![20-inch ritchey-chretien, 7582 - Grus Quartet Galaxies -, 7590, NA, NGC 7599, astrofotografie, astronomie, astronomy, astrophotography, galaxy, grus, grus quartet, hakos, hakos guest farm, ias, ias observatory, ias observatory hakos, khomas, kranich, namibia, spiral galaxy, world](https://photo.m-j-s.net/blog/uploads/2023/09/ngc7582_lrgb_v1-ngc_7599__7590__7582_-_grus_quartet_galaxies_-_ias_hakos__namibia_-_sep_2023_v1.jpg)
Only three of the quartet, NGC 7522 is a bit further out, but NGC 7599, 7590, and 7582 just barely fit the frame. Data from September at IAS Observatory, Hakos, Namibia.
More details at Astrobin.
IAS – Internationale Amateursternwarte e.V. – Hakos Observatory, Namibia
IAS 20″ Alluna RC, f/8 @ 4120 mm, 10 Micron GM 4000 HPS
QHY268M, Baader LRGB
48x L, 21x R, 20x G, 18x B 200s, binning 2×2, gain 56, offset 10, -5C, 20 flats, 50 bias, 20 darks
Data calibration/integration: PixInsight
Image processing: PixInsight, Photoshop, Lightroom
![20-inch ritchey-chretien, 7582 - Grus Quartet Galaxies -, 7590, NA, NGC 7599, astrofotografie, astronomie, astronomy, astrophotography, galaxy, grus, grus quartet, hakos, hakos guest farm, ias, ias observatory, ias observatory hakos, khomas, kranich, namibia, spiral galaxy, world](https://photo.m-j-s.net/blog/uploads/2023/09/ngc7582_lrgb_v1_annotated-ngc_7599__7590__7582_-_grus_quartet_galaxies_-_ias_hakos__namibia_-_sep_2023_v1_annotated.jpg)