M4 - Globular Cluster in Scorpius
with 8" f/3.9 Astrograph in Happy Jack
Uploaded 7/16/16

This stunning object can be found very close to the brilliant orange star Antares, near the heart of the scorpion. Notice that the core of this cluster contains a bar of stars oriented vertically, and hordes of very faint surrounding members!
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Instrument: 8" f/3.9 Orion Astrograph Newtonian with Baader MPCC Mount: Home made GEM with Byers Starmaster Drive Camera: Canon XTi DSLR modified by Hutech for full spectrum Guider: Meade DSI Pro w/60mm piggyback refractor Exposure: 15mins total Location: Happy Jack, Arizona, Elevation: 6800 ft. Sky: Seeing FWHM = 1 arcsec , Transparency 9/10 Outside Temperature: 55 F Image Processing Tools: Maxim DL6: Calibration, aligning, stacking PixInsight: Curves, Deconvolution Photoshop CS2: Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS