Comet 2012S1 ISON on early morning of Nov 20, 2013


Date & Time: Nov 19 2013, from 28:45 to 29:00 JST(+0900)
Composed 15 shots with 1min. exposed
Optical: VIXEN 20cm(7.9") VISAC with a conversion lens (f=1278mm, F6.4)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Camera: Canon EOS 600D (Remodeled)
Location: Kujihama, Hitachi city, Ibaraki pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO1600
A lower image has emphasized with the rotational-gradient process




Date & Time: Nov 19 2013, from 28:40 to 29:01 JST(+0900)
Composed 20 shots with 1min. exposed
Optical: AF zoom-Nikkor ED 80-200mmF2.8 (f=200mm, F4.0)
Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Camera: Nikon D700
Location: Kujihama, Hitachi city, Ibaraki pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(2784×1848)
Device Size...DX format (24×16mm)
Sensitivity...ISO400, White Balance...Daylight


The comet ISON in that day could be observed in lower eastern dawn skies, about 6 degrees ESE of Spica with a brightness of 4th or 5th magnitude. Although the observed elevation was lower than 10 degrees, the image can detect several ionized streams stretched from the coma clearly. The comet ISON had the second outburst in the day, it was reported that the comet had brightened temporarily.
  The 1st image: Cropped with an equivalent f=1350mm. (View angle: 0.94×0.53°)
  The 2nd image: View angle: 6.86×4.56°


2012S1 ISON on early morning of Nov 22, 2013
2012S1 ISON on early morning of Nov 17, 2013

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