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

[Thomas Lehmann]

Very nice capture, Nick!
I' curious if the right "fragment" is the original nucleus and the bright dust
cloud and tail is emerging from a cluster of smaller fragments drifting away.
Keep on watching it ...

Thomas

> Am Thu, 9 Apr 2020 21:42:22 +0100
> schrieb Nick James <ndj at nickdjames.com>:
>
> Evening all,
> 
> I've just started imaging this comet tonight and there is a small 
> condensation now right emerging from the front of the extended coma. 
> This also appears in Gianluca Masi's image from tonight. Interestingly 
> if you do astrometry on this condensation it is within 2 arcsec (just 
> under 2 pixels at this scale) of the expected nucleus position based on 
> the orbit using data up to March 25.
> 
> This is only a short stack. I'll have better data later if the weather 
> cooperates.
> 
> Nick.
>