Panoramic View from Bollerberg

Hochsauerlandkreis, Germany, 758 m

Date:	26.12.2022	Time:	21:00 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:	Bollerberg, Hochsauerlandkreis, Germany	Author:	Till Credner

It was a cold and stormy Christmas night. The brightness in the zenith was down to 21.2 mag per arcsecond² at about 23:00 CET, 26.12.2022 in clear patches between the brighter clouds. This is 2.1 times more bright than the natural clear and moonless sky due to light pollution. Therefore the sky is brightened by 110 % by the lights of Hesborn, Medelon, Medebach and Winterberg. A lot of light pollution is produced by a wood company in Bromskirchen. Measurements were obtained with SQM-LU-DL, serial number 2030.