M20, a nebula in Sagittarius, is known as the Trifid Nebula. Its nebulosity is a combination of both emission and reflection nebulae and also includes a star cluster.
M21, an additional star cluster, appears on the far right.
Taken in suburbia, my light pollution filter seems to enable good contrast and detail for black & white imaging; but in colour (see below) the image appears with a strong blue hue which I have found difficult to reduce without affecting the object itself.
Details:
Exposure: 10 x 4 min ISO 800
Gear: Skywatcher ED120 refractor, 840mm f/l, f/7, Canon EOS 60D. LP filter, no flattener
Location: Leumeah, NSW
Date: 2017-07-18
Object 1:
Messier 20, NGC 6514
Visual magnitude: +6.3
Apparent diameter: 29 x 27 arc-min
Actual diameter: 44 light years
Distance: 5,200 light years
Object 2:
Messier 21, NGC 6531
Visual magnitude: +5.9
Apparent diameter: 14 arc-min
Actual diameter: 16 light years
Distance: 1,200 light years
The processed colour image is not very satisfying:
Images © R.Powell
Cosmic Focus 
Wow, the Trifid Nebula – Mgławica Trójlistna Koniczyna – the superb capture!!!
Roger, the stellar jet is visible (SW from the nebula’s central star)?
The radiation from that star makes the jet glow?
🙂
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Yes, Kazia, to the extent that this is an emission nebula, the glow is due to intense radiation from the newborn stars within. I doubt if there are any jets visible on this image but I could be wrong.
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