ESO 306-17 is a fossil group giant elliptical galaxy in the Columba constellation, about 1.07 million light-years in diameter,[2][4] and roughly 517 million light-years away.[2]

ESO 306-17
Image of ESO 306-17 by the Hubble Space Telescope
Release date: 4 March 2010
Observation data (J2000.0 epoch)
ConstellationColumba
Right ascension05h 40m 06.73s[1]
Declination−40° 50′ 10.6″[1]
Redshift0.035805±0.000083[2]
Heliocentric radial velocity10,734±25 km/s[2]
Galactocentric velocity10,544±26 km/s[2]
Distance517.3 ± 36.20 Mly (158.6 ± 11.1 Mpc)h−1
0.6774

(Comoving)[2]
506 Mly (155.1 Mpc)h−1
0.6774

(Light-travel)
Apparent magnitude (B)13.36[1]
Characteristics
TypeE+3[2]
Size1,070,000 ly × 706,100 ly
(328.04 kpc × 216.50 kpc)
(diameter; 90% total B-band light)[2][a]
399,300 ly × 287,500 ly
(122.42 kpc × 88.15 kpc)
(diameter; "total" magnitude)[2][a]
Apparent size (V)2.5 × 1.5 (V-band)[2]
Other designations
MCG -07-12-009, PGC 17570[3]

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.[5] The galaxy is a giant elliptical of type cD3[2] (E+3), one of the largest types of galaxies.

Notes

edit
  1. ^ a b The quoted diameter in this infobox was based on NED's provided scale "Virgo + GA + Shapley" of 769 pc/arcsec multiplied with given angular diameters.

References

edit
  1. ^ a b c "Search specification: ESO 306-17". HyperLeda. Université Claude Bernard Lyon 1. Retrieved 2021-02-13.
  2. ^ a b c d e f g h i j k "Results for object NGC ESO 306-17 (ESO 306-17)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-02-13.
  3. ^ "ESO 306-17". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-13.
  4. ^ Boyle, Alan (2010-03-04). "A giant among galaxies?". NBC News. Retrieved 2024-09-08.
  5. ^ Baldwin, Emily (4 March 2010). "Bully galaxy rules the neighbourhood". Astronomy Now. Archived from the original on 2010-03-07.
edit