Celestial Objects

Ptolemy Cluster

Star Clusters

Citation Formats

General Reference

Space and Astronomy Atlas. "Ptolemy Cluster." Accessed September 2, 2026. https://space.interactiveatlas.org/celestial-objects/messier-7.

APA Style

Space and Astronomy Atlas. (n.d.). Ptolemy Cluster. Retrieved September 2, 2026, from https://space.interactiveatlas.org/celestial-objects/messier-7

BibTeX

@misc{spaceandastronomyatlas-ptolemy-cluster,
  author = {Space and Astronomy Atlas},
  title = {Ptolemy Cluster},
  year = {2026},
  url = {https://space.interactiveatlas.org/celestial-objects/messier-7},
  note = {Accessed September 2, 2026}
}

The Ptolemy Cluster, catalogued as Messier 7 and also designated NGC 6475, is an open star cluster in the constellation Scorpius, close to the tail's stinger, and is easily seen with the naked eye. At a declination of about minus 34.8 degrees it is the southernmost object in Messier's catalogue.

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