Trifid Nebula, M20 in CFHT Palette
Copyright 2011
Larry Phillips
M20 (NGC 6514), the Trifid Nebula, a reflection/emission nebula in the constellation Sagittarius

This is a narrowband image using the HOS CFHT palette

Distance: 7600 light years
Camera: SBIG ST-2000XM
Telescope: Astrophysics Starfire 140 EDT F7.5
Mount: Astro-Physics Mach1 GTO with Advanced Telescope Systems portable pier
Images: 46 subexposures of 20 minutes each with 15 Ha, 16 OIII, and 15 SII for a total of 15 hours and
                  20 minutes
Date: April 2010
Software: Camera, mount, and guider control - CCD Commander & MaximDL, calibration and stacking - CCDStack, further processing in Photoshop CS4.