M 20 - Trifid Nebula
M 20 - Trifid Nebula |
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Object data of Messier20 |
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| Object type: | Emission and reflection nebula | |
| Size: | 28' | |
| Magnitude: | 6.3 mag | |
| Constellation: | Sgr | |
| Distance: | 5,200 Ly | |
| Notes: |
The Trifid Nebula (catalogued as Messier 20) is a prominent H II region
located in constellation Sagittarius. Its name means 'divided into three
lobes'. The object is an unusual combination of an open star cluster, an
emission nebula (the lower, red portion), a reflection nebula (the upper,
blue portion) and a dark nebula (the apparent 'gaps' within the emission
nebula). Besides M20, the above image shows also the bright open star cluster M21, the faint emission nebula Sh 2-26 and the small open star cluster Bochum 14. |
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Exposure data |
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| Date: | 2017-07-19 + 2017-07-20 + 2017-07-22 | |
| Location: | ATHOS Centro Astronomico / La Palma (900m) | |
| Telescope: | Astro-Physics 175mm f/8 Starfire EDF with field flattener (f=1452mm) | |
| Camera: | Moravian G4-16000 with Baader filters | |
| Binning: | L 1x1 / RGB 1x1 | |
| Mount: | 10micron GM3000 HPS | |
| Exposure time: | L 18x6min / R 7x6min / G 7x6min / B 7x6min | |
| Exposure time total: | 3h 54min | |
| Notes: | Image acquisition by CEDIC team (Bernhard Hubl, Christoph Kaltseis, Markus Blauensteiner, Michael Hanl) Image processing by Bernhard Hubl |
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