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Ptolemys Cluster (M7, NGC6475)


Ptolemys Cluster is an open cluster object of interest in space. It lies at a distance of 0.65-1.31 light years away in the constellation of Scorpius. It is referred to as M(7) when it was catalogued by Charles Messier in 18th - 19th Century France. It is referred to as NGC(6475) in the New General Catalogue. This is a list of deep space objects that was compiled by John Louis Emil Dreyer in 1888 in an update to John Herschel earlier catalogue. Ptolemys Cluster was discovered in 130AD by Ptolemy. The Open Cluster's location is 17:53.9 (R.A.) and -34:49 (Dec.). Its Visual Brightness is a 3.3 Magnitude and has an apparent magnitude of 3 with an apparent dimension of 80.0 .

Ptolemys Cluster (M7,NGC6475) is a open cluster. It was discovered in 130AD by Ptolemy. It's location is RA(17:53.9), Dec(-34:49) and its distance is calculated 0.65-1.31 light years away. Its visual Brightness is 3.3. Its apparent dimensions measured in arcmins is 80.0.

Fact File


NamePtolemys Cluster
TypeOpen Cluster
Messier Id7
NGC Id6475
ConstellationScorpius
TypeOpen Cluster
Right Ascension17:53.9
Declination-34:49
Distance (Lt.Yr)0.65-1.31
Visual Brightness3.3
Apparent Dimension80.0
Apparent Magnitude3
Year of Discovery130AD
DiscovererPtolemy