Further to my message yesterday the astrometric arc for this comet
(currently designated SWAN25F on PCCP) is now 9 days and so the orbit is
pretty secure. The attached is from Findorb using all the current
astrometry on PCCP plus my additional observations of this morning. The
comet is quite well placed for the UK over the next few weeks as it
moves north in declination, passing under the pole from the morning to
evening sky in late April.

I had a report from Denis Buczynski that he imaged the comet this
morning and Maik Meyer reports a visual observation. This is the
brightest comet around at the moment so it is worth getting up early to
observe it. If you do, then please image C/2023 A3 as well. It is a
morning object tooo but quite a bit higher.

Nick.

On 03/04/2025 06:02, Nick James wrote:
> On April 1st Michael Mattiazzo reported a probable comet in SWAN data
> with a position in Pegasus. I performed a search around the rough
> position on the morning of April 2 but didn't find anything.
> Subsequently Qicheng Zhang found the comet in images he had taken using
> a 40mm refractor on April 2.51. This allowed Bill Gray to compute an
> ephemeris and Mattazzio then found a precovery image from March 30.22.
>
> For now, this comet doesn't have an official designation but you can get
> an ephemeris from here:
>
> https://www.projectpluto.com/swan.htm
>
> I imaged it this morning from Chelmsford in bright twilight as it
> cleared the roof of my house.
>
> http://nickdjames.com/Comets/2025/20250402/swan25f_20250403_041715_ndj.jpg
>
> Michael Jaeger reports a total magnitude of 10.0.
>
> Nick.
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