M17 Omega Nebula

Emission nebula and star cluster in Sagittarius: M17 (NGC 6618). Distance is approximately 6,000 light-years. Also known as the Swan Nebula, the Horseshoe Nebula, and the Lobster Nebula.

Shot 18-19 July 2009; Mt. Tamalpais State Park, California; ISO 800, Exp 1 hr, 32.5 min (37x2.5m), f/5.2, Canon EOS 5D & Televue NP127is. Calibration, alignment, & stacking with Images Plus 3.0; other post-processing with Photoshop CS4.

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