C/2025 A6 (Lemmon) from last night. It is a really good telescopic target right now! Lots more detail throughout the tail but especially close to the coma with streamers fanning out inside the dust tail. It was interesting to see the turquoise coma breezing off to the right a bit too. Not sure if I've picked up on something like that before & why it would have an even steeper angle than the dust tail. Or could be a bit of an illusion with the other side of the dust tail kind of hiding what may be on the other side.
The tail was hauling off downstream like the last session, so I aligned the subs to stars, coma and tail separately like last time. That helped tons. Without the separate tail alignment, it was definitely really smeared on the coma aligned version. Only way to help that would be to use less sub frames so less motion is captured, but then noise gets a lot worse. The 61 mm scope diameter needs all the exposure time it can get.
Anyway, I'm really happy with what showed up on this one, but wow, I've got a lot more to learn on the processing side. It's really easy to turn some steps into totally blunt instruments when you start to see more details hiding in the noise, get excited & want to encourage them to emerge. But things quickly get overcooked, so there's a good bit in there that's kept subliminal.
23 Oct 2025, 6:58-7:58PM MST/0158-0258Z
Canon EOS R5
William Optics ZenithStar 61 II APO
iOptron StarGuider Pro
53 x 60 sec., ISO 800
Subs aligned three ways & merged: stars, coma, tail
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