M 20 – NGC 6514


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M20 is a beautiful object in the constellation Sagittarius. It consists of three (out of four) Nebula types: Emission Nebula (the red glowing gas), Reflection Nebula (the blue glowing gas) and Dark Nebula (the dark lanes crossing in front of the previous ones). The emission nebula is fueled by several hot stars type O5 to O7. M20 is a young nebula, about 300,000 years old, and is part of the same complex of nebulosity of which the Lagoon Nebula, M8, is also part of.

Additional Information


Name(s): M 20. NGC 6514. Trifid Nebula

Type: Emission-Reflection-Dark Nebula

RA:  18h 02m 35s

Dec: -23ΒΊ 01’ 54.3”

Constellation: Sagittarius

Size (arcmin): 29×27

Magnitude: +6.3

Distance: 5,200 ly


Date: 2013-07-27

Location: iTelescope.net, SSO near Coonabarabran, NSW Australia

Size (arcmin): 40×27

Telescope: Planewave CDK 20” f/4.5

Camera: FLI PL 6303E (3072×2048)

Guiding: yes

Total exposure: 28 min (LRGB, 7x1min each)

Processing: CCDStack, Photoshop CC 2016 and PixInsight

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