Comet Holmes on early morning of Nov 23, 2007


f=1000mm prime focus

Date & Time: Nov 22 2007, from 28:45 to 29:06 JST(+0900)
Composed 6shots with 4 minutes exposed
Optical: TAKAHASHI 12.5cm (4.9") fluorite refractor (f=1000mm, F8.0)
Auto-guided with VIXEN ATLUX Eqatorial，ToUcam ProII & Guidemaster
Digital Camera: Nikon D80 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

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



f=530mm prime focus

Date & Time: Nov 22 2007, from 28:43 to 28:57 JST(+0900)
Composed 4shots with 4 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Fujifilm FinePix S2Pro
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto



f=80mm telephoto (Comet Holmes & Mel.20)

Date & Time: Nov 22 2007, from 29:05 to 29:14 JST(+0900)
Composed 3shots with 4 minutes exposed
Optical: AF zoom-Nikkor ED 80-200mmF2.8 (f=80mm, Aperture: F3.2)
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Nikon D70 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)
CCD Sensitivity...ISO800


The comet Holmes, about a month later from its outburst, in that day has been positioned just west of alpha Persei, can be observed with naked eyes for a little time between set of the Moon and beginning of dawn light. The comet has a visual brightness of about 3.5 or 4.0th magnitude and a larger diameter of about 36 arc minutes beyond thin clouds.


Holmes on Dec 1, 2007
Holmes on Nov 16 & 17, 2007

Copyright(c) 2007 by Naoyuki Kurita, All rights reserved.
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