Comet 2012S1 ISON on early morning of Nov 2, 2013


Date & Time: Nov 1 2013, from 28:22 to 28:44 JST(+0900)
Composed 6 shots with 3min. exposed
Optical: VIXEN 20cm(7.9") VISAC with a conversion lens (f=1278mm, F6.4)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Nikon D700
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(2784×1848)
Device size...DX format (24×16mm)
Sensitivity...ISO3200, White Balance...Daylight




The comet 2012S1 ISON in that day has positioned around a hind leg of Leo, a degree west of sigma Leonis in lower dawn eastern skies. Unfortunately it was thin cloudy weather condition, but the image can show a bit clearer coma with 9.5th magnitude in brightness. And the comet has a dust tail with a length of about 20 arc minutes, looks gradually getting longer and longer.
(View angle: 1.05×0.7°)





2012S1 ISON on early morning of Nov 6, 2013

2012S1 ISON on early morning of Oct 27, 2013


Copyright(c) 2013 by Naoyuki Kurita, All rights reserved.
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