[BAA Comets] Sudden changes on C/2019 Y4 (ATLAS)

[twinklespinalot at gmail.com]

As I stated on FB, if this comet has split up it could be very interesting to watch further, we could have another 73P/Schwassman-Wachmann on our hands
Sent from my iPhone

> On 7 Apr 2020, at 02:35, Nick Haigh <happylimpet at hotmail.com> wrote:
> 
> 
> Hi all, I took these images this evening with a 610 baader longpass (as full moon) coveing 6820secs of 10sec subs.
> 
> Clearly show breakup of the nucleus - or at least several condensations, to be interpreted somehow!
> 
> Image 6.2' wide - ive upsampled it 2x to make it clearer. Original resolution 0.72"/pixel, so ~1.44"/pix here.
> 
> Cheers
> 
> Nick
> From: Comets-disc <comets-disc-bounces at lists.britastro.org> on behalf of Nick James <ndj at nickdjames.com>
> Sent: 06 April 2020 21:26
> To: BAA Comets discussion list <comets-disc at britastro.org>
> Subject: Re: [BAA Comets] Sudden changes on C/2019 Y4 (ATLAS)
>  
> As of this evening (April 6) my astrometry now shows a residual of 6 
> arcsec in RA (approx in the direction of the tail). I've plotted the 
> brightness profile of the comet in a slice through the nucleus and 
> parallel to the tail for three dates, 2020 March 31, April 5 and April 
> 6. The peak brightness is falling and the inner coma is broader in the 
> tailward direction. All of this implies this comet may not last much 
> longer. I hope I'm wrong but observe it while you can!
> 
> Nick.
> <c2019y4-20200406-610-2_cropsc_itgauss_x2_arrow.jpg>
> <c2019y4-20200406-610-2_cropsc_itgauss_x2.jpg>
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