Contains: NGC 3628, M 66, NGC 3627, M 65, NGC 3623
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M66 Group - Leo Triplett

Technical card

Resolution: 4704x4001

Dates: Feb. 5, 2018Feb. 7, 2018Feb. 8, 2018

Baader Planetarium Ha 31mm 7nm: 50x120" (gain: 139.00) -20C bin 1x1
Baader Planetarium L 31mm: 50x120" (gain: 139.00) -20C bin 1x1
Baader Planetarium RGB 31mm: 90x120" (gain: 139.00) -20C bin 1x1

Integration: 6.3 hours

Darks: ~50

Flats: ~25

Bias: ~100

Avg. Moon age: 21.65 days

Avg. Moon phase: 55.06%

Bortle Dark-Sky Scale: 5.00

Temperature: -3.33 job: 1924751

RA center: 169.891 degrees

DEC center: 13.267 degrees

Pixel scale: 0.941 arcsec/pixel

Orientation: 272.225 degrees

Field radius: 0.807 degrees

Locations: Home, Odenthal, Deutschland, Germany


First try to get a full LHaRGB image to work, quite a bit of fiddling around with the percentages and how to combine it. Also realised the ASI needs as many subs as you can get ... only 30 per channel are still very noisy (or I am doing something terribly wrong...)



Frank Schmitz



Reprocess with more H-alpha and crop


Bit brighter

Sky plot

Sky plot


M66 Group - Leo Triplett, 


        Frank Schmitz