M13 the Great Cluster in Hercules

Photographer
Paul Winn
Email
stargazing@astrolights.net
Location of photo
Cachuma Lake, Ca (Santa Barbara County)
Date/Time of photo
8/09/2013
Equipment
Telescope: Astrotech 111mm @ f/7 CCD: QHY10 CCD Camera Mount: Skywatcher AZ-EQ6 SynScan GPS Image: 12 x 10 min, 2 Hours Guider: Orion 80mm f/5, QHY5L
Description
Messier 13 (M13), also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of about 300,000 stars in the constellation of Hercules M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764. It is located at right ascension 16h 41.7m and declination +36° 28'. With an apparent magnitude of 5.8, it is barely visible with the naked eye on a very clear night. Its diameter is about 23 arc minutes and it is readily viewable in small telescopes. Nearby is NGC 6207, a 12th magnitude edge-on galaxy that lies 28 arc minutes directly north east. A small galaxy, IC 4617, lies halfway between NGC 6207 and M13, north-northeast of the large globular cluster's center.
All comments must follow the Sky & Telescope Terms of Use and will be moderated prior to posting. Please be civil in your comments. Sky & Telescope reserves the right to use the comments we receive, in whole or in part, and to use the commenter’s username, in any medium. See also the Terms of Use and Privacy Policy.

COMMENT

This site uses Akismet to reduce spam. Learn how your comment data is processed.