M56 - Globular Cluster in Lyra

M56 RGB

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M56 - Globular Cluster in Lyra
Mag 8.3, 8.8 arcminutes across
RA 19:17 Dec 30 12'
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This from SEDS.ORG: Discovered by Charles Messier in 1779.

M56 is located about half-way between Beta Cygni (Albireo) and Gamma Lyrae. It is one of the less bright Messier globulars, especially lacking the bright core which most globulars have. Nevertheless it is not too difficult to resolve, even at its rather large distance. At its distance of 32,900 light-years. its diameter of 8.8 arc minutes corresponds to a linear extension of about 85 light years. Visually, only about the inner third of this great ball, of about 3' diameter is visible.

This stellar swarm is approaching us at the high velocity of 145 km/sec.

M56 was one of Charles Messier's original discoveries; he saw it first on January 23, 1779 and describes it as a "nebula without stars," like most globular clusters. It was first resolved into stars by William Herschel around 1784.

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Scope: Planewave 12.5" CDK
Mount: Paramount ME (MKS5000)
Camera: Apogee U16M w Astrodon Gen II RGB
Ambient temp +10C; camera temp -20C; Moon approaching 1st Qtr
Images acquired with TheSkyX and CCD-Commander
Calibration and channel stacks in Maxim IP
Assembled in PixInsight

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