CCD photometry and astrometry of double stars

We present new astrometric and photometric data for 253 visual double stars of the "intermediate" class, i.e. with angular separations in the range 1 to 15 arcsec. The...我们公布了253颗属于"中等间距"类别的目视双星的新型天体测量与测光数据，此类双星的角间距范围为1至15角秒（arcsec）。