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

[Peter Carson]

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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