AstroPhotography by Dan Richey

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Messier 53 (also known as M53 or NGC 5024) is a globular cluster in the Coma Berenices constellation. It was discovered by Johann Elert Bode in 1775. M53 is one of the more outlying globular clusters, being about 60,000 light-years (18.4 kpc) light-years away from the Galactic Center, and almost the same distance (about 58,000 light-years (17.9 kpc)) from the Solar system. The cluster has a core radius (rc) of 2.18 pc, a half-light radius (rh) of 5.84 pc, and a tidal radius (rtr) of 239.9 pc.[8] This is considered a metal-poor cluster and at one time was thought to be the most metal-poor cluster in the Milky Way.

Object Information

Name M53
Type Globular Clusters
Constellation Coma Berenices
Catalogue NGC 5024 and NGC 5053

Acquisition / Processing

Exposure LRGB acquisition in MaximDL
L - 300 sec x 21
R - 300 sec x 10
G - 300 sec x 10
B - 300 sec x 10
Total 4.25 Hours
Telescope AP 160 EDF - TC @ f5.7
Camera SBIG STL-11
Camera Temp -20ÂșC
Guiding SBIG STL-11 RGH
Mount AP 1100 GTO
Filters Astrodon II LRGB
Processing PixInsight processing.
LightRoom and PhotoShop for final adjustments.
I noted that even at the subframe level, there are halos around the stars. I took this to be ringing, but the deringing process in PixInsight is intended to prevent ringing (found in
Location San Pedro Creek
Date May 19, 2018

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