M8 & M20 (John O'Neal, NC Stargazer)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Hourglass nebula · Lagoon nebula · M 20 · M 21 · M 8 · NGC 6514 · NGC 6523 · NGC 6526 · NGC 6530 · NGC 6531 · The star 4Sgr · The star 7Sgr · The star 9Sgr · Trifid nebula

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M8 & M20

Acquisition type: Lucky imaging

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M8 & M20

Acquisition type: Lucky imaging

The Trifid Nebula or Messier 20 is an H II region located in Sagittarius. It was discovered by Charles Messieron 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).

Messier 8, also known as the Lagoon Nebula, is a large, bright emission nebula located in the constellation Sagittarius.

Classified as an H II region, the star-forming nebula has an apparent magitude of 6.0 and lies at a distance of 4,100 light years from Earth. It has the designation NGC 6523 in the New General Catalogue.

The Lagoon Nebula is currently undergoing a period of active star formation and has already formed a sizable cluster of stars. NGC 6530, the extremely young open cluster formed from the material of M8, has a visual magnitude of 4.6 and covers an area of 14 arc minutes in the sky. It is centred in the eastern part of the nebula.

64 x 30 second subs @ 1600 ISO shot through an Orion EON ED80 on July 30th, 2019 at my Shiloh Observatory.

Calibration

Center (RA, Dec): (270.834, -23.590)

Center (RA, hms): 18h 03m 20.100s

Center (Dec, dms): -23° 35' 25.410"

Size: 2.62 x 1.69 deg

Radius: 1.558 deg

Pixel scale: 3.55 arcsec/pixel

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	2830596
PixInsight job	n/a
PixInsight queue size	n/a
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M8 & M20

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