41p 20170316 hkato

The center of the condensation of the coma looked dark as a star nearby, GSC3435.5, mag. 13.18 on a 7-second exposure frame. Dust tail was still short toward 7 o'clock or south southeast. North is up, and East is to the left on the frame. - Earth distance: 0.162 AU Sun Distance: 1.109 AU The frame 2,604 x 1,732 pixels was cropped of the original 5,760 x 3,840 pixels, and it is comparable to a frame taken with a scope of the focal length 700mm. equipment: Takahashi FSQ-106ED, F3 Reducer 0.6x, and Canon EOS 5Dmk3-sp3, modified by Seo-san on Takahashi EM-200 Temma 2 Jr, autoguided at the center of the condensation of the coma of the comet with Takahashi FS-60C, StarlightXpress Lodester X2, and PHD Guiding 2 exposure: 7 times x 12 minutes, 4 x 4 min, 4 x 1 min, and 1 x 7 seconds at ISO 1,600 and f/3.0 The first exposure started at 10:22:37 March 16, 2017UTC. site: 968m above sea level at lat. 36 55 41 North and long. 140 16 15 East near the summit of Mt. Yamizo ??? in Ibaraki SQM-L was 21.02 at the night.

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