Comet Wirtanen on Jan 5, 2008

Date & Time: Jan 5 2008, from 18:08 to 18:34 JST(+0900)
Composed 5shots with 5 minutes exposed
Optical: TAKAHASHI 12.5cm(4.9") fluorite refractor with a conversion lens (f=700mm, F5.6)
with IDAS LPS-P2-FF Light-pollution suppression filter
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Nikon D80 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

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

My first shot of comet Wirtanen in that day shows you only bluish coma with a diameter of about 3 arc minutes and 9th magnitude in brightness, positioned in eastern region of Aquarius. The comet Wirtanen will move eastward from now on, can be observed under good condition until early spring in 2008.

Wirtanen on Jan 13, 2008

Tuttle on Jan 26, 2008

Copyright(c) 2008 by Naoyuki Kurita, All rights reserved.
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