Object Name: Messier 103 Alternative Designations: M103, NGC 581 Object Type: Type D Open Cluster Constellation: Cassiopeia Right Ascension: 01 : 33.2 (h:m) Declination: +60 : 42 (deg:m) Distance: 8.5 (kly) Visual Brightness: 7.4 (mag) Apparent Dimension: 6.0 (arc min) Locating Messier 103: Locating M103 is fairly easy even under moderately light polluted conditions. Simply … Continue reading Messier 103