Medusa nebula, Abell 21
noirlab_noaoann09008a April 21st, 2009
Credit: T. A. Rector/University of Alaska Anchorage and H. Schweiker/NOIRLab/NSF/AURA and NOIRLab/NSF/AURA
The Medusa nebula, known scientifically as Abell 21, is an old planetary nebula some 1,500 light-years away in the constellation Gemini. It is estimated to be over 4 light-years across. This image was taken on Oct 24th, 2008 at the Mayall telescope with the mosaic camera, with [OIII] (assigned a blue color) and H-alpha (orange) filters This image was released during the 100 Hours of Astronomy webcast, "Around the World in 80 Telescopes" held from April 3-4, 2009, during the International Year of Astronomy 2009. View the recorded event from KPNO. See also this image of NGC 6520 from CTIO, which was also released during the webcast.
Provider: NOIRLab
Image Source: https://noirlab.edu/public/images/noaoann09008a/
Curator: NSF's NOIRLab, Tucson, AZ, USA
Image Use Policy: Creative Commons Attribution 4.0 International License
View Options
Download Options
Image Details
Position Details
Color Mapping
- ID
- noaoann09008a
- Subject Category
- Subject Name
- Medusa Nebula, Sh 2-274
- Credits
- T. A. Rector/University of Alaska Anchorage and H. Schweiker/NOIRLab/NSF/AURA and NOIRLab/NSF/AURA
- Release Date
- 2009-04-21T00:00:00
- Lightyears
- Redshift
- Reference Url
- https://noirlab.edu/public/images/noaoann09008a/
- Type
- Observation
- Image Quality
- Distance Notes
- Facility
- Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope
- Instrument
- Mosaic I, Mosaic I
- Color Assignment
- Orange, Cyan
- Band
- Optical, Optical
- Bandpass
- Ha, Olll
- Central Wavelength
- 656, 499
- Start Time
- Integration Time
- Dataset ID
- None, None
- Notes
- Coordinate Frame
- ICRS
- Equinox
- J2000
- Reference Value
- 112.264402797, 13.2544918006
- Reference Dimension
- 8333.0, 8304.0
- Reference Pixel
- 4166.5, 4152.0
- Scale
- -7.20585526014e-05, 7.20585526014e-05
- Rotation
- 90.120000000000047
- 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
- noaoann09008a
- Resource URL
- http://noirlab.edu/public/media/archives/images/original/noaoann09008a.tif
- Related Resources
- Metadata Date
- 2024-10-02T11:52:23.070986
- Metadata Version
- 1.1
Detailed color mapping information coming soon...
