ESO 306-17
| ESO 306-17 | |
|---|---|
Image of ESO 306-17 by the Hubble Space Telescope Release date: 4 March 2010 | |
| Observation data (J2000.0 epoch) | |
| Constellation | Columba |
| Right ascension | 05h 40m 06.73s |
| Declination | −40° 50′ 10.6″ |
| Redshift | 0.035805±0.000083 |
| Heliocentric radial velocity | 10,734±25 km/s |
| Galactocentric velocity | 10,544±26 km/s |
| Distance | 517.3 ± 36.20 Mly (158.6 ± 11.1 Mpc)h−1 0.6774 (Comoving) 506 Mly (155.1 Mpc)h−1 0.6774 (Light-travel) |
| Apparent magnitude (B) | 13.36 |
| Characteristics | |
| Type | E+3 |
| Size | 1,070,000 ly × 706,100 ly (328.04 kpc × 216.50 kpc) (diameter; 90% total B-band light) 399,300 ly × 287,500 ly (122.42 kpc × 88.15 kpc) (diameter; "total" magnitude) |
| Apparent size (V) | 2.5′ × 1.5′ (V-band) |
| Other designations | |
| MCG -07-12-009, PGC 17570 | |
ESO 306-17 is a fossil group giant elliptical galaxy in the Columba constellation, about 1.07 million light-years in diameter, and roughly 517 million light-years away.
The galaxy is situated alone in a volume of space about it. It is theorized that the galaxy cannibalized its nearest companions, hence, being a fossil group. The galaxy is a giant elliptical of type cD3 (E+3), one of the largest types of galaxies.