DESCRIPTION: I had chance collect more data and integrate 2 sessions together. Total integration time 96 min.
OBJECT: M 81 (Bode’s Galaxy - in the center) and M 82 (Cigar Galaxy-right) , Constellation Ursa Major (Uma), apparent magnitude 7 resp. 8,4, apparent dimension 26 x 100 resp. 11x 4 arcmin, Other objects: NGC 3077 The Garland Galaxy (in the middle of the top) and NGC 2976 (down on the left). FOV 2,5 x 1,7 arcdeg.
GEAR: Nikon Z7 Kolari Full Spectrum + Nikkor 500/5,6 PF, Astronomic UV+IR+L2 Clip in filter, Rollei Astroklar LP filter, pixel scale 1,79 arcsec/px, tracking mount iOptron CEM60EC - 3 star alignment, no auto guiding.
ACQUISITION: Session 1 - May 8, 2021, Struz, CZ, Subexposure 180s, f 5,6, ISO 800, Interval 20 s, Light 8x, Dark 20x, Bias 0x, Flat 20x, FlatDark 20. Total exposure time 24 min. Night, no Moon, light wind, +5C.Light pollution - Bortle 5. Session 2 - Jun 2,2021, Struz, CZ, Subexposure 60s, f 5,6, ISO 800, Interval 10 s, Light 72x, Dark 30x, Bias 0x, Flat 20x, FlatDark 20. Total exposure time 72 min. Night, no Moon, light wind, +10C.Light pollution - Bortle 5
STACKING AND POST PROCESSING: AstroPixelProcessor (stacking, background neutralization, light pollution removal, calibrate background and stars colours) , Adobe Photoshop CC 2021 (stretching, black and white point settings, star reduction, enhance DSO, noise reduction, contrast setting and sharpening). Cropped 2,75 x, image size 3840x2560 px.
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