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Basic Parameters of NGC 6231 (WEBDA):

• Right Ascension (2000): 16 54 10
• Declination (2000): -41 49 30
• Galactic longitude: 343.464
• Galactic latitude: 1.184
• Distance [pc]: 1243
• Reddening [mag]: 0.439
• Distance modulus [mag]: 11.83
• Log Age: 6.843

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SPB stars

• NGC6231 SBL275 (V1198 Sco)
• Sp. Type: B4.5V
• V [mag]: 11.888

• NGC6231 SBL394 (V1201 Sco)
• Sp. Type: O7.5
• V [mag]: 10.599

• NGC6231 SBL461 (V1206 Sco)
• Sp. Type: B1.5V
• V [mag]: 10.745
• References:
• T. Arentoft, C. Sterken, M.R. Knudsen et al. A&A 380, 599, 2001: A search for new variable stars in NGC6231.