M 53 (NGC 5024, GCL 22) Globular Cluster in Coma Berenices
Located at: RA 13 hours 12 minutes 55 seconds, Dec +18 degrees 10 minutes 09 seconds
Size: 13' Magnitude: 7.7 Class: 5
North is up
West to the right
14.5" f5 Newtonian reflector
ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56
Lumicon Red filter, 380 minutes (38 x 10 minute subs), 05/1/2/2014; seeing 2.3-4.1 FWHM per CCDStack
CCDStack 2.77.5159.19820, Photoshop CS5.1
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)
This 'bright' Globular Cluster in Coma Berenices is located just under one degree WNW from the fainter, more open, globular cluster NGC 5053. See this wonderful color image of the pair by Eric Africa.
I tried 10 minute subs on this globular, to try to record the fainter 'envelope' of stars. See the 8" version of M 53.
From the NGC / IC Project:
Contemporary Visual Observation(s) for NGC 5024
NGC 5024 = M53 13 12 55.2 +18 10 09 V = 7.5; Size 12.6 17.5" (5/27/00): at 220x this moderately bright GC appears 6'-7' diameter with a very bright 2' core and ~50-60 stars resolved. At 380x, perhaps 75 stars are resolved, mostly in the outer halo and an edges of the small, bright, concentrated core. A brighter mag 12 star is just NE of the core, but most of the resolved stars are mag 13.5-15. The halo is fairly rich, but unevenly distributed with more stars resolved on the north side. Towards the edges of the halo the globular thins out and is straggly with a maximum diameter 8'-9'. 17.5": at least 50 stars resolved mostly in the outer halo which reaches 6' diameter. Contains a very bright core which is very mottled. Many stars are superimposed over the core. 13": outer halo of faint stars resolved. - by Steve Gottlieb