Comet Christensen on Oct 11, 2009


Date & Time: Oct 11 2009, from 19:02 to 19:22 JST(+0900)
Composed 4 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt Cassegrain with a conversion lens (f=160mm, F6.3)
with BaaderPlanetarium Moon & Skyglow filter
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 Christensen in that day has been positioned in southwest edge of Aquila, can be observed with a coma brightness of about 10th magnitude. You can detect dimmed figure without detailed structures like tails.


Siding Spring on early morning of Dec 20, 2009
Christensen on Sep 20, 2009

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