Night Sky Brightness Data

Notes: the real time data are updated once every 5 minutes by the median values of the night sky brightness of the past 15 minutes; the past data are the median values of last night; the values displayed are not correct for the light attenuation due to the application of the housing's glass (according to the specification provided by the manufacturer, Unihedron, the offset is -0.11 mag arcsec-2)


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