Re: [BAA Comets] Fragmentation of C/2025 K1 (ATLAS)
Fabrizio Montanucci 01 Jan 2026 09:42 UTC
Hi Nick,
And happy 2026 to all. Attached is the preliminary result of my shoot
last night: 548 frames of 6 seconds each, since 17.58.06 UT to
19.07.26, obtained with a Celestar 8 at F/10 and a ZWO ASI 1600MM Pro
in bin x 4. The scale should be 1.613''/pixel, if necessary I can
double-check.
Fabrizio Montanucci
On Wed, 31 Dec 2025 19:45:48 +0000
Nick James <ndj@nickdjames.com> wrote:
> Happy New Year to all. I hope you had a good Christmas.
>
>Fragmenting comet C/2025 K1 (ATLAS) has been relatively stable for
>the past few weeks with two fragments visible. Leading fragment A is
>fainter and trailing fragment C is brightest. This image by Denis
>Buczynski taken on Christmas night shows the situation:
>
> https://britastro.org/cometobs/2025k1/2025k1_20251225_2200_dgb.html
>
> The comet is quite faint now and the Moon makes the sky very bright
>so imaging it is a challenge. Nick Quinn observed the comet last
>night (Dec 30.8) and his images appear to show a new component behind
>C. I've imaged the comet tonight (Dec 31.8) and there is nothing
>obvious in my 40x60s stack however component C appears significantly
>elongated. This image is 4.8 x 2.4 arcmin, N up.
>
> If you get a chance to image this comet please go as deep as you can
>so that we can continue tracking its activity into the new year.
>
> Nick.
>
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