Sextans B
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.
Credit:KPNO/NOIRLab/NSF/AURA
Data 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’s NOIRLab), M. Zamani (NSF’s NOIRLab) & D. de Martin (NSF’s NOIRLab)
About the Image
| Id: | noirlab2115a |
| Type: | Observation |
| Release date: | April 28, 2021, 2 p.m. |
| Related releases: | noirlab2115 |
| Size: | 3482 x 2183 px |
About the Object
Wallpapers
Coordinates
| Position (RA): | 9 59 59.51 |
| Position (Dec): | 5° 19' 43.32" |
| Field of view: | 15.66 x 9.81 arcminutes |
| Orientation: | North is 0.0° right of vertical |
Colors & filters
| Band | Wave-length | Tele-scope |
|---|---|---|
| Optical U | 355 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
| Optical B | 438 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
| Optical OIII | 502 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
| Optical V | 538 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
| Optical R | 651 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
| Optical I | 820 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
| Optical SII | 673 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
| Optical H-alpha | 657 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |