Lagoon and Trifid Widefield (Sigga)

Lagoon and Trifid Widefield

M8

The Lagoon Nebula (catalogued as Messier 8 or M8, NGC 6523, Sharpless 25, RCW 146, and Gum 72) is a giant interstellar cloud in the constellation Sagittarius. It is classified as an emission nebula and as an H II region.

The Lagoon Nebula was discovered by Giovanni Hodierna before 1654 and is one of only two star-forming nebulae faintly visible to the eye from mid-northern latitudes. Seen with binoculars, it appears as a distinct oval cloudlike patch with a definite core. In the foreground is the open cluster NGC 6530.

M20

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.

--Wikipedia

Final
Original
B

B

Description: Older too green version. Thanks for suggestions to fix especially to my friend Harald for tip on easy solution.

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Status	Advanced success
Started	...
Astrometry.net job	1631389
PixInsight job	M369WCQGWR08JTK7R1EDK53AY2Q5COM0
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h05m53s.9
RA (top/left)	17h57m57s.3
RA (top/right)	17h57m05s.4
RA (bottom/right)	18h14m01s.0
RA (bottom/left)	18h14m32s.8

Dec (center)	-23°49′48″
Dec (top/left)	-22°24′15″
Dec (top/right)	-24°59′29″
Dec (bottom/right)	-25°13′58″
Dec (bottom/left)	-22°38′07″

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