M27, The Dumbbell Nebula in Vulpecula


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Description: Called the Dumbbell nebula because of its visual appearance, this planetary nebula is the brightest in the sky.  The central star is a bright blue dwarf.  North is up in this image.  The internal structure, including the apparent jets coming toward us at 10 PM and away from us at 4 PM, and the fainter outer shell, are visible in this image.
Exposure Data: 6/14-17/2007.  LHaRGB: 20x10m, 14x20m, 5x10m, 8x10m, 8x10m, Ha binned 2x2. -15C, 0.55 arc-sec./pixel.  11.5 hours total exposure.
Processing: Acquired via CCDAutoPilot and CCDSoft, calibrated and combined in CCDStack, final processing in PS CS3.
Optical System: 14.5 Ritchey-Chretien @ F/9 w/FFC, Apogee Alta U16M/FLI CFW-7 CCD camera, AstroDon filters, Paramount ME, dithered 3 pixels, off-axis guided with SBIG ST-402ME.
Comments: Seeing was mediocre at 2.7 arc-sec. for the combined luminance data.