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Contains:  NGC 6530, M 8, Lagoon nebula, Hourglass nebula, NGC 6523, NGC 6526, Trifid nebula, M 20, NGC 6514, The star 9Sgr, The star 7Sgr
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M8 Lagoon & M20 Trifid Nebula, 


M8 Lagoon & M20 Trifid Nebula

M8 Lagoon & M20 Trifid Nebula

Technical card

Imaging telescope or lens:Skywatcher ED80

Imaging camera:DIY Cam8

Mount:SkyWatcher AZ-EQ6

Guiding telescope or lens:Skywatcher Finder guider 9 x 50

Guiding camera:DIY Cam10

Focal reducer:Skywatcher .85x Focal Reducer & Corrector

Software:Diffraction Limited Maxim DLPixinsightDssAdobe PSFitstacker 12

Accessory:DIY Focus controllers

Resolution: 2628x1752

Dates:July 1, 2016July 2, 2016July 4, 2016July 5, 2016July 7, 2016July 8, 2016July 13, 2016

Frames: 73x600"

Integration: 12.2 hours

Avg. Moon age: 10.11 days

Avg. Moon phase: 15.87% job: 2518562

RA center: 270.876 degrees

DEC center: -23.724 degrees

Pixel scale: 3.092 arcsec/pixel

Orientation: 91.515 degrees

Field radius: 1.356 degrees

Locations: Remote observatory, Kiev, Ukraine

Data source: Own remote observatory

Remote source: Non-commercial independent facility


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 is estimated to be between 4,000-6,000 light-years from the Earth. In the sky of Earth, it spans 90' by 40', which translates to an actual dimension of 110 by 50 light years. Like many nebulas, it appears pink in time-exposure color photos but is gray to the eye peering through binoculars or a telescope, human vision having poor color sensitivity at low light levels. The nebula contains a number of Bok globules (dark, collapsing clouds of protostellar material), the most prominent of which have been catalogued by E. E. Barnard as B88, B89 and B296. It also includes a funnel-like or tornado-like structure caused by a hot O-type star that emanates ultraviolet light, heating and ionizing gases on the surface of the nebula. The Lagoon Nebula also contains at its centre a structure known as the Hourglass Nebula (so named by John Herschel), which should not be confused with the better known Engraved Hourglass Nebula in the constellation of Musca. In 2006 the first four Herbig–Haro objects were detected within the Hourglass, also including HH 870. This provides the first direct evidence of active star formation by accretion within it.

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. It is approximately 5000 ly away from Earth.
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Sky plot


M8 Lagoon & M20 Trifid Nebula,