Barnard 33, the Horsehead Nebula
Barnard 33 in Orion
The Horsehead Nebula
||05 : 40.9 (h:m)
||-02 : 28 (deg:m)
||6x4 (arc min)
E. Pickering detected IC 434 photographically in 1889, the Horsehead can
be detected on a photo made on January 25, 1900 by Isaac Roberts
(Roberts 1902). E.E. Barnard recognized the
object in the 1910s.
The first published description of the Horsehead Nebula was given in
Barnard (1913), and it was first cataloged by
The remarkable Horsehead is a dark globule of dust and non-luminous gas,
obscuring the light coming from behind, especially the moderately bright
nebula IC 434. It is the most remarkable feature of an
interesting region of diffuse nebulae, which belongs
to a huge cloud of gas and dust
situated 1,600 light years away in the direction of constellation Orion.
The bright reflection nebula in the lower left is NGC 2023.
The image in this page was obtained by David Malin with the
Anglo-Australian Telescope. This image is copyrighted and may be used for
private purpose only. For any other kind of use, including internet mirroring
and storing on CD-ROM, please contact the Photo Permissions Department
(photo at aaoepp.aao.gov.au) of the
Australian Astronomical Observatory.
More information on this image (David Malin)
Hubble Space Telescope Observes the Horsehead Nebula (April 2001)
photo page and
SIMBAD Data of the Horsehead Nebula B33
Publications on the Horsehead Nebula B33 (NASA ADS)
Observing Reports for Barnard 33 (IAAC Netastrocatalog)
- Edward Emerson Barnard, 1913.
Dark Regions in the Sky Suggesting an Obscuration of Light.
Astrophysical Journal, Vol. 38, pp. 496-501
Here also plates XIX and XXb.
- Edward Emerson Barnard, 1919.
On the Dark Markings of the Sky - with a Catalogue of 181 Such Objects.
Astrophysical Journal, Vol. 49, pp. 1-23
(First edition of Barnard's catalogue
of dark nebulae)
- Isaac Roberts, 1902.
William Herschel's observed Nebulous Regions, 52 in number, compared
with Isaac Roberts' photographs of the same Regions, taken
simultaneously with the 20-in. reflector and the 5-in. Cooke lens.
Monthly Notices of the Royal Astronomical Society, Vol. 63, pp. 26-34
Has the "discovery photo" of the horsehead. Roberts mentions this dark
nebula in his description as "an embayment free from nebulosity
dividing it [IC 434] in halves."
Last Modification: June 4, 1998