Hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Great Cluster in Hercules  ·  M 13  ·  NGC 6205  ·  NGC 6207
M13 - The Great Globular Cluster in Hercules, 


            Michael Rector
M13 - The Great Globular Cluster in Hercules
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Imaging Telescopes Or Lenses
Celestron XLT 150
Imaging Cameras
Canon 350d Canon
Celestron Advanced GT CG5
Orion StarShoot AutoGuider · Intervalometer
Photoshop · DSS

Acquisition details

June 8, 2014
24x120" (48')
13x300" (1h 5')
1h 53'
Avg. Moon age:
9.85 days
Avg. Moon phase:

Basic astrometry details

Astrometry.net job: 297431

RA center: 16h41m18s.7

DEC center: +36°3325

Pixel scale: 1.759 arcsec/pixel

Orientation: 49.495 degrees

Field radius: 0.991 degrees

Resolution: 620x408

Locations: Backyard, Plattsburgh, NY, United States


This image is 13 images at 5 minutes and 24 images at 2 minutes for a total of 2.8 hours, all images taken at ISO 800. 33 flat frames, and 44 dark frames. Stacked in deep sky stacker and post processing in photoshop. I did the two exposures as separate stacks and combined them in Photoshop. I was attempting to bring out some detail in the core with the shorter exposures while trying to get the dimmer outer stars of the cluster using the longer exposures. Didn’t quite work the way as planned, but I’m still pleased with the final results.


Sky plot

Sky plot


M13 - The Great Globular Cluster in Hercules, 


            Michael Rector