This comet was first noted in SWAN data by Vladimir Bezugly on September 11. We now have a 40 hour arc of decent astrometry from southern hemisphere sites and, forcing e=1, I get a perihelion of 0.50 au on Sept 10 (see the elements attached from FINDORB). This orbit is still pretty unreliable but it indicates that the comet will make a close approach to the Earth on October 17 when it is at a decent elongation (76 deg). How bright it will be at that time is anybody’s guess.
I’ve also just updated the item on C/2025 A6 and that is looking promising now, so October could be an exciting month for comet observers:
https://britastro.org/section_news_item/c-2025-a6-lemmon
