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Basic Parameters of NGC581/M103 (WEBDA):

• Right Ascension (2000): 01 33 23
• Declination (2000): +60 39 00
• Galactic longitude: 128.053
• Galactic latitude: -1.804
• Distance [pc]: 2194
• Reddening [mag]: 0.382
• Distance modulus [mag]: 12.89
• Log Age: 7.336

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Gamma Doradus stars

• NGC581 V3
• Sp. Type: A9/F0 V
• V [mag]: 8.17

• NGC581 V4
• Sp. Type: -
• V [mag]: 13.70
• References:
• Wyrzykowski, L.; Pietrzynski, G.; Szewczyk, O. 2002, AcA, 52, 105: Variable Stars in the Field of Young Open Cluster NGC 581