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NGC 6558
Globular cluster in the constellation of Sagittarius From Wikipedia, the free encyclopedia
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NGC 6558 is a globular cluster, located about 24,000[4][a] light years away in the constellation Sagittarius. Its apparent magnitude is about 11 and its apparent diameter is about 10 arcminutes.[2] The globular cluster was discovered in 1784 by the astronomer William Herschel with his 18.7-inch telescope and the discovery was later catalogued in the New General Catalogue.
It is located 1.5 degrees south-southeast of Gamma2 Sagittarii.
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