Gallery News


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





 © Efrem Frigeni Astrophoto

Download Free FREE High-quality Joomla! Designs • Premium Joomla 3 Templates