Comet 2011L4 PanSTARRS on Aug 19, 2012

Date & Time: Aug 19 2012, from 19:47 to 20:15 JST(+0900)
Composed 5 shots with 3 minutes exposed
Optical: VIXEN 20cm(7.9") VISAC, with a conversion lens (f=1278mm, F6.4)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Camera: Nikon D700
Location: Hitachi-oota city, Ibaraki pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(2784 x 1848)
Device Size...DX format (24 x 16mm)
CCD Sensitivity...ISO3200

The comet PanSTARRS in that day has been positioned at a degree WNW from sigma Librae, a southern 3rd mag. star of the constellation, in lower southwest dusk skies. The coma has a visual brightness of about 11th or 12th magnitude, getting brighter than the prediction. And you can detect a short tail with a length of about 2 arc minutes in east direction.
This image has been trimmed to equivalent focal length of 2000mm.

2011L4 PanStarrs on Mar 10, 2013

2012K5 LINEAR on Jan 12, 2013

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