M20 (NGC, Trifid) and M21 (NGC 6531)
noirlab_noao-m21a20 June 30th, 2020
Credit: REU program/NOIRLab/NSF/AURA
TheTrifid Nebula, M20 (upper left, NE) and the open star cluster M21 (lower right, SW), are close enough together on the sky that they both appear in this wide-field, 51 arc minute square picture taken with the Burrell Schmidt telescope of Case Western Reserve University's Warner and Swasey Observatory located on Kitt Peak, near Tucson, Arizona. The single set of BVR images was taken in June 1996, during the Research Experiences for Undergraduates (REU) program operated at the Kitt Peak National Observatory and supported by the National Science Foundation. Higher resolution images are separately available for M20 and M21.
Provider: NOIRLab
Image Source: https://noirlab.edu/public/images/noao-m21a20/
Curator: NSF's NOIRLab, Tucson, AZ, USA
Image Use Policy: Creative Commons Attribution 4.0 International License
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Source TIFF (6.46 MB)
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Image Details
Position Details
Color Mapping
- ID
- noao-m21a20
- Subject Category
- Subject Name
- M20, M21, NGC 6514, NGC 6531, Trifid Nebula
- Credits
- REU program/NOIRLab/NSF/AURA
- Release Date
- 2020-06-30T21:34:06
- Lightyears
- Redshift
- Reference Url
- https://noirlab.edu/public/images/noao-m21a20/
- Type
- Observation
- Image Quality
- Distance Notes
- Facility
- Burrell Schmidt Telescope, Burrell Schmidt Telescope, Burrell Schmidt Telescope
- Instrument
- None, None, None
- Color Assignment
- Red, Green, Blue
- Band
- Optical, Optical, Optical
- Bandpass
- R, V, B
- Central Wavelength
- Start Time
- Integration Time
- Dataset ID
- None, None, None
- Notes
- Coordinate Frame
- ICRS
- Equinox
- J2000
- Reference Value
- 270.7676347, -22.7383267
- Reference Dimension
- 1500.0, 1500.0
- Reference Pixel
- 660.3756447, 661.2807617
- Scale
- -0.000564, 0.000564
- Rotation
- -177.4393408
- Coordinate System Projection:
- TAN
- Quality
- Full
- FITS Header
- Notes
- Creator (Curator)
- NSF's NOIRLab
- URL
- https://noirlab.edu
- Name
- 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-m21a20
- Resource URL
- http://noirlab.edu/public/media/archives/images/original/noao-m21a20.tif
- Related Resources
- Metadata Date
- 2024-10-02T11:52:34.863004
- Metadata Version
- 1.1
Detailed color mapping information coming soon...
