The activity and size of the nucleus of Comet Hale-Bopp (C/1995 O1) Weaver, H. A. ; Feldman, P. D. ; A'Hearn, M. F. ; Arpigny, C. Abstract Publication: Science Pub Date: March 1997 DOI: 10.1126/science.275.5308.1900 Bibcode: 1997Sci...275.1900W