Dates: Dec. 19, 2017
Integration: 2.2 hours
Avg. Moon age: 1.08 days
Avg. Moon phase: 1.32%
Astrometry.net job: 1875576
RA center: 56.739 degrees
DEC center: 24.128 degrees
Pixel scale: 3.765 arcsec/pixel
Orientation: 269.616 degrees
Field radius: 1.175 degrees
Locations: Home, Milwaukee, Wisconsin, United States
I prefer getting out to darker skies when doing LRGB, but right now things are not conducive to doing so. M45 is an easy object to nab from light polluted skies, although I was very surprised at how much nebulosity I was able to grab. Not too shabby!
Posted image is a crop to remove vignetting
ASI1600MMC, -15C, Gain 139/Offset 21 (Unity)
R 36x60s, 14x30s
G 36x60s, 14x30s
B 36x60s, 14x30s
Completely reprocessed in PI from integration forward because I didn't like how the stars turned out. Closer examination revealed that the high sigma clipping was a bit too aggressive and was chomping off the tops of my stars. The stars in my LUM stack had halos around everything, so I tried creating a superlum and it helped mitigate things. My stack came out cleaner, so I didn't have to crop as much to eliminate vignetting, and I also darkened the background less so just a hint of the surrounding nebulosity shines through.
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