Comet Machholz on Jan 7, 2005


Date & Time: Jan 7 2005, from 22:22 to 22:36 JST(+0900)
Composed 8 shots with 90 seconds exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Fujifilm FinePix S2 Pro
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



Date & Time: Jan 7 2005, from 21:13 to 21:27 JST(+0900)
Composed 8 shots with 90 seconds exposed
Optical: TAMURON SP f=300mmF2.8, Aperture: F4.0
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Fujifilm FinePix S2 Pro
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


The comet Machholz in that day has positioned at about 4 degrees southwest of the Pleiades, having a coma with 3rd magnitude and an active ion tail. You can see in a reversed image that the ion tail has been widened around the tip. It's considered that the comet had a fairly large-scaled gush activity of plasma matters several hours ago.


Machholz on Jan 9, 2005
Machholz on Jan 1, 2005

Copyright(c) 2005 by Naoyuki Kurita, All rights reserved.
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