Site and content copyright Robert Allevo 2002-2010
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M20 |
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Trifid Nebula in Sagittarius |
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Technical Details |
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| Optics | 12 1/2" RCOS operating at f/6.5 (2063mm) |
| Mount | Paramount ME |
| Camera | SBIG ST-10XME, CFW8-a |
| Filters | Tru Balance LRGB. |
| Date | Sept. 4 &11, 2005 |
| Exposure | (R+B)RGB = 75:75:20:25:35 minutes (5 min. integrations) |
| Processing | MaximDl with RC Console & DDP stretched, Photoshop CS |
| Guiding | ST-402 mounted on Takahashi Sky90 |
| Binning | Lum - 1x1, RGB - 2x2 |
| Location | SkyFoto observatory in East Hartland, Ct. |
| Notes | M20 is very roughly 3500 light years distant. The sort of three lobed appearance suggested the name "Trifid". The red portion is an emission nebula while the blue portion is a reflective nebula. |
Previous Attempt
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12" f/10 ST8XE / CFW8 Data taken on Sept. 16, 2003 |
