Messier 20 - The Trifid Nebula
Nebulae
Click to zoom
Description
H-alpha and RGB composition Chroma RGB filters and Astrodon 5nm Halpha About 9 hours total integration in 4 nights Ritchey Chretien 12" w/ APM Riccardi .75x reducer KAI4022 CCD sensor @-15°C 10Micron 2000HPSII