Screenshot on my phone using the Light pollution map app where I conducted a star party in a Bortle 9 sky.
Light pollution map is a mapping application that displays VIIRS/World Atlas/Clouds/Aurora overlays and IAU observatories/SQM/SQC user measurements features over Microsoft Bing base layers (road and hybrid Bing maps). The primary use is to show VIIRS data in a friendly manner, but over time it also included some other interesting layers that concern light pollution like SQM/SQC, World Atlas 2015 zenith brigtness, clouds, aurora and IAU observatories
Data credits:
VIIRS: Earth Observation Group, NOAA National Geophysical Data Center.
Aurora 30min forecast: NOAA.
Clouds: EUMETSAT, NOAA, MOSDAC/SAC/ISRO and CIRA.
Observatories: Wikipedia (updated: 16.01.2021).
World Atlas 2015: Falchi, Fabio; Cinzano, Pierantonio; Duriscoe, Dan; Kyba, Christopher C. M.; Elvidge, Christopher D.; Baugh, Kimberly; Portnov, Boris; Rybnikova, Nataliya A.; Furgoni, Riccardo (2016): Supplement to: The New World Atlas of Artificial Night Sky Brightness. GFZ Data Services. http://doi.org/10.5880/GFZ.1.4.2016.001
Falchi F, Cinzano P, Duriscoe D, Kyba CC, Elvidge CD, Baugh K, Portnov BA, Rybnikova NA, Furgoni R. The new world atlas of artificial night sky brightness. Science Advances. 2016 Jun 1;2(6):e1600377.
I am asked to do star parties rain or shine. Yes, you read that right. I've even done a star party in a Bortle 9 light pollution sky in the park across the street from the Texas Capitol building in Austin. I saw 4 stars, three of which were the summer triangle, and one was the Sun before sunset.🧪🔭