AstroPhotography by Dan Richey

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M 12
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M 12

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Messier 12 or M 12 (also designated NGC 6218) is a globular cluster in the constellation of Ophiuchus. Nick name is "Gumball" cluster. It was discovered by the French astronomer Charles Messier on May 30, 1764, who described it as a "nebula without stars". In dark conditions this cluster can be faintly seen with a pair of binoculars. Resolving the stellar components requires a telescope with an aperture of 8 in (20 cm) or greater. In a 10 in (25 cm) scope, the granular core shows a diameter of 3′ (arcminutes) surrounded by a 10′ halo of stars.

Object Information

Name M 12
Type Globular Clusters
Constellation Ophiuchus
Catalogue NGC 6218

Acquisition / Processing

Exposure LRGB: 48 : 24 : 24 : 24 Minutes
Total 2.0 Hours
Telescope AP 160 EDF - FF @ f7.7
Camera SBIG STT-8300
Camera Temp -35ºC
Guiding SIG STT-83 Internal
Mount AP 1100 GTO
Filters Astrodon II LRGB
Processing PixInsight
Adobe PhotoShop / LightRoom
Location San Pedro Creek
Date June 18, 2018

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