Panoramic View from Heroldstatt Tower

Swabian Jura, Southern Germany, 810 m + 30 m

Date:	02.08.2021	Time:	22:00 UT (CET-1h)
Exposure:	21 x 20s	Field of view:	360^o x 180^o
Camera:	Canon EOS1D IV at ISO 3200	Optics:	15mm, f/2.8
Place:	Ennabeuren, Southern Germany	Author:	Till Credner

The brightness in the zenith was down to 21.22 mag per arcsecond² at about 23:50 CET, 02.08.2021. 21.22 mag per arcsecond² is 2 times more bright than the natural clear and moonless sky. This is due to light pollution and the milky way in the zenith at this time. Therefore the sky is brightened by 100 %. Measurements were obtained with SQM-LU-DL, serial number 2030. Strongest sources of light pollution are the cities of Stuttgart and Ulm, about 50 and 30 km distant, respectively. Some direct light of uncomplete shielded sources is from companies at Heroldstatt-Sontheim.