Panoramic View from Feldberg

Black Forest, Germany, 1493 m

Date:	29.01.2023	Time:	4:45 UT
Exposure:	10 x 15 s and 11 x 30 s downward	Field of view:	360^o x 180^o
Camera:	Canon EOS1D IV at ISO 3200	Optics:	15 mm, f/2.8 and f/4.0 downward
Place:	Feldberg, Black Forest, Germany	Author:	Till Credner

It was a chilly cold night with -10 degrees Celsius. Dense fog covered the mountain until about 5:30 CET. But as promised, the clouds settled a bit and the peak of Feldberg set free. The brightness in the zenith was down to 21.33 mag per arcsecond² at about 5:45 CET, 29.01.2023. This is 1.85 times more bright than the natural clear and moonless sky due to light pollution. Therefore the sky is brightened by 85 % by the lights of Strasbourg, Mulhouse, Basel, Zürich, Freiburg and the weather stations close by. Measurements were obtained with SQM-LU-DL, serial number 2030.