41p 20170304 hkato

41P/Tuttle-Giacobini-Kresak in Leo March 4, 2017 The comet got bigger and brighter significantly compared to a week before. The green coma looks to be extended about one degree including very faint part. It means that the green circle is comparable to 70% of the diameter of the orbit of Moon around Earth. There looks to be a short dust tail toward the south. North is up, and East is to the left. Earth distance: 0.205 AU Sun Distance: 1.174 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 a star nearby with Takahashi FS-60C, StarlightXpress Lodester X2, and PHD Guiding 2 exposure: 6 times x 8 minutes, 3 x 4 min, and 3 x 1 minute at ISO 1,600 and f/3.0 The first exposure started at 15;52;57 March 4, 2017UTC. site: 1,154m above sea level at la. 35 24 25 North and long. 138 38 25 East near Mt. Fuji SQM-L was 21.39 at the night.

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