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Author Topic: Comet C/2013 US10 (Catalina) Jan 8  (Read 557 times)

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Offline Dave Smith

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Comet C/2013 US10 (Catalina) Jan 8
« on: 17:18:35, 09 January, 2016 »
In the early hours of Friday morning after collecting data for the Cone Nebula I thought I would have another go at Comet Catalina. In the last month it has risen considerably and is now more conveniently placed. This is the result of about 25 x 120s unfiltered using my Megrez 90 with 0.8 FR and an Atik 460EX camera. Unfortunately I forgot to stop dithering between subs and that has contributed to the strange star trails. The length of the trail represents the distance moved by the comet in about an hour, between about 4am and 5am. i.e 50 mins + dither time.

I did manage to see the comet visually through my 8 x 42 binoculars once I allowed enough dark adaption time, but no sign of the tails.



For comparison here is the image I did on Dec 9th 2015



Dave
Website: http://astrosnaps.co.uk

Megrez 90, NEQ6, Atik 460EX M with Astrodon filters, DMK21 in finder guider, SkyShed POD. Celestron 9.25 for visual.
Software: SGPro with PHD2, Nebulosity4, MaximDL  and PS CS2.
Solar imaging:SkyWatcher ST120 with Daystar Quark Chromosphere, Rowan tilt adapter and ZWO ASI 174MM camera. Software: FireCapture, AS!2, Imppg and PS CS2.

Offline Einari

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Re: Comet C/2013 US10 (Catalina) Jan 8
« Reply #1 on: 17:54:46, 09 January, 2016 »
As other images have showed it seems the tails are considerable fainter now.
Tapio

Celestron C8, C9.25" & Hyperstar, iOptron CEM60-EC, TS 80 triplet,  Coronado PST, SXV-694,  ASI120MM/ASI174MC Cool

Offline Dave Smith

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Re: Comet C/2013 US10 (Catalina) Jan 8
« Reply #2 on: 17:48:40, 12 January, 2016 »
I have been thinking about the strange star trails and decided that the dithering could in no way be the culprit, so I have reprocessed the image using Nebulosity4 for the stacking instead of MaximDL. I think it has made a much better job   :thumbup:



Dave
Website: http://astrosnaps.co.uk

Megrez 90, NEQ6, Atik 460EX M with Astrodon filters, DMK21 in finder guider, SkyShed POD. Celestron 9.25 for visual.
Software: SGPro with PHD2, Nebulosity4, MaximDL  and PS CS2.
Solar imaging:SkyWatcher ST120 with Daystar Quark Chromosphere, Rowan tilt adapter and ZWO ASI 174MM camera. Software: FireCapture, AS!2, Imppg and PS CS2.

Offline Einari

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Re: Comet C/2013 US10 (Catalina) Jan 8
« Reply #3 on: 19:43:43, 12 January, 2016 »
Yes it did - which is a bit strange.
What stacking method did you use ?
Tapio

Celestron C8, C9.25" & Hyperstar, iOptron CEM60-EC, TS 80 triplet,  Coronado PST, SXV-694,  ASI120MM/ASI174MC Cool

Offline Dave Smith

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Re: Comet C/2013 US10 (Catalina) Jan 8
« Reply #4 on: 20:39:18, 12 January, 2016 »
Yes it did - which is a bit strange.
What stacking method did you use ?
In both cases just translation and aligning on the head of the comet and then average.

Dave
Website: http://astrosnaps.co.uk

Megrez 90, NEQ6, Atik 460EX M with Astrodon filters, DMK21 in finder guider, SkyShed POD. Celestron 9.25 for visual.
Software: SGPro with PHD2, Nebulosity4, MaximDL  and PS CS2.
Solar imaging:SkyWatcher ST120 with Daystar Quark Chromosphere, Rowan tilt adapter and ZWO ASI 174MM camera. Software: FireCapture, AS!2, Imppg and PS CS2.

 

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