Sextans Dwarf Spheroidal
| Sextans Dwarf Spheroidal | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Sextans |
| Right ascension | 10h 13m 02.9s[1] |
| Declination | −01° 36′ 53″[1] |
| Redshift | 224 ± 2 km/s[1] |
| Distance | 290 ± 30 kly (90 ± 10 kpc)[2][3] |
| Apparent magnitude (V) | 10.4[1] |
| Characteristics | |
| Type | dSph[1] |
| Apparent size (V) | 30′.0 × 12′.0[1] |
| Notable features | satellite galaxy of the Milky Way |
| Other designations | |
| Sextans I,[1] LEDA 88608[1] | |
The Sextans Dwarf Spheroidal is a dwarf spheroidal galaxy that was discovered in 1990 by Mike Irwin as the 8th satellite of the Milky Way,[4] located in the constellation of Sextans. It is also an elliptical galaxy, and displays a redshift because it is receding from the Sun at 224 km/s (72 km/s from the Galaxy). The distance to the galaxy is 320,000 light-years and the diameter is 8,400 light-years along its major axis.[5]
References
- 1 2 3 4 5 6 7 8 "NASA/IPAC Extragalactic Database". Results for Sextans Dwarf. Retrieved 2006-11-29.
- ↑ I. D. Karachentsev; V. E. Karachentseva; W. K. Hutchmeier; D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal. 127 (4): 2031–2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
- ↑ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.
- ↑ M. J. Irwin; P. S. Bunclark; M. T. Bridgeland; R. G. McMahon (1990). "A new satellite galaxy of the Milky Way in the constellation of Sextans". Monthly Notices of the Royal Astronomical Society. 244: 16–19. Bibcode:1990MNRAS.244P..16I.
- ↑ Hartmut Frommert. "Sextans Dwarf". SEDS. Retrieved 2015-03-21.
| Location | Milky Way → Milky Way subgroup → Local Group → Virgo Supercluster → Laniakea Supercluster → Observable universe → Universe Each arrow (→) may be read as "within" or "part of". |  | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Galactic core | |||||||||||||||
| Spiral arms | |||||||||||||||
| Satellite galaxies |
| ||||||||||||||
| Related | |||||||||||||||
 Astronomy portal | |||||||||||||||
Coordinates: 
10h 13m 02.9s, −01° 36′ 53″
This article is issued from Wikipedia - version of the 6/25/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.