Antlia II

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.

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

See also

• Crater 2 Dwarf
• Antlia Dwarf
• Satellite galaxies of the Milky Way