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Collinder 317

Melotte 155, NGC 6242

Open Cluster in Scorpius

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Proper Name	None
Messier Number	None
NGC/IC Number	NGC 6242
Other Designations	Collinder 317, Melotte 155
Constellation	Scorpius
Right Ascension	16h 55m 31s
Declination	-39° 28' 26"
Distance	c.4,400 light years c.1,300 parsecs
Magnitude	Apparent: +6.40 Absolute: -4.23
Diameter	Apparent: 9' Actual: 11.4 light years
Number of Stars	c. 900
Optimum Visibility	June

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