Virgo I

Virgo I is an extremely faint satellite galaxy of the Milky Way.^[2] It was discovered in the Subaru Strategic Survey. Virgo I has an absolute visual magnitude of −0.8 making it one of the least luminous galaxies confirmed thus far. The galaxy has a radius of 124 light years, (half light radius 38 pc) meaning that it is too big to be a globular cluster.^[2] Cetus II is dimmer, but too small to be classed as a galaxy.^[2] Virgo I is dimmer than Segue I, the previous dimmest known. The distance to Virgo I is 87 kiloparsecs (280,000 ly).^[1]

Virgo I
Observation data (J2000 epoch)
Constellation	Virgo
Right ascension	12h 00m 09.6s[1]
Declination	−00° 40′ 48″[1]
Distance	280+42 −26 kly (87 +13 −8 kpc)[1]
Absolute magnitude (V)	−0.8 ± 0.9[1]
Characteristics
Type	dSph[1]
Half-light radius (physical)	38+12 −11 pc[1]
Half-light radius (apparent)	1.5′[1]
Other designations
Virgo I