Sextans B
noirlab_noirlab2115a April 28th, 2021
Credit: KPNO/NOIRLab/NSF/AURAData obtained and processed by: P. Massey (Lowell Obs.), G. Jacoby, K. Olsen, & C. Smith (AURA/NSF) Image processing: T.A. Rector (University of Alaska Anchorage/NSF NOIRLab), M. Zamani (NSF NOIRLab) & D. de Martin (NSF NOIRLab)
Sextans B is an irregular dwarf galaxy, meaning that it is irregularly shaped and smaller than our galaxy, the Milky Way. It lies around 4.5 million light-years from Earth and is located in the constellation Sextans in the southern sky. Captured with the Nicholas U. Mayall 4-meter Telescope, this image of Sextans B features red-colored star-forming regions near the galaxy’s center. Surrounding the galaxy are several bright stars that are located much closer to us in our galaxy, identified by the crisscross patterns created by light interacting with the structure of the telescope, as well as numerous fuzzy-looking background galaxies that appear small because they are much farther away than Sextans B.
Provider: NOIRLab
Image Source: https://noirlab.edu/public/images/noirlab2115a/
Curator: NSF's NOIRLab, Tucson, AZ, USA
Image Use Policy: Creative Commons Attribution 4.0 International License
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Source TIFF (43.5 MB)
Image Details
Position Details
Color Mapping
| Telescope | Spectral Band | Wavelength | |
|---|---|---|---|
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KPNO-4m (Mosaic I) | Optical (SII) | 673.0 nm |
|
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KPNO-4m (Mosaic I) | Optical (H-alpha) | 657.0 nm |
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KPNO-4m (Mosaic I) | Optical (I) | 820.0 nm |
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KPNO-4m (Mosaic I) | Optical (R) | 651.0 nm |
|
KPNO-4m (Mosaic I) | Optical (V) | 538.0 nm |
|
KPNO-4m (Mosaic I) | Optical (OIII) | 502.0 nm |
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KPNO-4m (Mosaic I) | Optical (B) | 438.0 nm |
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KPNO-4m (Mosaic I) | Optical (U) | 355.0 nm |
- ID
- noirlab2115a
- Subject Category
- Subject Name
- Sextans B
- Credits
- KPNO/NOIRLab/NSF/AURAData obtained and processed by: P. Massey (Lowell Obs.), G. Jacoby, K. Olsen, & C. Smith (AURA/NSF) Image processing: T.A. Rector (University of Alaska Anchorage/NSF NOIRLab), M. Zamani (NSF NOIRLab) & D. de Martin (NSF NOIRLab)
- Release Date
- 2021-04-28T14:00:00
- Lightyears
- Redshift
- Reference Url
- https://noirlab.edu/public/images/noirlab2115a/
- Type
- Observation
- Image Quality
- Distance Notes
- Facility
- Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope
- Instrument
- Mosaic I, Mosaic I, Mosaic I, Mosaic I, Mosaic I, Mosaic I, Mosaic I, Mosaic I
- Color Assignment
- Red, Red, Orange, Yellow, Green, Cyan, Blue, Purple
- Band
- Optical, Optical, Optical, Optical, Optical, Optical, Optical, Optical
- Bandpass
- SII, H-alpha, I, R, V, OIII, B, U
- Central Wavelength
- 673, 657, 820, 651, 538, 502, 438, 355
- Start Time
- Integration Time
- Dataset ID
- None, None, None, None, None, None, None, None
- Notes
- Coordinate Frame
- ICRS
- Equinox
- J2000
- Reference Value
- 149.99795195, 5.32869875794
- Reference Dimension
- 3482.0, 2183.0
- Reference Pixel
- 1741.0, 1091.5
- Scale
- -7.49340259298e-05, 7.49340259298e-05
- Rotation
- -0.02
- 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
- noirlab2115a
- Resource URL
- http://noirlab.edu/public/media/archives/images/original/noirlab2115a.tif
- Related Resources
- Metadata Date
- 2020-01-24T08:01:45+01:00
- Metadata Version
- 1.1
Detailed color mapping information coming soon...
