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Old 20-03-2020, 05:42 PM
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Atmos (Colin)
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Join Date: Aug 2011
Location: Melbourne
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Eta Carina; Missed it by that much

I took this back on the first few days on Jan, its one that never quite turned out but I figured I'd post it anyway a few months down the track. It was used as a filler at the end of a night after I'd photographed NGC 2070 and for some reason after focusing it didn't quite centre itself on Eta Carina. With only 36 minutes of data taken from a suburban light polluted back yard I'm pretty happy with the overall detail.

Mewlon 250 F/10
ASI094
36x60s at Unity gain.

I'm pretty sure the issue came from having MaximDL having access to the mount as opposed to it just being used as a slave for camera and focuser control.
FWHM moves from 3.8 pixels to 4.3 out at Eta Carina which is noticeable due to the non-round stars. at 0.4"/pixel it means a FWHM of 1.5-1.7" which I'm pretty happy with. Much better than I was expecting to get. There is some triangular stars starting to show that I haven't bothered trying to fix, I'm assuming that shooting on both sides of meridian would leave me with perfectly round stars though.

Link for pixel peepers
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