Acumen is at 28°45′ Sagittarius with an orb of 1°00′ Fixed star Acumen, M7 Scorpius, is an open cluster of stars above the sting of the Scorpion, Scorpius Constellation. Acumen is a companion cluster to Aculeus, the Butterfly Cluster. M7, or Messier 7, is also known as the Ptolemy Cluster. M7 was first recorded by the 1st-century Greek-Roman astronomer Ptolemy, […]
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