* ベネット彗星 (C/1969 Y1) *
John Caister Bennett (Pretoria, South Africa) discovered this comet on December 28.82, 1969, after only 15 minutes of beginning one of his routine comet sweeping sessions. Although he had began searching for comets as early as 1960, systematic searches were not began until January 1967, and since this latter date Bennett had spent 333.5 hours looking for comets. Bennett estimated the magnitude as 8.5. He described the comet as small and diffuse, with no sign of tail. The comet was then situated 1.70 AU from Earth and 1.68 AU from the sun. |
1970年04月05日