Comet 2012K5 LINEAR on Dec 22, 2012

Date & Time: Dec 22 2012, from 26:00 to 26:37 JST(+0900)
Composed 7 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain, with a conversion lens (f=1790mm, F7.1)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D700
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(2784 x 1848)
Device Size...DX format (24 x 16mm)
Sensitivity...ISO2500, White Balance...Daylight

The comet 2012K5 LINEAR in that day is lying at about 1.3 degrees east of alpha UMa, a tip star of Big Dipper. Now the comet is close to the Earth, looks its dust tail spread widely than that in previous observation, and moving very rapidly. The coma has a visual brightness of about 9th magnitude, and it can be detected that the comet has a dust tail with a length of 20 arc minutes.

2012K5 LINEAR on Jan 12, 2013

2012K5 LINEAR on early morning of Dec 9, 2012

Copyright(c) 2012 by Naoyuki Kurita, All rights reserved.
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