Comet Tuttle-Giacobini-Kresak on Apr 28, 2017

Date & Time: Apr 28 2017, from 25:11 to 25:32 JST(+0900)
Composed 8 shots with 3min. exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(4800×3200)
Device Size...DX format (24×16mm)
Sensitivity...ISO6400, White Balance...Daylight

The comet Tuttle-Giacobini-Kresak in that day has positioned in eastern Hercules, could be found out at 6.5 degrees northwest from Vega. The distance to the comet has kept close, you can detect a widely spread greenish coma in this image. The brightness can be estimated as 6th or 7th magnitude same with my previous observation.
  View angle: 0.84×0.56°

Comet Tuttle-Giacobini-Kresak on May 20, 2017

Comet Tuttle-Giacobini-Kresak on Apr 15, 2017

Copyright(c) 2017 by Naoyuki Kurita, All rights reserved.
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