![HaLRGB, andromeda, andromeda galaxy, andromeda nebula, astrofotografie, astronomie, astronomy, astrophotography, deep sky, galaxy, m110, m31, m32, messier, spiral galaxy](https://photo.m-j-s.net/blog/uploads/2021/10/lrgb_ha_v1-m31_-_andromeda_galaxy_-_halrgb_oct_2021_v1.jpg)
Because it’s that time of year … a fresh shot at a very familiar target during two clear nights in October. Ha, L, R, G, B with the QHY268M, but still facing problems with the Esprit and the Optolong filters.
Details at Astrobin.
Backyard astrophotography in light-polluted Cologne-Dellbrück (SQM 19.6-7)
Skywatcher Esprit 100/550 ED, Skywatcher Flattener, Optolong Ha 7nm / LRGB, QHY268M
OAG with Lodestar X2
Mount AZ EQ6 GT
Image acquisition: CdC, NINA, PHD2, dithering
Ha 24 x 600s, L 77 x 100s, R 15 x 200s, G 14 x 200s, B 14 x 200s, mode 1, gain 56, offset 10, -5C, 20 flats HaRGB, 40 flats L, 50 bias, 20 darks
Data calibration/integration: PixInsight
Image processing: PixInsight, Photoshop, Lightroom
![HaLRGB, andromeda, andromeda galaxy, andromeda nebula, astrofotografie, astronomie, astronomy, astrophotography, deep sky, galaxy, m110, m31, m32, messier, spiral galaxy](https://photo.m-j-s.net/blog/uploads/2021/10/lrgb_ha_v1_annotated-m31_-_andromeda_galaxy_-_halrgb_oct_2021_v1.jpg)
And of course there have been some previous attempts at M31, in 2013, 2014, 2016, 2017 … hopefully some improvements since then … ;-)
![andromeda, astrofotografie, astronomie, astronomy, astrophotography, galaxy, himmel, m110, m31, m32, messier, sky, star, stars, stern, sterne](https://photo.m-j-s.net/blog/uploads/2013/09/2013-01misc-220-2127-stacked-andromeda_2013.jpg)
![DE, DE-RP, RP, Rheinland-Pfalz, andromeda, arft, astrofotografie, astronomie, astronomy, astrophotography, deutschland, dr heinrich-menke-park, eifel, galaxy, germany, landkreis mayen-koblenz, m110, m31, m32, menke-park, messier, ngc, ngc224, rhineland-palatinate, spiral galaxy, world](https://photo.m-j-s.net/blog/uploads/2017/12/m31-20140927-menkepark-wo-1h30-9subs-nodarks-mks2-edit-m31_eifel_2014_1-1024x684.jpg)
![DE, andromeda, astrofotografie, astronomie, astronomy, astrophotography, deutschland, eifel, galaxy, germany, m110, m31, m32, messier, ngc, ngc224, spiral galaxy, world](https://photo.m-j-s.net/blog/uploads/2017/12/m31-dellbruck-wo-p2-5d2a-56x240-dss-v1-edit-m31_-_andromeda_galaxy_dss_v1-1024x683.jpg)
![andromeda, astrofotografie, astronomie, astronomy, astrophotography, galaxy, m110, m31, m32, messier, ngc, ngc224, spiral galaxy](https://photo.m-j-s.net/blog/uploads/2017/12/m31-rgb_stiff_nomad_mj1apfr-m31_oct_2017_theli__ps__v1-1024x683.jpg)