M101 – Pinwheel Galaxy

astrofotografie, astronomie, astronomy, astrophotography, feuerrad-galaxie, galaxy, m101, messier, pinwheel galaxy, ursa major
M101 – Pinwheel Galaxy – Apr 2020 v1

All details at Astrobin, see also below.

Backyard astrophotography in light-polluted Cologne-Dellbrück (SQM 19.6-20.0)
Skywatcher Esprit 100/550 ED, Skywatcher Flattener, Optolong L-eNhance / Astronomik L-2, ASI 294MC ProOAG with Lodestar X2Mount AZ EQ6 GT
Image acquisition: CdC, APT, PHD2, dithering
L-2: 138 x 400s, gain 60, -10C, 30 flats, 30 darkflat, 18 darks
L-eNhance: 45 x 900s, gain 120, -10C, 30 flats, 30 darkflats, 16 darks
Data calibration/integration: PixInsight, drizzle integration, 50% crop
Image processing: PixInsight, Photoshop, Lightroom