M20, The Trifid Nebula, in Sagittarius

 

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Exposure Data: 6/1/2008.  RGB: 12x20m, 12x20m, 12x20m, 1x1. -15C, 0.55 arc-sec./pixel.
 
Processing: Acquired via CCDAutoPilot and CCDSoft, calibrated, color combine in CCDStack, final processing in PS CS3.
 
Optical System: 14.5 Ritchey-Chretien @ F/9 w/FFC, Apogee Alta U16M/FW50-7S CCD camera, AstroDon filters, Paramount ME, dithered 3 pixels, off-axis guided with SBIG ST-402ME.
 
Comments: Target average elevation of 30 over the city of Tucson made this a bit challenging.