1987年以来云南天文台夜天亮度的变化

摘要

Using the CCD data obtained at the 1-m reflector of Yunnan Observatory from 1987 till 2009, the variation of the night sky brightness has been measured. Due to the development of the Kunmin city, the night sky brightness in V has increased from about 21 mag/( ″) ~2 to brighter than17.6 mag/ (″)~2, i. e. the night sky has brightened up for more than 30 times since 1987.%使用云南天文台1m望远镜自1987至2009年所拍摄的CCD资料,测定了22年来该台站夜天亮度的变化.结果表明,在此期间由于昆明市的快速发展,Ⅴ波段的夜天亮度从约21mag/(")~2变到亮于17.6mag/(")~2,变亮超过30倍.