Jon Greif
Location of photo
Auberry, California, USA (iTelescope Remote Site, Sierra Nevada Mountains
Date/Time of photo
August 23 at 11:00 PDT
PlaneWave CDK 622 mm (24 inch) Reflector, one shot 300 sec Luminance Monochrome image.
Messier 56 (also known as M56) is a globular cluster in the constellation Lyra, discovered by Charles Messier on January 19, 1779. The brightest stars in this cluster are so faint (magnitude 13) that a large aperture telescope is needed. M56 is about 32,900 light-years from Earth and measures roughly 84 light-years across, with a combined mass some 230,000 times that of the Sun. M56 has an estimated age of 13.7 billion years and is following a retrograde orbit through the Milky Way. The relative velocity of the cluster is about 177 km per sec, which is sufficient to heat the medium in its wake to a temperature of 940,000 K.
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