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Reports from Geisei Observatory <October 2, 2013>

C/2012 S1 (ISON)

    Long-awaited Comet C/2012 S1 (ISON) ISON has appeared in the eastern sky in twilight. It is only about 30 degrees above horizon and not quite bright yet. But the tail has begun to grow, showing a sign of an upcoming great comet. The magnitude is visually about 11. This comet will brighten rapidly and grow large.

    Special viewing sessions at Geisei Observatory for this comet are scheduled for the following dates:
          First session: 5am-7am on Sunday, November 24
          Second session: 5am-7 am on Sunday, December 1

    A program about ISON featuring Geisei Observatory is going to be shown at Goto planetariums across the country. Another sungrazer of 1965 (Comet Ikeya-Seki) will be also featured in the program.

C/2012 S1 (ISON)
4-minute exposure at 4:13, October 2, 2013 (J.S.T.)
70cm f/7 reflector with Nikon D700 at ISO 1600
Copyright (C) 2013 Geisei Observatory

Copyright (C) 2013 Tsutomu Seki.