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Uploaded 10-Jun-11
Taken 10-Jun-11
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Category:Scenic
Subcategory:Night Sky
Subcategory Detail:
Keywords:M9
Photo Info

Dimensions3600 x 2400
Original file size7.85 MB
Image typeJPEG
Color spaceUncalibrated
Date modified10-Jun-11 19:16
Messier 9  Globular Cluster in Opiuchus

Messier 9 Globular Cluster in Opiuchus

About this Object:
Messier 9 or M9 (also designated NGC 6333) is a globular cluster in the constellation of Ophiuchus. It was discovered by Charles Messier in 1764.

M9 is one of the nearer globular clusters to the center of the Milky Way Galaxy with a distance of around 5,500 light-years. Its distance from Earth is 25,800 light-years.

The total luminosity of this cluster is around 120,000 times that of the Sun, the absolute magnitude being -8.04. The brightest individual stars in M9 are of apparent magnitude 13.5, making them visible in moderately sized telescopes. There have been 13 variable stars found in M9.


About this Photo:
Date(s): June 8, 2011
Location: From my driveway in Georgetown, Texas
Telescope: Celestron C9.25 @ F6.5
Mount: CGEM
Guiding: Orion StarShoot AutoGuider / Taurus Tracker III
Camera: Canon 40D Modified
Filter: Astronomik CLS
Exposure: 11x180s @ ISO1600 (33 Minutes total)
Acquisition: ImagesPlus 3.75 Camera Control
Processing: ImagesPlus 3.75 – Darks,Flats,Bias
Post-processing: Adobe Photoshop CS3; Noel Carboni's Tools;
Temperature(s): 75º F