http://gallery.cuttinedgeobservatory.com/v/globulars/M13/
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's center.

M13 is about 145 light-years in diameter, and it is composed of several hundred thousand stars, the brightest of which is the variable star V11 with an apparent magnitude of 11.95. M13 is 25,100 light-years away from Earth.]]> en-us Gallery 2 RSS Module, version 1.1.8 Fri, 22 May 2026 07:29:40 +0000 120 http://gallery.cuttinedgeobservatory.com/d/1489-12/M13.jpg http://gallery.cuttinedgeobservatory.com/v/globulars/M13/ http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13-location2.tiff.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13-location2.tiff.html
Galactic Location: Target VS Sun]]> Chris Johnson photo Wed, 26 May 2010 00:00:26 +0000 http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13-location1.tiff.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13-location1.tiff.html
Galactic Location: Target VS Sun]]> Chris Johnson photo Wed, 26 May 2010 00:00:26 +0000 http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13_002.jpg.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13_002.jpg.html
Exposure
- LRGB 240:60:60:60
- L 5min subs @ bin1x1
- RGB 5min subs @ bin2x2
- 8 hours total exposure

Equipment Used
- RCOS Carbon Truss 12.5" RC
- SBIG STL-11000M w/ AO
- Paramount ME
- Astrodon Gen 2 Filters]]> Chris Johnson photo Fri, 28 May 2010 23:18:18 +0000 http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13_variable.mov.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13_variable.mov.html ]]> Chris Johnson photo Mon, 24 May 2010 23:27:12 +0000 http://gallery.cuttinedgeobservatory.com/v/globulars/M13/M13_core.jpg.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/M13_core.jpg.html
Exposure
- RGB 100:100:100
- RGB 5min subs @ bin1x1
- 5 hours total exposure

Equipment Used
- Takahashi TOA-150
- SBIG STL-11000M
- Paramount ME
- Astrodon Gen 2 Filters]]> Chris Johnson photo Tue, 25 May 2010 06:50:14 +0000 http://gallery.cuttinedgeobservatory.com/v/globulars/M13/M13_001.jpg.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/M13_001.jpg.html
Exposure
- RGB 100:100:100
- RGB 5min subs @ bin1x1
- 5 hours total exposure

Equipment Used
- Takahashi TOA-150
- SBIG STL-11000M
- Paramount ME
- Astrodon Gen 2 Filters]]> Chris Johnson photo Tue, 25 May 2010 06:50:36 +0000 http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13-Lumtest.jpg.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/m13-Lumtest.jpg.html
Test M13 TOA150
9x5min subs Lum STL11K 100% Center Crop]]> Chris Johnson photo Mon, 09 Mar 2009 00:22:07 +0000 http://gallery.cuttinedgeobservatory.com/v/globulars/M13/M13.jpg.html http://gallery.cuttinedgeobservatory.com/v/globulars/M13/M13.jpg.html ]]> Chris Johnson photo Tue, 25 May 2010 06:50:57 +0000