Crater 2 Dwarf
Appearance
Crater 2 | |
---|---|
Observation data (J2000.0 epoch) | |
Constellation | Crater[1] |
Right ascension | 11h 49m 14.400s 177.310°±0.03°[1] |
Declination | −18° 24′ 46.80″ −18.413°±0.03°[1] |
Distance | 383,000 ly (117.5 kpc)[1] |
Apparent magnitude (V) | 20.35±0.02 mag[1] |
Absolute magnitude (V) | −8.2±0.1 mag[1] |
Characteristics | |
Type | dSph[1] |
Apparent size (V) | 62.4′ (rh=31.2′ ± 2.5′)[1] 6,950 ly (2,132 pc) rh=1066pc ± 84pc[1] |
Notable features | 4th largest satellite galaxy to Milky Way[1] |
Crater 2 is a dwarf galaxy discovered orbiting the Milky Way,[1] located approximately 380,000 ly from Earth.[2] Crater 2 was identified in imaging data from the VST ATLAS survey.[2]
The galaxy has a half-light radius of ∼1100 pc, making it the fourth largest satellite of the Milky Way.[1] It has an angular size about double of that of the moon.[2][3]
See also
References
- ^ a b c d e f g h i j k l Torrealba, G.; Koposov, S. E.; Belokurov, V.; Irwin, M. (2016). "The feeble giant. Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater". Monthly Notices of the Royal Astronomical Society. 459 (3): 2370–2378. arXiv:1601.07178. doi:10.1093/mnras/stw733.
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ignored (help)CS1 maint: unflagged free DOI (link) - ^ a b c Croswell, K. (14 April 2016). "Never-before-seen galaxy spotted orbiting the Milky Way". New Scientist. Retrieved 14 April 2016.
- ^ "Elusive Dwarf Galaxy Found Orbiting Our Milky Way". Huffington Post. Retrieved 2016-04-19.