Sextans Dwarf Spheroidal

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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]
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]

References[edit]

  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″