Virgo I
| Virgo I | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 00m 09.6s |
| Declination | −00° 40′ 48″ |
| Distance | 280+42 −26 kly (87 +13 −8 kpc) |
| Absolute magnitude (V) | −0.8 ± 0.9 |
| Characteristics | |
| Type | dSph |
| Half-light radius (physical) | 38+12 −11 pc |
| Half-light radius (apparent) | 1.5′ |
| Other designations | |
| Virgo I | |
Virgo I is an extremely faint satellite galaxy of the Milky Way. 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. Cetus II is dimmer, but too small to be classed as a galaxy. Virgo I is dimmer than Segue I, the previous dimmest known. The distance to Virgo I is 87 kiloparsecs (280,000 ly).