M103 - Rich open cluster in Cassiopiea
with 10" f/3.9 Astrograph
Uploaded 12/22/17

Could this be the most photogenic open cluster in this constellation? Possibly. A stunning trio of bright stars overlays a sparkle of dozens of fainter members in this celestial gem. At 7.4th magnitude and 6 arc minutes in size it the perfect dimensions for my 9mm Nagler in the 10 inch for a superlative view.
Select an image size for a larger view: 1400 x 1200
Instrument: 10" f/3.9 Orion Astrograph Newtonian with Baader MPCC Mount: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling Guider: Meade DSI Pro w/80mm piggyback refractor Exposure: 15m RGB AstroDon RGB Combine Ratio: 1: 1.05: 1.2 Location: Payson, Arizona, Elevation: 5150 ft. Sky: Seeing FWHM = 4 arcsec , Transparency 9/10 Outside Temperature: 35 F CCD Temperature: -20 C Image Processing Tools: Maxim DL6: Calibration, deblooming (Starizona Debloomer), 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