Comet Holmes on Nov 7, 2007


f=1600mm prime focus

Date & Time: Nov 7 2007, from 27:11 to 27:38 JST(+0900)
composed 6shots with 4 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D80 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...12bit CCD-RAW, converted to 16bit TIFF(3872×2592)
CCD Sensitivity...ISO1600



f=530mm prime focus

Date & Time: Nov 7 2007, from 25:53 to 26:24 JST(+0900)
composed 4shots with 30sec. & 6shots with 4min. exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Fujifilm FinePix S2Pro
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto


The comet Holmes in that day has a visual brightness of about 3rd magnitude and coma diameter of 20arc minutes. The coma has occupied almost full flame of the first picture captured by f=1600mm prime focus. The comet has striking short dust tail in southwest direction, it looks like a bullet or a jerry fish.
The second image shows you the distribution of indistinct bluish ion tails. We can detect three or four stripes stretched in west and south directions like tentacles.


Holmes on Nov 11, 2007
Holmes on evening Nov 3 till early morning Nov 4, 2007

Copyright(c) 2007 by Naoyuki Kurita, All rights reserved.
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