Comet 2016U1 NEOWISE on early morning of Dec 31, 2016


Date & Time: Dec 30 2016, from 29:25 to 29:35 JST(+0900)
Composed 5 shots with 2min. exposed
Optical: TAKAHASHI 12.5cm(4.9") Fluorite refractor with a conversion lens (f=710mm, F5.7)
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO1600




This image shows the comet 2016U1 NEOWISE positioned at central region of Ophiuchus in lower eastern dawn skies. You can see a greenish blued coma without tails. The comet will close to the sun from now on, unfortunately the observation consition will be poor.
  The image has been cropped with an equivalent f=1000mm (View angle: 1.27×0.85°)





Comet 2015V2 Johnson on early morning of Dec 24, 2016

Comet 252P LINEAR on May 1, 2016


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