M13 - The Great Hercules Cluster

Globular Cluster in Hercules

Uploaded 6/11//05

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 There is over 100,000 stars in this cluster, the most famous globular cluster in the sky. Gold and blue supergiants dominate this image creating a spray of color and light. This object is rated at 5.8 magnitude, and 20 arcminutes in diameter. Most stars are 11.9 magnitude, with the faintest members over 15th. In the lower left corner is the faint spiral IC4617, a 15.5 magnitude object only 1.2 minutes in size.

Seeing was very bad this night, but transparency was good.

Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: RGB = 30:30:30 RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 6.5 arcsec (Maxim DL - 10min subframe), Transparency 8/10 Outside Temperature: 15 C CCD Temperature: -30 C Processing Tools: Maxim DL, Photoshop, PixInsight, RW Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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