M31 Oct 2017 (Theli, PS, v1)

andromeda, astrofotografie, astronomie, astronomy, astrophotography, galaxy, m110, m31, m32, messier, ngc, ngc224, spiral galaxy

M31 Oct 2017 (Theli, PS, v1)

Backyard astrophotography in light-polluted Cologne-Dellbrück (19.5 mag/”2)
William Optics GT 81 FD 478mm f/5.9, IDAS LPS P2, TSFlat2, Canon 5D Mark II (a)
Mount AZ EQ6 GT, WO Guiding Scope 50mm f/4, ALccd QHY 5L-II mono
Dithering with BackyardEOS and PHD2
70 x 900s ISO 200, 20 flats, 50 bias, 10+11 darks
Data reduction using Theli (NOMAD calibration)
Image processing using STIFF, Photoshop, Lightroom
Crop 80%

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