Sextans dwarf galaxy

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Galaxy
Sextans dwarf galaxy
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AladinLite
Constellation sextant
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 10 h 13 m 02.9 s
declination -01 ° 36 ′ 53 ″
Appearance
Morphological type dSph / dE3  
Brightness  (visual) 10.4 mag
Angular expansion 30.0 ′ × 12.0 ′
Physical data
Affiliation Local group  
Radial velocity (224 ± 2) km / s  
distance (290,000 ± 30,000) ly /
(90,000 ± 10,000) pc
history
discovery Mike Irwin, MT Bridgeland,

PS Bunclark and RG McMahon

Discovery date 1990
Catalog names
PGC  88608 •

The Sextans dwarf galaxy is a spheroidal dwarf galaxy (dSph). It was discovered in 1990 by astrophysicists Mike Irwin, MT Bridgeland, PS Bunclark and RG McMahon as the eighth satellite galaxy of the Milky Way in the constellation of the Sextant .

properties

The dwarf galaxy, also classified as dE3 , is moving away from the Milky Way at a speed of 224 km / s and shows a corresponding redshift . The galaxy has a distance of about 290,000 light years from our solar system .

additional

Individual evidence

  1. ↑ a b c d e f g h i NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c Sextans Dwarf . Retrieved June 11, 2009.
  3. ↑ Karachentsev, ID; Kashibadze, OG: Masses of the local group and of the M81 group estimated from distortions in the local velocity field . In: Astrophysics . 49, No. 1, 2006, pp. 3-18. bibcode : 2006Ap ..... 49 .... 3K . doi : 10.1007 / s10511-006-0002-6 .
  4. ↑ MJ Irwin, PS Bunclark, MT Bridgeland, RG McMahon, RG, Bunclark, Bridgeland, McMahon: A new satellite galaxy of the Milky Way in the constellation of Sextans . In: Monthly Notices of the Royal Astronomical Society . 244, 1990, pp. 16-19. bibcode : 1990MNRAS.244P..16I .

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