Comet Holmes on Oct 31, 2007


f=500mm prime

Date & Time: Oct 31 2007, from 21:47 to 21:49 JST(+0900)
Composed 4shots with 30seconds exposed
Optical: PENTAX 7.5cm(2.9") ED refractor (f=500mm, F6.7)
with IDAS LPS-P1 Light-pollution suppression filter
Auto-guided with Kenko SKYMEMO Equatorial
Digital Camera: Nikon D80 (Remodeled)
Location: Kokubunji city, Tokyo

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

Trimmed equivalent to f=2500mm



f=50mm wide-angle

Date & Time: Oct 31 2007, from 21:56 to 21:57 JST(+0900)
Composed 4shots with 8seconds exposed
Optical: TAMRON SP AF 17-50mm F2.8 (f=50mm, Aperture: F3.5)
Auto-guided with Kenko SKYMEMO Equatorial
Digital Camera: Nikon D80 (Remodeled)
Location: Kokubunji city, Tokyo

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


This image shows you the comet Holmes about a week later of its outburst. The coma has expanded to 9.7 arc minutes, the brightness has a bit fallen to 3rd magnitude. But we could detect the comet easily only with naked eyes at Tokyo. The nucleus has fairly been offset from the center of dust coma, and the southwest edge has been looked dimmed.


Holmes on early morning of Nov 3, 2007
Holmes on Oct 29, 2007

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