Re: Possible detection of C/2025 F2 on April 28.86
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Nick, ??????? thanks for the photo. I now realise that I also caught the patchy remnants of the comet about 20-30 minutes after your picture. Photo was taken April 29.91 with a Seestar 50 for 4 minutes and then cropped. There are some power lines towards the top of the photo.
Kind regards
Stephen McCann Southampton, UK (N 50¡ã 56.50', W 001¡ã 27.90')
On Wed, 30 Apr 2025 at 07:33, Andrea Aletti via <aletti.andrea= [email protected]> wrote: Dear all, from Schiaparelli Observatory the ex comet C2025 F2 near the NW Horizon two days ago in excellent sky condition Best Regards Andrea Aletti e Federico Bellini MPC204 Il giorno mar 29 apr 2025 alle ore 23:46 Nick James via <comets= [email protected]> ha scritto: Thomas,
Thanks. That's a great image. I've be plagued by distant cirrus near the
horizon to my northwest (probably aircraft contrails) so my transparency
has not been very good. I did have slightly better conditions tonight
(April 29.86) and the comet is more obvious in this stack:
Nick.
On 29/04/2025 11:28, Thomas Lehmann via wrote:
> Two nights earlier I have had a chance to observe whats left of the comet from
> Weimar, Germany. The comet was at an altitude of only 5.5¡ã above horizon but I
> gave it a try with my RASA 11" and ASI6200MC as conditions were exceptionally
> good for my location.
> The brightness near the head (green color channel) as measured within an
> aperture of 3' is
>? ? 2025 04 26.84 UT, m=9.8mag
> and the tail extent is about 20' at P.A.=333¡ã
>
> I am attaching the stacked image (12 minutes total exposure time) and an
> inverted star trail subtracted and stronger smoothed image to highlight the
> dust tail.
>
> Out of curiosity I am attaching a plot of differential extinction measured from
> stars near the comet as it is taken into account by my AIRTOOLS software
> automatically.
>
> CS
> Thomas
>
>
>> Am Tue, 29 Apr 2025 07:42:48 +0100
>> schrieb "Nick James"<comets@...>:
>>
>> Possible detection of C/2025 F2 (SWAN) on April 28.86:
>>
>>
>>
>> A very noisy image taken in very bright twilight but there is a faint
>> patch of material at the right location.
>>
>> Nick James. BAA
>>
>>
>>
>>
>>
>>
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