Comet Holmes on Oct 29, 2007


Date & Time: (left)Oct 29 2007, from 21:58 to 22:01 JST(+0900), 20sec.×8shots
(right)Oct 29 2007, from 21:57 to 21:58 JST(+0900), 5sec.×4shots
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


This comet Holmes image has been captured at Tokyo two days later from my first observation on Oct 27. The comet keeps its brightness of about 2nd or 3rd magnitude. The coma has a visual diameter of about 6.5 arc minutes, about 30% larger than that on Oct 27. It's considered that the dust composition of the coma is spreading out with drastic velocity.


Holmes on Oct 31, 2007
Holmes on Oct 27, 2007

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