Comet 2012S1 ISON on early morning of Nov 14, 2013


Date & Time: Nov 13 2013, from 28:15 to 28:38 JST(+0900)
Composed 12 shots with 2min. 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...ISO3200




Date & Time: Nov 13 2013, from 28:15 to 28:37 JST(+0900)
Composed 8 shots with 3min. exposed
Optical: BORG 60ED with a conversion lens (f=297mm, F5.0)
with IDAS LPS-P1 Light-pollution suppression filter
Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Camera: Canon EOS 550D (Remodeled)
Location: Kujihama, Hitachi city, Ibaraki pref.

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


The comet 2012S1 ISON in that day has positioned at about 4 degrees south of gamma Vir. in eastern lower dawn skies. The comet had a sudden outburst and brightened from 7th to 6th magnitude for only two days, started to stretch an evolved ion tail. The comet ISON has already entered inside of the Venusian orbit, it's considered that the comet starts brisk activities. The length of ion tail can be estimated over 3 degrees from the second image.
  The 1st image: Cropped with an equivalent f=1350mm. (View angle: 0.94×0.63°)
  The 2nd image: Cropped with an equivalent f=400mm. (View angle: 3.19×2.13°)


2012S1 ISON on early morning of Nov 17, 2013
2012S1 ISON on early morning of Nov 12, 2013

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