25725 99 023B 2701 G 20071026104809500 17 25 0611357-154730 56 R 003800 25725 99 023B 2701 G 20071026104833540 17 25 0623630-150003 87 R 003800 25725 99 023B 2701 G 20071026104907790 17 25 0641244-134910 57 R 003800 IOD format: http://www.satobs.org/position/IODformat.html 99- 23 B 07-10-26 10:52:06.3 TJM 68.3 0.5 18 3.8 +6.0->inv PPAS format: http://www.satobs.org/tumble/flashpm.html#PPASformat Site 2701: 43.68764 N, 79.39243 W, 230 m Comet 17P/Holmes was easily seen with the unaided eye, located near 03:52, +50.2, making a right-triangle with alpha and delta Persei. As seen with the unaided eye, at first glance it appeared stellar, but careful observation revealed a hint of fuzziness, which I would not have noticed had I not known this to be a comet. The comet was brighter than the mag 3.0 delta Persei, and fainter than the mag 1.9 alpha Persei; I estimate roughly mag 2.5. In 25x100 binoculars, the comet's core was bright and elongated, located a little off centre within a coma of about 0.1 deg diameter (estimated relative a pair of similarly spaced stars in the FOV). The outer edge of the coma appeared to be sharply defined; there was no sign of a tail. At its present distance from Earth, about 1.63 A.U., its apparent angular diameter of about 0.1 deg implies a linear diameter of about 400,000 km. Ted Molczan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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