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Contains:  Trifid nebula, M 20, NGC 6514
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Trifid Nebula - M20, 


            Thomas Richter
Trifid Nebula - M20

Trifid Nebula - M20

Technical card

Resolution: 5295x3495

Dates:June 28, 2019June 29, 2019

Baader B 1.25'' CCD Filter: 10x240" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 10x240" (gain: 53.00) -20C bin 1x1
Baader L 1.25'' Filter: 28x240" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 10x240" (gain: 53.00) -20C bin 1x1

Integration: 3.9 hours

Darks: ~37

Flats: ~27

Bias: ~100

Avg. Moon age: 25.53 days

Avg. Moon phase: 17.26% job: 2773357

RA center: 18h 2' 29"

DEC center: -22° 59' 27"

Pixel scale: 0.495 arcsec/pixel

Orientation: 268.550 degrees

Field radius: 0.436

Locations: Linden, Linden, Bayern, Germany

Data source: Traveller


Object description (

The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region located in Sagittarius. It was discovered by Charles Messier on June 5, 1764. Its name means 'divided into three lobes'. The object is an unusual combination of an open cluster of stars; 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 that cause the trifurcated appearance; these are also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers.

The Trifid Nebula is a star-forming region in the Scutum spiral arm of the Milky Way. The most massive star that has formed in this region is HD 164492A, an O7.5III star with a mass more than 20 times the mass of the Sun. This star is surrounded by a cluster of approximately 3100 young stars.



Thomas Richter
License: None (All rights reserved)

Sky plot

Sky plot


Trifid Nebula - M20, 


            Thomas Richter