M12 NGC 6218

Object Type Globular Cluster
Constellation Ophiuchius
Magnitude 6.1
Size 16.0' x 16.0'

M12 is one of several large and bright globular clusters in Ophiuchius, that are visible to the naked eye from a dark location. The outer regions are readily resolved in an 8" telescope.

Film Images


35 minutes exposure, Fuji Superia 400 film.
5" f/5 refractor, prime focus.

DSLR Images


Combination of 25, 60 second images. Modified Canon Digital Rebel DSLR camera.
5" f/5 refractor at prime focus.

CCD Images


10, 1 minute exposures. SBIG ST9E CCD.
10" f/6.3 schmidt-cassegrain prime focus.


Combination of 10, 3 minute images. SBIG STL-1001E CCD.
20" f/6.8 cassegrain at prime focus.