Object:	M4- Globular Cluster in Scorpius RA= 16hrs 23 min; Dec = -26 deg 31 min
Date & Site:	Imaged on 5/28/17; Little Blair Valley, CA Conditions: temps in the low 60's; calm; very good seeing
Equipment:	Telescope: TEC 140 Refractor, 980mm at f/7 Guider: Internal guider Mount: AP 1100 CP3 Camera: ST-10XME; CFW10; Astrodon L RGB Gen II filters
Notes:	Exposures: 60 minutes of lum and 30 minutes each RGB (5 min subexposures) for total of 2.5 hours M4 spans 75 light years across and is one of the closest globular clusters to our solar system. It has an estimated age of 12.2 billion years. 7,200 light years away (image reduced to 60% of original size) FOV = 43 x 34 arc minutes Back to Images