Antlia 2
Antlia 2 (Ant 2) is a low-surface-brightness dwarf satellite galaxy of the Milky Way at a galactic latitude of 11.2°. It spans 1.26° in the sky just southeast of Epsilon Antliae. The galaxy is similar in size to the Large Magellanic Cloud, despite being 1/10,000 as bright. Antlia 2 has the lowest surface brightness of any galaxy discovered[1] and is ~ 100 times more diffuse than any known ultra diffuse galaxy.[2] It was discovered by the European Space Agency's Gaia spacecraft in November 2018.
| Antlia 2 | |
|---|---|
| Observation data (J2000 epoch) | |
| Pronunciation | /ˈæntliə ... / |
| Constellation | Antlia |
| Right ascension | 9h 35m 36s |
| Declination | −36.8° |
| Distance | 422,000 ly (129.4 kpc) |
| Absolute magnitude (V) | −8.5±0.15 mag |
| Characteristics | |
| Half-light radius (physical) | 2.9 kpc |
| Half-light radius (apparent) | 1.26° |
| Other designations | |
| Ant 2 | |
References
- "ESA's Gaia Spacecraft Spots Ghost Galaxy Lurking In Milky Way's Outskirts". Forbes. Retrieved November 20, 2018.
- Torrealba, G.; Belokurov, V.; Koposov, S. E.; Li, T. S.; Walker, M. G.; Sanders, J. L.; Geringer-Sameth, A.; Zucker, D. B.; Kuehn, K.; Evans, N. W.; Dehnen, W. (2018). "The hidden giant: Discovery of an enormous Galactic dwarf satellite in Gaia DR2". arXiv:1811.04082 [astro-ph.GA].
| Location | Milky Way → Milky Way subgroup → Local Group → Local Sheet → Virgo Supercluster → Laniakea Supercluster → Observable universe → Universe Each arrow (→) may be read as "within" or "part of". |  The Milky Way Galaxy | |||||||
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