- The Great Hercules Cluster
Cluster in Hercules
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
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.