Valley of the Danube at Night

Knopfmacherfelsen, Fridingen, Swabian Jura

Date:	22.11.2025	Time:	19:28 CET
Exposure:	9 x 13 s, 10 x 40 s	Fiel of view:	360° x 180°
Camera:	Lumix S5IIX	Optics:	18 mm f/2.5 and f/4.0
Place:	Fridingen, Swabian Jura, Germany	Photo:	Till Credner

The brightness in the zenith was 20.84 mag/arcsec² at the time of the above photography, 19:28 CET, 22.11.2025. The darkest measured value was 21.03 mag/arcsec² at 22:13 CET, however, the measurement ended at this time. 21.03 mag/arcsec² is still a factor of 2.44 brighter than a natural dark night sky due to the light pollution by Fridingen closeby and the cities of Balingen, Albstadt and Stuttgart in the northern direction. Measurements were obtained with SQM-LU-DL, serial number 2030.