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Ptolemys Cluster (M7, NGC6475) Facts

Ptolemys Cluster (M7, NGC6475) is an open cluster object of interest in space. It lies at a distance of 0.65-1.31 kly 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 also 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.

The Open Cluster's location is 17:53.9 (R.A.) and -34:49 (Dec.). Its Visual (Apparent) Brightness is 3.00 Magnitude with an apparent dimension of 80.0 . The object can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

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 (M7, NGC6475)
TypeOpen Cluster
Messier Id7
NGC Id6475
ConstellationScorpius
Right Ascension17:53.9
Declination-34:49
Distance (Lt.Yr)0.65-1.31 kly
Apparent Dimension80.0
Visual / Apparent Magnitude3.00
Naked Eye VisibleYes - Magnitudes
Year of Discovery130AD
DiscovererPtolemy


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