[BAA Comets] 2013US10 from Southend Essex

[David Reynolds]

thanks Nick
Nice image.  Regarding your magnitude estimate, I assume that it is 
derived from an algorithm.  How does this equate to the usual v, b and p 
magnitude estimates?
Fantastic detail in the tail in Peter's image, wonderful.
Regards
David Reynolds
Norfolk




On 10/12/2015 23:06, Nick James wrote:
> I've processed my 200mm, f/2.8L frames and can convince myself that 
> the ion tail extends for at least 3 deg. It is very low contrast though.
>
> http://www.nickdjames.com/2013US10/2013us10_20151209_0547_ndj.jpg
>
> Using the green channel of the DSLR image and UCAC-4 V references I 
> get a total magnitude of 6.4 at 0547 on 2015-12-09.
>
> Nick.
>
>
>> Here's the resulting image from yesterday mornings efforts. 
>> http://www.astromania.co.uk/2013US10_20151209_0603_PCarson.jpg The 
>> tail has got several strands and waves in it.
>> It was a lovely morning yesterday, if a little misty. This is the 
>> general view of the thin crescent moon rising with Venus and Spica up 
>> to the right. http://www.astromania.co.uk/20151209-Dawn.jpg
>>
>> Peter
>>
>> -----Original Message-----
>> From: Nick James
>> Sent: Wednesday, December 09, 2015 7:24 AM
>> To: BAA Comets discussion list
>> Subject: Re: [BAA Comets] 2013US10 from Southend Essex
>>
>> Peter,
>>
>> A really nice clear night last night with lots of comet images, a couple
>> of NEOs and some other stuff. I managed to get a couple of hours of
>> sleep but I too have a long day ahead at work...
>>
>> Since C/2013 US10 is now much higher I stayed in Chelmsford but I did
>> screw up in my planning. With one exception the comet is now well above
>> my local horizon so I was hoping to get some good shots using my
>> widefield camera on the main mount (SXVR-H18 + WO Megrez 72, f/6).
>> Unfortunately, the exception was a large tree which blocks the view to
>> my SW and US10 disappeared into that at around 0535 so I don't have many
>> frames to stack.
>>
>> In a hurry I set up my 200mm f/2.8L lens on another mount down the
>> garden and do have a long run on the comet using that.
>>
>> I could see the comet clearly in 11x80s from my light-polluted back
>> garden but just as a fuzzy ball with a starlike centre. No sign of any
>> tails but that is not surprising from here.
>>
>> A beautiful thin crescent Moon and Venus in a brightening sky as I set
>> up to take the flats rounded off a very nice night.
>>
>> Lots of coffee now then off to work.
>>
>> Nick.
>>
>>
>>
>>> The additional altitude of 2013US10 made for a much better view. I 
>>> could detect the comet in my 7x50’s from the urban observing site 
>>> (SQM-L 18.66 in the direction of the comet). In the 11x80’s the star 
>>> like nucleus surrounded by a hazy coma was obvious. I thought I 
>>> could detect extensions to the south and west but I did know what to 
>>> expect so maybe my imagination was helping.
>>> I imaged 2013US10 with my 100mm refractor and it appears I’ve got 
>>> some useful data. However the processing will have to wait until 
>>> tomorrow...I’ve got a full day to day.
>>> What are others seeing?
>>> Peter
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>>
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