The night sky brightness at Potsdam-Babelsberg
The night sky brightness at Potsdam-Babelsberg ranges from 16.5 to 20.3 mag/arcsec². The latter (best) value corresponds to 4.7 times the natural zenithal night sky brightness. This result was found by the authors of a recently published article, which is available through the ArXiv preprint server.
Based on a two year dataset of measurements of the Leibniz Institute for Astrophysics in Potsdam (AIP), the influence of clouds, the moon and other factors on the night sky brightness are discussed. It is shown that Potsdam-Babelsberg, despite its proximity to Berlin, still shows a circalunar periodicity of the night sky brightness, although it is much weaker than naturally. The light-pollution-enhancing effect of clouds dominates the night sky brightness by far.