[BAA Comets] C/2012 X1 outburst comparision

[Graham Relf]

On 22/10/2013 00:11, DENIS BUCZYNSKI wrote:
> Hello all,
>
> Richard Miles  (BAA) has undertaken further image processing of images taken this evening by Denis Buczynski at Tarbatness and comments as follows:
>
> Attached is the result of an analysis of the
> structure within the expanding halo reproduced in false colour at twice normal
> image size to show the detail present.
>   It looks to me more like 29P than 17P.
>
>
> The reason is in part that the magnitude increase
> of the C/2012 X1 outburst is similar to that of the more energetic 29P ones,
> viz. some 5-6 magnitudes. That of 17P was a megaoutburst at 13-14
> magnitudes!
>   
> Fascinating the way somets behave so unexpectedly.
> This is especially so given that C/2012 X1 was well before perihelion (to be
> precise it was at a true anomaly of about -66 degrees). 17P outburst after
> perihelion.
>   
> I encourage folk to follow the development of this
> present phenomenon taking as many images as poss so they can be stacked for
> analysis.
>
>
> Richard Miles
> The comparison images are located at the following link on the BAA Comet Gallery:
>
>   http://britastro.org/baa/index.php?view=detail&id=1704&option=com_joomgallery&Itemid=200
>
> Denis Buczynski
> Secretary Comet Section
> British Astronomical Association
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> Comets-disc at britastro.org
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A finder chart for C/2012 X1 (LINEAR) is now on the Computing Section 
page, complete with magnitudes and B-V indicators for surrounding stars: 
http://britastro.org/computing/charts_comet.html

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Graham