Barnard 33 Nebula (HorseHead Nebula) and NGC 2023 reflection nebula (Luís Ramalho)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: B33 · Flame Nebula · Horsehead nebula · IC 434 · NGC 2023 · Orion B · Sh2-277

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Barnard 33 Nebula (HorseHead Nebula) and NGC 2023 reflection nebula

Link: http://www.astrosurf.com/ramalho/nebulosas/b33/b33_20080312.htm

Powered byPixInsight

Barnard 33 Nebula (HorseHead Nebula) and NGC 2023 reflection nebula

Link: http://www.astrosurf.com/ramalho/nebulosas/b33/b33_20080312.htm

About 1600 light-years away, apparently around the star Zeta Orionis (Alnitak), are a set of different types of nebulae. The Dark Horsehead Nebula (Barnard 33), in the Orion constellation, 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 diffuse IC434 emission nebula, sensibly oriented in the North-South direction 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 horse's head. Just below and to the left of the horse's head, the reflection nebula NGC2023 can be seen in this image, whose grains of dust disperse blue light more efficiently than red, giving it a bluish color image. Alnitak (Zeta Orionis), is much closer to us, just 135 light years away.

Nebulas

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Status	Advanced success
Started	...
Astrometry.net job	4119088
PixInsight job	G30O75WEBXIHYECETMXDYJB3IAX4QXCL
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h41m06s.62
RA (top/left)	05h39m47s.36
RA (top/right)	05h40m23s.20
RA (bottom/right)	05h42m25s.99
RA (bottom/left)	05h41m49s.97

Dec (center)	-02°27′33″.4
Dec (top/left)	-02°07′22″.2
Dec (top/right)	-02°53′40″.2
Dec (bottom/right)	-02°47′44″.5
Dec (bottom/left)	-02°01′26″.2

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Barnard 33 Nebula (HorseHead Nebula) and NGC 2023 reflection nebula

Barnard 33 Nebula (HorseHead Nebula) and NGC 2023 reflection nebula

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Barnard 33 Nebula (HorseHead Nebula) and NGC 2023 reflection nebula

Barnard 33 Nebula (HorseHead Nebula) and NGC 2023 reflection nebula

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