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M 20, The Trifid Nebula, in Sagittarius
M20, the Trifid Nebula, has both emission (red) and reflection (blue) areas. One of many nebulas in Sagittarius, it can be seen with M8 in a wide angle image here and here.
| Date | 2005-06-10 |
| Scope | RCOS 12.5 inch Ritchey-Chretien telescope at f/6 on an A-P 1200 GTO mount. Camera: SBIG ST-10XME with CFW8a filter wheel. Controlled with MaxIm 4.10. |
| Exposures | 25 minutes ( 5 x 5 min) each R, G, and B exposures with Astrodon filters. |
| Processing | Stacked and color combined in MaxIm, stretched in Photoshop CS2. |