NGC6229 - Hercules Third Brightest Globular

Globular Cluster in Hercules

Uploaded 7/8/05

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 There are three relatively bright globular star clusters in this constellation, M13, M92 and this one. Rated at a much dimmer 9.4th magnitude and a diminutive 4.5 arcminutes in size, it is certainly outclassed by the brighter members of the trio, yet is rarely shot by amateurs. It is difficult to resolve, the stars are dim - typically 15.5 magnitude but most being 18th and dimmer. Close examination of the largest image will show a sprinkling of blue dim stars on the periphery of this cluster, the orange supergiants dominating the scene because of their much brighter magnitude. Little resolution in the core is seen, even with the 12.5 inch.
Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: LRGB = 60:20:20:20 RGB Combine Ratio: 1: 1.05: 1.11 (G2V) Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 5 arcsec (Maxim DL - 10min subframe), Transparency 8/10 Outside Temperature: 15 C CCD Temperature: -30 C Processing Tools: Maxim DL, Photoshop, PixInsight, CCDOps Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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