Trifid Nebulae: Catalogs: M20, NGC 6514. Constellation: Sagittarius. Type: reflection and dark nebula. Distance: 5500 light years. SIMBAD->
Lagoon Nebulae. Catalogs: M8, NGC 6523. Constelaton: Saggitarius. Tipo: Emmission nebulae. Distance: 5000 light years. SIMBAD->

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July 8th, 2019


La Patrie, QC., Canada


ISO: 1600
Exposure: 2h  20min
( 140 shots x  1 min)
Focal length:
480 mm (80 mm x f/6.0)
darks,  bias,   flats



Canon EOS REBEL T5i (modificada)
Explore Scientific 80 mm f/6 triplet carbon fiber
* No field flattener. The distortion is clear in the corners

No guiding



Celestron AVX

Processing Software


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.[3] 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.[4]

The Trifid Nebula is a star-forming region in the Scutum spiral arm of the Milky Way.[5] 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.[6] This star is surrounded by a cluster of approximately 3100 young stars.[7]


The Lagoon Nebula is estimated to be between 4,000-6,000 light-years away 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.[2]