Best of AOP - Star Clusters

M22

M22 is a truly spectacular example of a star cluster since it is very near and, as we view it, toward the center of the galaxy. Thus, when M22 is observed we see hundreds of thousands of its constituents as well as a myriad of stars in the foreground and background. The ultimate of stars upon stars. M22 is estimated to be 10,000 light years away and around 65 light years across. This cluster can be seen easily in binoculars near the star atop the "teapot" asterism of Sagittarius.

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Last Updated: 25-Jun-2014

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Sky Location:

About This Image

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Equipment

20in RC Optical Systems telescope Operating at f/5.5

Paramount ME Robotic Telescope Mount

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

Two iterations of L-R deconvolution (sharpening) algorithm using CCDsharp were applied to the luminance image.

Digital Development (DDP) via Maxim/DL was also used in order to display the very dim and very bright details of

the image simultaneously.

Luminance = 10 minutes binned 1x1

Red = 5 minutes binned 1x1

Green = 5 minutes binned 1x1

Blue = 10 minutes binned 1x1

Minimum credit line: Doug Matthews/Adam Block/NOAO/AURA/NSF