Antlia II | |
---|---|
![]() Illustration | |
Observation data (J2000 epoch) | |
Pronunciation | /ˈæntliə ... / |
Constellation | Antlia |
Right ascension | 9h 35m 32.832s [1] |
Declination | -36° -46m -2.28s [1] |
Distance | 405,000 ly (124.1 kpc) [2] |
Group or cluster | Local Group |
Absolute magnitude (V) | −9.86±0.08 mag [3] |
Characteristics | |
Type | Irr-T |
Size | 11 kly |
Half-light radius (physical) | 2.5 kpc [3] |
Half-light radius (apparent) | 1.10° |
Notable features | satellite of Milky Way |
Other designations | |
Antlia 2, Ant 2, Ant Il, UGC 49743, CGCG 49794-49.4794 |
Antlia II (Ant II) 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 II has the lowest surface brightness of any galaxy discovered [4] and is ~ 100 times more diffuse than any known ultra diffuse galaxy. [1] The large size of the galaxy suggests that it is currently being tidally disrupted, and is in the process of becoming a stellar stream. [3] The southeast side of Antlia II is farther away than the northwest side, likely due to the tidal disruption. [2] It was discovered using data from the European Space Agency's Gaia spacecraft in November 2018.
{{cite journal}}
: CS1 maint: numeric names: authors list (link)