© James Janusz 2000 thru 2018 All Rights Reserved
Telescope: Astro-Physics 160EDF Designation:Messier 4 or M4 (also designated NGC 6121) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1745 and catalogued by Charles Messier in 1764. It was the first globular cluster in which individual stars were resolved. M4 is conspicuous in even the smallest of telescopes as a fuzzy ball of light. It appears about the same size as the Moon in the sky. It is one of the easiest globular clusters to find, being located only 1.3 degrees west of the bright star Antares, with both objects being visible in a wide-field telescope. Modestly sized telescopes will begin to resolve individual stars, of which the brightest in M4 are of apparent magnitude 10.8. Also in the image is the globular cluster NGC6144 in the upper left.
Mount: Astro-Physics AP1600 GTO Constellation: Scorpius
Camera: SBIG STX 16803 with Astrodon Ver. 2 Filters Remotely Imaged With CCD Commander
Guiding:SBIG ST402 Guider Type: Globular Cluster
Exposure Data: RGB 80 minutes each. Position: R.A. 16 hr 25 min , Dec -26 34
Processed using Maxim data aquisition, PixInsight and PhotoShop image processing Date: January 2017
Data Acquisiton, Reduction and Processing by Jim Janusz Imaging Location: Cave Creek Canyon Observatory