[BAA Comets] C/2013 US10 Catalina - Apparent 3rd tail ?

[Andrew Robertson]

I've learnt over the years that you have to grab any window whilst it's there with the forecasts in this country :-) I hate colds!

Looking promising for tonight here in Norfolk but then it invariably is clear when there's a moon up!

Andrew


-----Original Message-----
From: Comets-disc [mailto:comets-disc-bounces at britastro.org] On Behalf Of Peter Carson
Sent: 18 January 2016 11:45
To: BAA Comets discussion list <comets-disc at britastro.org>
Subject: Re: [BAA Comets] C/2013 US10 Catalina - Apparent 3rd tail ?

Hi Andrew,
Yes I agree the ion tail is forked, I don't think 2013US10 has grown another separate tail.
Some of my previous images show the tenuous infilling you mention between the two tails. My image from the 16th was taken under hazy sky conditions so doesn't show it well and its too close in to the nucleus.
I had intended to use my 100mm refractor to get the image on that night as this would have provided a field of view nearly 2 degrees wide and better displayed the comet. The sky had been clear since sunset and I had been out earlier in the evening, but decided to go to bed and get up before dawn because I was feeling unwell with a cold. When I got up at 04.45am the sky was deteriorating fast and I didn't have time to swap the camera over. I should have persevered later into the night before and just taken a bigger box of tissues out to the observatory with me to mop my nose up!!

Peter

-----Original Message-----
From: Andrew Robertson
Sent: Monday, January 18, 2016 11:26 AM
To: 'BAA Comets discussion list'
Subject: Re: [BAA Comets] C/2013 US10 Catalina - Apparent 3rd tail ?

Your image shows it more as a fork in the ion tail rather than a 3rd tail Peter. I did look at it last night about 1.30am after the moon had largely got out of the way but I was only using my OMC 200 albeit a very high contrast scope. In that there was a very large coma with a much larger tenuous extension filled in over about 90 degrees.

Andrew

-----Original Message-----
From: Comets-disc [mailto:comets-disc-bounces at britastro.org] On Behalf Of Peter Carson
Sent: 18 January 2016 11:21
To: BAA Comets discussion list <comets-disc at britastro.org>
Subject: Re: [BAA Comets] C/2013 US10 Catalina - Apparent 3rd tail ?

Hi Mike,
I imaged C/2013US10 107 minutes after you on the 16th Jan. My image, which is closer in to the coma, also shows a streamer heading off slightly south of west.
Full details are on the image.
http://www.astromania.co.uk/2013US10_20160116_0535_PCarson.jpg

All the best
Peter

-----Original Message-----
From: Andrew Robertson
Sent: Monday, January 18, 2016 8:52 AM
To: 'BAA Comets discussion list'
Subject: Re: [BAA Comets] C/2013 US10 Catalina - Apparent 3rd tail ?

More noticeable with the star trails removed. Interesting.

Andrew

-----Original Message-----
From: Comets-disc [mailto:comets-disc-bounces at britastro.org] On Behalf Of Michael Oates
Sent: 17 January 2016 18:32
To: BAA Comets discussion list <comets-disc at britastro.org>
Subject: [BAA Comets] C/2013 US10 Catalina - Apparent 3rd tail ?

Hi,

There is what appears to be a faint third tail between the main dust and gas tails.

45 subs of 60s each, all registered on the comet. Full details on the images.

With trailed stars:
http://astrob.in/236516/B/

Stars removed by using rejection during integration.
http://astrob.in/236516/0/

Regards,

Mike
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