M53 (Messier 53, NGC 5024, Melotte 117) Globular Cluster in Coma Berenices


12" RC - LRGB

      Size: 1400 px    
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© Velimir Popov & Emil Ivanov 2013

Globular star cluster Messier 53 (M53, NGC 5024) is one of the more outlying globulars. According to Recio-Blanco et al.(2005), the distance of M53 is 61 270 light years making it one of the more distant globulars of the Milky Way Galaxy. At this distance, its apparent angular diameter of 13' corresponds to a linear diameter of roughly 230 light years.

As in all globular clusters, the stars of M53 are apparently "metal-poor", which means that they contain only little quantities of elements heavier than helium. Most of the stars in M53 are older and redder than our Sun, but some enigmatic stars appear to be bluer and younger. M53 contains the considerably respectable number of 47 known RR Lyrae variables, some of them were reported to have changed their periods irreversibly with time.

Object details

Right Ascension 13:12:55.3 (h:m:s)
Declination +18:10:09 (deg:m:s)
Distance ~ 61,270 (кly)
Apparent Dimension 13 x 13 (arc min)

Image details:


Center of field RA 13:12:51.327 (h:m:s)
Center of field DE +18:09:57:318 (deg:m:s)
Size 24.4 x 24.4 (arcmin)
Pixel scale: 1.04 (arcsec/pixel)
Orientation: North is up
Charts and image details obtained from Astrometry.net
Optic(s): RC 12" with Astro-Physics corrector @ f/5 (RC)
Mount: ASA DDM85 Premium
Camera: ATIK 4000 M
Filters: Astronomik II: Lum, Red, Green, Blue, Ha, OIII and SII
Dates/Times: 4.03.2013
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L: 4x3 min, R: 4x3 min, G: 4x3 min, B: 4x3 min
  Bin 1, Total Exposure Time - 48 min
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013. All Rights Reserved
e-mail: info@irida-observatory.org
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