C/2007Q3 Siding Spring on early morning of Jan 23, 2010

Comet 2007Q3 Siding Spring on early morning of Jan 23, 2010

Date & Time:	Jan 22 2010, from 28:05 to 28:56 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 comet Siding Spring in that day has been positioned in western Bootes with a coma brightness of 9th magnitude and has a bit spread dust tail in west direction. It was good transparency condition, I could detect the tail with a length of over 15 arc minutes reached edge of this picture.

Siding Spring on Feb 6, 2010

Siding Spring on early morning of Jan 17, 2010

		Copyright(c) 2010 by Naoyuki Kurita, All rights reserved.
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