Star Clusters

M13 Hercules Globular Cluster

Magnitude: 5.8
Distance: 22.200 ly
Size: 168 ly
Age: ~
# Stars: several hundred thousands
Constellation: Hercules

Discovered by Edmond Halley in 1714, and cataloged by Charles Messier on June 1, 1764 into his list of objects not to mistake for comets: Messier’s list.

Telescope: Skywatcher Esprit 120 ED f/7
Mount: Skywatcher HEQ 5 pro
Camera: Moravian G2 8300
Filter: LRGB
Acquisition Date: 2020-06-26 
Last processed: 2021-01-02
Exposure:

M15 Pegasus Globular Cluster

Magnitude: 6.2
Distance: 33.600 ly
Size: 175 ly
Age: ~ 12 billion years
# Stars: ~ 100.000
Constellation: Pegasus

Discovered by Jean-Dominique Maraldi in 1746 and included in Charles Messier’s catalogue of comet-like objects in 1764.

Telescope: Skywatcher Esprit 120 ED f/7
Mount: Skywatcher HEQ 5 pro
Camera: Moravian G2 8300
Filter:
Date: 
Exposure:

NGC 869 – 884 Double Cluster Persei

Magnitude: 3.7 – 3.8
Distance: 7.500 ly
Size: 175 ly
Age: ~ 12 .8 million years
# Stars: ~
Constellation: Cassiopeia

Discovered by William Herschel was the first to recognize the object as two separate clusters. The Double Cluster is not included in Messier’s catalog, but is included in the Caldwell catalogue of popular deep-sky objects.

Telescope: Skywatcher Esprit 120 ED f/7
Mount: Skywatcher HEQ 5 pro
Camera: Moravian G2 8300
Filter: Ha
Date: 2020-09-03 
Exposure: 40 x 60″