Object: NGC 581 (*)
Open Cluster, type III2p, in Cassiopeia Right Ascension (2000.0): 01:33:23.0 (h:m:s) Declination (2000.0): +60:39:00 (deg:m:s) m_v: 7.4 (mag) Dimension: 6.00 (arcmin) Cross Identifications: M 103, OCL 326