuiper belt.[7]
Via search programmes using small telescopes, Griffin also discovered 26 numbered minor planets between 1998 and 2001.[5] Three of his discoveries were made in collaboration with Australian astronomer Nigel Brady. His discovery include:
However the Mars-crossing asteroid 4995 Griffin is unrelated to him, as it was named after Griffin Swanson the son of its discoverer Steven Roger Swanson.[11]