Comet 2013UC10 Catalina on early morning of Dec 5 & 6, 2015


Change of ion tail for a day

Date & Time: Upper: Dec 4 2015, from 28:38 to 29:04 JST(+0900), 3min × 9shots
Lower: Dec 5 2015, from 28:47 to 29:22 JST(+0900), 3min × 12shots
Optical: TAKAHASHI 12.5cm(4.9") Fluorite refractor with a conversion lens (f=700mm, F5.6)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Canon EOS 600D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO800(Upper), ISO1600(Lower)



Date & Time: Dec 5 2015, from 28:48 to 29:23 JST(+0900)
Composed 12 shots with 3min. exposed
Optical: BORG 67FL with a conversion lens (f=210mm, F3.3)
with Astronomik CLS-CCD filter
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO1600


You can see my first observation shots of the comet 2013UC10 Catalina appeared from the lower dawn ESE skies. The comet has positioned at about 6 degrees east of the Venus, and had the elevation of 19 degrees at the start of twilight. The coma has the visual brightness of about 6th magnitude, the comet has the ion tail in west direction with over 4 degrees in length, and the dust tail in southeast as so-called the anti-tail.
In that night I affected with the waning moon, could detect no clear ion tail with binocular-aided naked eyes. The comet passed the perihelion on Nov 15, but the coma looks keeping its activities, you can see that the ion tail on early morning of Dec 5 has the clear wavy structures.
  The 1st image: View angle: 1.82×1.21°
  The 2nd image has been cropped with an equivalent f=300mm. (View angle: 4.25×2.84°)


2013UC10 Catalina on early morning of Dec 8 & 9, 2015
2013X1 PanSTARRS on early morning of Jun 4, 2016

Copyright(c) 2015 by Naoyuki Kurita, All rights reserved.
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