Messier 20 in Sagittarius
Exposure time total:
Emission and reflection nebula
2017-07-23 + 24
Astro-Physics 175mm f/8 Starfire EDF with field flattener (f=1452mm)
10micron GM3000 HPS
L 10x6 min, RGB 4x6 min each
Moravian G4-16000 with Baader filters
Image acquisition by CEDIC team
(Bernhard Hubl, Christoph Kaltseis, Markus Blauensteiner, Michael Hanl)
Image processing by Bernhard Hubl
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.
5 200 Ly