Globular Cluster M2 (NGC 7089), class II, in Aquarius

RA 21:33.5 (h:m); DEC -00:49 (deg:m); Distance 37.500 light years
Visual Brightness 6.5 (mag); Apparent Dimension 16.0 (arc min)

M2 has a diameter of about 175 light-years, contains about 150,000 stars, and is one of the richer and more compact globular clusters, as its classification in density class II indicates.
At about 37,500 light years (according to W.E. Harris' database), it lies well beyond the Galactic Center.
With its visual magnitude of 6.5 mag, M2 is a difficult object for naked-eye observing (just not visible under "average" conditions), but an easy target for the slightest optical aids like binoculars or opera glasses.

Source and more: SEDS


October 12, 2008 18:37 - 19:14 UT.
Imaging: William Optics Zenithstar 80 ED II APO at f/6.8 [focal length 545 mm], ATK16IC camera, Astronomik LRGB filters.
Exposures: L: 10x120s [1x1]; RGB: 5x60s [2x2], unguided.

September 13, 2003 21:24 - 21:59 UT.
Imaging: TAL-2M 6 inch f/8, with Focal Reducer @ f 4.6, Vesta Pro SC3a Colour, no filters, exposure 60x30 seconds, unguided

August 25, 2003 23:06 - 23:36 UT.
Imaging: TAL-2M 6 inch f/8, with Focal Reducer @ f 4.6, Vesta Pro SC3a Colour, Baader Infrared Blocking Filter, exposure 40x25 seconds

September 29, 2002 20:56 UT.
Imaging: TAL-2M 6 inch scope, Focal Reducer, Vesta Pro-SC1, 10 x 10 secs exposure.