Barnard 33 HorseHead Nebula (Luís Ramalho)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 50 zet Ori · Alnitak · B33 · Flame Nebula · Horsehead nebula · IC 434 · NGC 2023 · NGC 2024 · Orion B · Sh2-277 · The star Alnitak (ζOri)

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Barnard 33 HorseHead Nebula

Link: http://www.astrosurf.com/ramalho/nebulosas/b33/b33_ic434_20041209.htm

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Barnard 33 HorseHead Nebula

Link: http://www.astrosurf.com/ramalho/nebulosas/b33/b33_ic434_20041209.htm

About 1600 light-years away, apparently around the star Zeta Orionis (Alnitak), are a set of different types of nebulae. The Horsehead Dark Nebula (Barnard 33), in the constellation Orionte, is one of the most photographed objects in the sky. It was discovered on a photographic plate in the late 19th century. Its characteristic shape is the extension of an immense and dense cloud of interstellar dust that extends from the bottom of this image and which absorbs entirely the light of the stars located in the background. The B33 is difficult to observe visually, even with telescopes with generous aperture. In a few hundred years, the internal dynamics of the B33 will have changed its appearance. The red diffuse IC434 emission nebula is excited by the ultraviolet radiation from the star Sigma Orionis that is not visible in the image (above). This star causes the ionization of hydrogen, which, brilliantly, shows the dark shape of the horsehead nebula. Just below and to the left of this nebula, the reflection nebula NGC2023 can be seen, whose grains of dust disperse blue light more efficiently than red, thus giving it a bluish tint. Alnitak (Zeta Orionis), is much closer to us, just 135 light years away.

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Status	Advanced success
Started	...
Astrometry.net job	4170389
PixInsight job	A0HW3TYFL29VVDON2XI5SLTDDX3OQM1W
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h41m03s.94
RA (top/left)	05h39m31s.93
RA (top/right)	05h39m41s.90
RA (bottom/right)	05h42m35s.100
RA (bottom/left)	05h42m25s.89

Dec (center)	-02°17′49″.4
Dec (top/left)	-01°44′25″.3
Dec (top/right)	-02°52′49″.3
Dec (bottom/right)	-02°51′13″.1
Dec (bottom/left)	-01°42′49″.3

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Barnard 33 HorseHead Nebula

Barnard 33 HorseHead Nebula

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Barnard 33 HorseHead Nebula

Barnard 33 HorseHead Nebula

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