M20
The
Trifid Nebula
M20
- The Trifid Nebula in Sagittarius
by
Bob and Janice Fera
Parallax
Instruments 12.5" f/9 Ritchey Chretien
Yankee
Robotics Trifid II 6303 CCD Camera
Astrodon
HaLRGB filters
(L+Ha)RGB
composite (L:60 Ha:90 RGB:60,60,60)
LRGB
Sub-exposures: 10 min, Ha Sub-exposures: 20 min, RGB binned 2x2
Processed
in CCDops, MaxIm/DL (with RC-Astro plug-in), Gralak Sigma, AIP4WIN,
Picture Window and Adobe Photoshop
Taken
July 5-7, 2005 from Eagle Ridge Observatory, Foresthill, CA
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