Deep space
Ptolemy's Cluster
Open cluster · M7 · NGC 6475
Open cluster in Scorpius
Photo: Credit: ESO · CC BY 3.0 · Wikimedia Commons
Messier 7 or M7, also designated NGC 6475 and sometimes known as Ptolemy's Cluster, is an open cluster of stars in the constellation of Scorpius. The cluster is easily detectable with the naked eye, close to the "stinger" of Scorpius. With a declination of −34.8°, it is the southernmost Messier object.
Description from Wikipedia (CC BY-SA 4.0).
In your sky
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Key facts
Distance
~650–1,310 light-years
Apparent mag.
+3.3
Apparent size
80′
Best seen with
Naked eye
Catalogue
M7 · NGC 6475
Did you know
- Listed as Messier 7 in the Messier catalogue, also known as NGC 6475.
- Found in the constellation Scorpius.
- Bright enough to see with the naked eye.
