Daylight Photometry of C/2006 P1

摘要

On 2007 Jan. 15.479 UT, ten co-added 0.12-sec unfiltered CCD exposures of comet C/2006 P1 (McNaught) were taken by J. Srba and E. Brezina (Vsetin Observatory 6.3-cm f/8 Maksutov-Cassegrain telescope + SBIG ST-7 CCD camera + neutral-density filter; shielded to 120 square mm of active telescope area) during broad daylight, The CCD frames, which were processed using standard reduction procedures, were measured in a variety of circular apertures (centered on the central condensation of the coma) for brightness and were corrected for atmospheric extinction. The comparison object was Venus (assuming mag -3.9).