m3

m3 Globular cluster

This Globular cluster is one of the largest and brightest, and is made up of around 500,000 stars.
It is estimated to be 11.4 billion years old . It is located at a distance of about 33,900 light-years away from Earth.

Many amateur astronomers consider it one of the finest northern globular clusters.
M3 has an apparent magnitude of 6.2, making it a difficult naked eye target even with dark conditions.
With a moderate-sized telescope, the cluster is fully defined.

Technical Data

Bortle Scale / SQM-L	Bortle 5 / SQM 19.8-20.02
Period	May, 2020
Primary Scope	CCA 250/1250
Camera	IMX455
Mount	AP 1100 GTO
Total Exposure Time	1H
Composition	LRGB
Location	Val Imagna (Bergamo) Italy