M28 = NGC6626 ( 17h 24.5m -24°52´, 6.9 mag. )
This small globular star cluster in Sagittarius was discovered by Messier on July 27, 1764. It is about 15,000 ly distant and measures 65 ly across. M28 is visible in binoculars just 1° NW of l Sagittarii (see finder chart below).
The above image was taken on July 12, 1999 from Sooke, BC. Cookbook 245 LDC CCD camera was used on Celestron Ultima 8 f6.3 telescope autoguided with Cookbook 211 LDC CCD camera on a piggybacked 500mm f8 telephoto lens. Eight white exposures (120 sec. each) as well as cyan, magenta and yellow-integrations (4 x 120 sec. each) were combined in AIP4WIN and the resulting color image was further adjusted in Lab color space with Corel PhotoPaint 8.
North is to the right.
Map created in Guide 7.0 - 7°45' x 12°. North is up.
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© Jan Wisniewski