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Collinder 304

NGC 6152

Open star cluster in Norma

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Proper Name	None
Messier Number	None
NGC/IC Number	NGC 6152
Other Designations	Collinder 304
Constellation	Norma
Right Ascension	16h 32m 51s
Declination	-52° 37' 44"
Distance	c.5,000 light years c.1,500 parsecs
Magnitude	Apparent: +8.10 Absolute: -2.83
Diameter	Apparent: 25' Actual: 36 light years
Number of Stars	c. 1,100
Optimum Visibility	June (Usually visible from southern latitudes)

An open or galactic star cluster that falls with just within the eastern borders of Norma, where that constellation runs against neighbouring Ara. Collinder 304 is a populous cluster containing about 1,100 stars, and lies about five thousand light years from the Solar System.

Imagery provided by Aladin sky atlas

As seen from Earth, the cluster appears against a dense part of the band of the Milky Way as it passes through Norma and Ara (representing a minor arm of the Galaxy known as the Norma Arm). This means that the cluster's stars can be difficult to distinguish from a background busy with the stars of the Milky Way.

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Norma

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