M12 = NGC6218 ( 16h 47.2m -1°57´, 6.6 mag )
This loose globular cluster in Ophiuchus was discovered by Messier on May 30, 1764. It is located approx. 18,000 ly away and measures 97 ly across. It is visible in binoculars about 5°40' SE of l Ophiuchi (see finder chart below).
The above image was taken on May 29, 1998 from Sooke, BC. Cookbook 245 LDC CCD camera was used on Ultima 8 f6.3 telescope autoguided with Cookbook 211 LDC CCD camera on piggybacked 500mm f8 telephoto lens. It is composed of white integrations (5 x 2 min.) processed with AIP4WIN.
North is to the right.
Map created in Guide 7.0 - 7°45' x 10°. North is up.
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© Jan Wisniewski