Grus I dwarf galaxy

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Galaxy
Grus-I dwarf galaxy
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AladinLite
Constellation crane
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 22 h 56 m 42.4 s
declination -50 ° 09 ′ 47.9 ″
Appearance
Morphological type dSph  
Brightness  (visual) (17.0 ± 0.3) mag
Physical data
Affiliation Local group  
distance 432,000 ly /
120,000 pc
Absolute brightness (−3.4 ± 0.3) mag
history
discovery Dark Energy Survey
Discovery date 2015
Catalog names
Gru I dSph

The Grus I dwarf galaxy , also Grus I or Grus 1 for short , is a dwarf galaxy of the type dSph discovered in 2015 in the constellation Crane in the Local Group and one of the satellite galaxies of the Milky Way .

properties

Gru I dSph has a half-light radius of , which corresponds to a size of ( )  pc at a distance of about 120 kpc .  

additional

Web links

Commons : Constellation Crane  - Collection of images, videos and audio files

Individual evidence

  1. Sergey E. Koposov, Vasily Belokurov, Gabriel Torrealba, N. Wyn Evans: Beasts of the Southern Wild. Discovery of a large number of Ultra Faint satellites in the vicinity of the Magellanic Clouds . In: The Astrophysical Journal . 805, March 10, 2015, p. 130. doi : 10.1088 / 0004-637X / 805/2/130 .
  2. DES Collaboration: Eight New Milky Way Companions Discovered in First-Year Dark Energy Survey Data . In: The Astrophysical Journal . 807, March 10, 2015, p. 50. doi : 10.1088 / 0004-637X / 807/1/50 .