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| Description of NGC 6637 |
Messier 69 (also known as M69 or NGC 6637) is a globular cluster in the constellation Sagittarius. It was discovered by Charles Messier in August 31, 1780, the same night he discovered M70. At the time, he was searching for an object described by LaCaille in 1751-2 and thought he had rediscovered it, but it is unclear if LaCaille actually described M69.
M69 is at a distance of about 29,700 light-years away from Earth and has a spatial radius of 42 light-years. It is a close neighbor of Globular Cluster M70, 1,800 light-years separating the two objects, and both these clusters lie close to the Galactic Center.
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Image of the cluster from the Digital Sky Survey |
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(0 comments in the database at the moment) | Selected biblio  | | Paper n. 1 |
Heasley, J. N.; Janes, K. A.; Zinn, Robert; Demarque, Pierre; Da Costa, Gary S.; Christian, Carol A.
Hubble Space Telescope Photometry of the Metal-rich Globular Clusters NGC 6624 and NGC 6637
The Astronomical Journal, Volume 120, Issue 2, pp. 879-893 (2000)
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