Crater II dwarf galaxy

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Galaxy
Crater II dwarf galaxy
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Crater 2
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AladinLite
Constellation cups
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 11 h 49 m 14,400 s
declination -18 ° 24 ′ 46.80 ″
Appearance
Morphological type dSph  
Brightness  (visual) (20.35 ± 0.02) mag
Angular expansion (62.4 ± 5.0) ′
Physical data
Affiliation Local group  
distance (383,000 ± 3,600) ly /
(117,500 ± 1,100) pc
Absolute brightness (−8.2 ± 0.01) mag
diameter 7000 ly
history
discovery VST ATLAS Survey
Discovery date 2016
Catalog names
Very low brightness galaxy

The Crater II dwarf galaxy , also known as Crater II or Crater 2 for short , is a dwarf galaxy of the type dSph discovered in 2016 in the constellation Becher in the Local Group and one of the satellite galaxies of the Milky Way .

properties

It was discovered by the VST ATLAS Survey of the European Southern Observatory in Chile . It has a spheroid shape and is located approximately 390,000 light years from the solar system. The galaxy has a half-light radius of around 1100 parsecs and a diameter of 7000 light years, making it the fourth largest satellite galaxy in the Milky Way. Crater 2 is one of the most faintly glowing celestial objects ever discovered.

The University of Cambridge astronomer Gabriel Torrealba and his colleagues believe that Crater 2, like the Leo II , Leo IV, and Leo V dwarf galaxies, may have previously formed from the same star cluster .

additional

Web links

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

Individual evidence

  1. ↑ The Feeble Giant. Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater (March 25, 2016)