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Bruce Murray Space Image Library

Comet 19P/Borrelly, target of Deep Space 1

Comet 19P/Borrelly, target of Deep Space 1
Comet 19P/Borrelly, target of Deep Space 1 Deep Space 1 flew by comet 19P/Borrelly on September 22, 2001. NASA / JPL / Ted Stryk

It flew within 2,171 km of the nucleus at 22:29:33 UT. The nucleus is about 4 by 8 kilometers in size and incredibly dark, with an albedo varying from 0.01 to 0.03.