Comet 2007Q3 Siding Spring on early morning of Dec 20, 2009


Date & Time: Dec 19 2009, from 27:24 to 28:05 JST(+0900)
Composed 5 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt Cassegrain with a conversion lens (f=1760mm, F7.1)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D50 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)
CCD Sensitivity...ISO1600


The first shot of comet Siding Spring in that day has been positioned in eastern region of Coma Berenices, has a coma with brightness of 9th magnitude and a dust tail with length of about 15 arc minutes stretched in west direction. And we can detect a dimmed greenish ionized composition around the coma.
In that day the comet had about its maximum apparent brightness, will move to northeast direction from now on.


Siding Spring on early morning of Dec 27, 2009
Christensen on Oct 11, 2009

Copyright(c) 2009 by Naoyuki Kurita, All rights reserved.
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