A quick capture during a clear mid summer night. An “advantage” of the light polution here: even so astronomical twilight isn’t reached, the sky brightness is for approx. 3 hours in the range of SQM 19.5 to 19.9. SQM 20.0 is the maximum I measured in my backyard in spring 2020 with the excellent “lock-down” skies.

Hopefully a break in the currently cloudy and rainy weather for some additional O3 und S2 data during the next days before the moon returns.

Backyard astrophotography in light-polluted Cologne-Dellbrück
Skywatcher Esprit 100/550 ED, Skywatcher Flattener, Baader CMOS-optimized Ha 6.5nm / QHY268M
OAG with Lodestar X2
Mount AZ EQ6 GT
Image acquisition: CdC, NINA, PHD2, dithering
Ha: 15 x 600s, mode 1, gain 56, offset 10, -5C, 20 flats, 50 bias, 20 darks
Data calibration/integration: PixInsight
Image processing: PixInsight, Lightroom

Has been down before, of course, in 2019. ;-)