Sextans Dwarf Spheroidal

From Wikipedia, the free encyclopedia
  (Redirected from Sextans Dwarf)
Jump to navigation Jump to search
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]
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]
See also: Galaxy, List of galaxies

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]


  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for Sextans Dwarf. Retrieved 2006-11-29. 
  2. ^ 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. 
  3. ^ 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. 
  4. ^ 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. 
  5. ^ Hartmut Frommert. "Sextans Dwarf". SEDS. Retrieved 2015-03-21. 

Coordinates: Sky map 10h 13m 02.9s, −01° 36′ 53″