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  • Messier 4
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  • Messier 4 or M4 (also designated NGC 6121) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1746 and catalogued by Charles Messier in 1764. It was the first globular cluster in which individual stars were resolved.
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epoch
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credit
Age
  • 4.102488E17
Constellation
Name
  • M 4
Caption
  • Messier 4 by Hubble Space Telescope; 3.5′ view
dist pc
  • 2.200000
Names
  • NGC 6121
dist ly
  • 7.2
radius ly
  • 35
Class
  • IX
Notes
  • 1
appmag v
  • +7.12
size v
  • 36
abstract
  • Messier 4 or M4 (also designated NGC 6121) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1746 and catalogued by Charles Messier in 1764. It was the first globular cluster in which individual stars were resolved.