M 15 - Globular Cluster in the constellation Pegasus

Messier 15 is one of the densest globular clusters in our Galaxy. Half of the cluster's mass is concentrated within the central 10 light years. About 30,000 stars have been found in the inner 22 light-years. A moderately heavy black hole with about 4,000 solar masses is assumed to be in the center.

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Optics: Astro Physics EDF
Aperture:130 mm
Focal Length: 870 mm
Camera: ZWO ASI071MC
Exposure: 40 x 300 s
Location: Chamaeleon Observatory, Onjala Lodge, Namibia
Processing: Deep Sky Stacker, Nebulosity, Photoshop
Diameter:175 light years
Distance:34,000 light years
annotated image

image field in the sky