Comet Holmes on Dec 1, 2007


f=742mm prime focus

Date & Time: Dec 1 2007, from 22:34 to 23:23 JST(+0900)
Composed 8shots with 5 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon with a conversion lens (f=742mm, F4.6)
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 x 2016)
CCD Sensitivity...ISO1600, White Balance...Auto




f=200mm telephoto / f=24 wide-angle

Date & Time: (left) Dec 1 2007, from 20:26 to 20:40 JST(+0900), 4min. x 4shots
(right) Dec 1 2007, from 22:38 to 23:14 JST(+0900), 5min. x 6shots
Optical: (left) AF zoom-Nikkor ED 80-200mmF2.8 (f=200mm, Aperture: F2.8)
(right) TAMRON SP 17-50mmF2.8 (f=24mm, Aperture: F3.5)
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 x 2000)
CCD Sensitivity...ISO800




The comet Holmes in that day has a diameter of over 45 arc minutes, I could detect the comet clearly with naked eyes although had a fairly dimmed coma. We can see the comet with a thin trail of dust stretched from small nucleus in vast coma, looks like a compact comet in larger comet.




Holmes on Dec 8, 2007

Holmes on early morning of Nov 23, 2007


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