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


Date & Time: Nov 11 2013, from 28:00 to 28:20 JST(+0900)
Composed 10 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 11 2013, from 28:03 to 28:19 JST(+0900)
Composed 6 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 2 degrees south of eta Vir. in eastern lower dawn skies, has a visual brightness of about 7th magnitude. The length of dust tail can be estimated about a bit longer than a degree from the second wide-field image. Although the detailed structures look a bit indistinct because the observed elevation of the comet is getting lower and lower gradually, it looks that the comet has started to stretch a thin ionized tail from the images.
  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 14, 2013
2012S1 ISON on early morning of Nov 8, 2013

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