32 31 30 29 28 27 26 25 24




IC434 and B33: Horsehead Nebula in Orion

RA = 5 hrs 41 min; Dec = -2 deg 27 min

Date & Site:

Imaged on1/12/2013; Runningman Observatory, Carlsbad

Conditions: calm; 41 degrees; very good seeing


Telescope: TEC 140 Refractor (F7 980 mm fl)
Mount: Losmandy G-11 with Gemini
Camera: ST-10XME; CFW10; prime focus guided


Exposures: 24 10 min exposures in hydrogen alpha for a total of 4 hours

FOV = 26.6 x 31.2 arc minutes

The region surrounding the Horsehead Nebula is a stellar nursery. A complex housing forming stars, known as a stellar nursery, can contain over 100 known organic and inorganic gases as well of dust consisting of large and complex organic molecules. The darkness of the massive nebula (cataloged as Barnard 33) is not explained by this dust and gas, but by the molecular cloud complex blocking the light of stars behind it.

The Horsehead nebula is located just to the south of the star Alnitak, which is farthest east on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex.

1,500 ly distant

Back to Images