The Horsehead Nebula/IC434

Noirlab_noao0126a_1024

noirlab_noao0126a November 23rd, 2015

Credit: T.A.Rector (NOIRLab/NSF/AURA) and Hubble Heritage Team (STScI/AURA/NASA)

This exceptional image of the Horsehead nebula was taken at the National Science Foundation's 0.9-meter telescope on Kitt Peak with the NOAO Mosaic CCD camera. Located in the constellation of Orion, the Hunter, the Horsehead is part of a dense cloud of gas in front of an active star-forming nebula known as IC434. The nebulosity of the Horsehead is believed to be excited by the bright star Sigma Orionis, which is located above the top of the image. Just off the left side of the image is the bright star Zeta Orionis, which is the easternmost of the three stars that form Orion's belt. Zeta Orionis is a foreground star, and is not related to the nebula. The streaks in the nebulosity that extend above the Horsehead are likely due to magnetic fields within the nebula. Close study reveals that many more stars are visible in the top half of the image. Stars in the lower half of the image are obscured by a dark cloud of hydrogen gas. The edge of this large cloud is the horizontal strip of glowing gas that bisects the image. The Horsehead is located about 1,600 light-years away from Earth. The area shown in this image is quite large on the sky, covering about five times the area of the full Moon. This false-color image was created by combining emission-line images taken in hydrogen-alpha (red), oxygen [OIII] (green) and sulfur [SII] (blue).

Provider: NOIRLab

Image Source: https://noirlab.edu/public/images/noao0126a/

Curator: NSF's NOIRLab, Tucson, AZ, USA

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
Horsehead Nebula IC 434 Orionis
Noirlab_noao0126a_128
 

Position Details

Position (ICRS)
RA = 5h 40m 55.0s
DEC = -2° 43’ 6.0”
Orientation
North is 89.7° CCW
Field of View
56.6 x 57.5 arcminutes
Constellation
Orion

Color Mapping

  Telescope Spectral Band Wavelength
Blue WIYN 0.9-meter Telescope (Mosaic 1) Optical (Sll) 672.0 nm
Green WIYN 0.9-meter Telescope (Mosaic 1) Optical (Olll) 499.0 nm
Red WIYN 0.9-meter Telescope (Mosaic 1) Optical (Ha) 656.0 nm
Spectrum_base
Blue
Green
Red
Noirlab_noao0126a_1280
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ID
noao0126a
Subject Category
Subject Name
Horsehead Nebula, IC 434, Orionis
Credits
T.A.Rector (NOIRLab/NSF/AURA) and Hubble Heritage Team (STScI/AURA/NASA)
Release Date
2015-11-23T00:00:00
Lightyears
Redshift
Reference Url
https://noirlab.edu/public/images/noao0126a/
Type
Observation
Image Quality
Distance Notes
Facility
WIYN 0.9-meter Telescope, WIYN 0.9-meter Telescope, WIYN 0.9-meter Telescope
Instrument
Mosaic 1, Mosaic 1, Mosaic 1
Color Assignment
Blue, Green, Red
Band
Optical, Optical, Optical
Bandpass
Sll, Olll, Ha
Central Wavelength
672, 499, 656
Start Time
Integration Time
Dataset ID
None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
85.22908518, -2.718343123
Reference Dimension
3996.0, 4063.0
Reference Pixel
3000.656891, 2071.090363
Scale
-0.000236, 0.000236
Rotation
89.65523161
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
NSF's NOIRLab
URL
https://noirlab.edu
Name
Email
Telephone
Address
950 North Cherry Ave.
City
Tucson
State/Province
AZ
Postal Code
85719
Country
USA
Rights
Creative Commons Attribution 4.0 International License
Publisher
NSF's NOIRLab
Publisher ID
noirlab
Resource ID
noao0126a
Metadata Date
2020-10-01T12:47:22.414462
Metadata Version
1.1
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Detailed color mapping information coming soon...

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There is no distance meta data in this image.