The Omega Nebula, M17

Noirlab_noao-m17e_1024

noirlab_noao-m17e January 29th, 2003

Credit: Hillary Mathis, N.A.Sharp, REU program/NOIRLab/NSF/AURA

The Omega Nebula, M17 or NGC6618, in the constellation Sagittarius. M17 is a bright emission nebula excited by young stars, but with lanes of opaque dust; it is also referred to as the Swan Nebula and the Horseshoe Nebula. This image is unusual in that it was created from five frames imaged with filters covering a narrow range of wavelengths centered on the emission lines of SII (6731 angstroms), HeI (6678), H-alpha (6563), OIII (5007), and H-beta (4861). The red, green and blue contributions to the final picture come from, respectively, the ratios H-alpha/SII, SII/HeI, and OIII/H-beta. Note especially the color gradients (that is, physical condition changes) across filaments and the criss-cross effect of projection. This image was created from ten observations made at the Burrell Schmidt telescope (owned by the Warner and Swasey Observatory of the Case Western Reserve University and situated on Kitt Peak in southwest Arizona), in May 1995 during observing experience for the Research Experiences for Undergraduates (REU) program operated at the Kitt Peak National Observatory and supported by the National Science Foundation. Image size 28.8 arc minutes. We also have optical pictures from the KPNO 0.9-meter, the KPNO Schmidt, and the KPNO Mayall 4-meter telescopes, and an interesting infrared image from the 2.1-meter telescope.

Provider: NOIRLab

Image Source: https://noirlab.edu/public/images/noao-m17e/

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

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
M17 NGC 6618
Noirlab_noao-m17e_128
 

Position Details

Position (ICRS)
RA = 18h 21m 1.2s
DEC = -16° 10’ 25.2”
Orientation
North is 1.9° CCW
Field of View
32.9 x 32.9 arcminutes
Constellation
Sagittarius

Color Mapping

  Telescope Spectral Band Wavelength
Blue Burrell Schmidt Telescope (None) Optical (H-beta) 486.0 nm
Blue Burrell Schmidt Telescope (None) Optical (Olll) 500.0 nm
Green Burrell Schmidt Telescope (None) Optical (Hel) 667.0 nm
Green Burrell Schmidt Telescope (None) Optical (Sll) 673.0 nm
Red Burrell Schmidt Telescope (None) Optical (Sll) 673.0 nm
Red Burrell Schmidt Telescope (None) Optical (Ha) 656.0 nm
Spectrum_base
Blue
Blue
Green
Green
Red
Red
Noirlab_noao-m17e_1280
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ID
noao-m17e
Subject Category
Subject Name
M17, NGC 6618
Credits
Hillary Mathis, N.A.Sharp, REU program/NOIRLab/NSF/AURA
Release Date
2003-01-29T12:27:41
Lightyears
Redshift
Reference Url
https://noirlab.edu/public/images/noao-m17e/
Type
Observation
Image Quality
Distance Notes
Facility
Burrell Schmidt Telescope, Burrell Schmidt Telescope, Burrell Schmidt Telescope, Burrell Schmidt Telescope, Burrell Schmidt Telescope, Burrell Schmidt Telescope
Instrument
None, None, None, None, None, None
Color Assignment
Blue, Blue, Green, Green, Red, Red
Band
Optical, Optical, Optical, Optical, Optical, Optical
Bandpass
H-beta, Olll, Hel, Sll, Sll, Ha
Central Wavelength
486, 500, 667, 673, 673, 656
Start Time
Integration Time
Dataset ID
None, None, None, None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
275.25498108, -16.1736713635
Reference Dimension
1700.0, 1700.0
Reference Pixel
850.0, 850.0
Scale
-0.000322112309955, 0.000322112309955
Rotation
1.9000000000000008
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
noao-m17e
Metadata Date
2021-04-22T17:20:01.156496
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.