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.
|Bortle Scale / SQM-L||Bortle 5 / SQM 19.8-20.02|
|Primary Scope||CCA 250/1250|
|Mount||AP 1100 GTO|
|Total Exposure Time||1H|
|Location||Val Imagna (Bergamo) Italy|
© Efrem Frigeni Astrophoto