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Dave882
11-02-2023, 10:55 AM
My first shot at the much publicised 'green comet' - from the B7 Sydney suburbs and looking right into the Sydney cbd light dome so not expecting too much.

c14 Hyperstar on eq8 / asi2600mc
ASIAIR APP

It's smaller and dimmer than I'd expected, and moving really quick through the star field so even at 700mm fl max sub length approx 60sec . Although test shots not too promising I plugged about 60min of data into APP using the comet registration option and it spat out a starless (ish) result :shrug: Not sure how that happened, but could be the adaptive rejection filter or something else (tbc later).

Very messy result with lots of streaks from the unintentionally removed stars and crazy banding from my flat panel which I'll need to remedy - but without stars it does make the tail a bit easier to discern.

Happy to be able to pick up its dust/ice tail as well as the ion tail which is suuuuper long and forked by the looks of it. Green glow also showing quite prominent as advertised.

If the weather holds up I'm going to try and get out of Sydney tonight or next weekend for another shot in B4ish sky.

Thanks for looking!

Geochron
11-02-2023, 03:54 PM
That's a great shot! I'm just starting to see a faint ion tail from Melbourne too in last night's image. Hoping for clear skies tonight...

Very much interested in how you achieved the star removal - when you find out:). When I use the star reduction/removal tool in APP (after normal comet registration) it makes a real mess of things...

Averton
11-02-2023, 09:19 PM
Great shot of the comet David!