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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	05 40 06.73
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 0.6774 (Comoving) 506 Mly (155.1 Mpc)h 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.

Notes

1. ^ 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

1. ^ "Search specification: ESO 306-17". HyperLeda. Université Claude Bernard Lyon 1. Retrieved 2021-02-13.
2. ^ "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.

External links

• Jennifer, Ouellette (March 3, 2010). "Bully for ESO 306-17". Discovery News. Archived from the original on 2010-03-07.
• "ACS image of ESO 306-17". ESA/Hubble. Retrieved 2024-09-08.

v t e Constellation of Columba
List of stars in Columba Columba in Chinese astronomy
Stars	Bayer α (Phact) β (Wazn) γ δ ε η θ (Elkurud) κ λ (Tsze) μ ν ν ξ ο π π σ Variable WZ AF AP HR 1721 1758 1835 1877 1958 2069 2082 2131 2149 2263 2288 2399 2411 2445 2446 HD 43848 Other NGTS-1 NGTS-3 WASP-63
Exoplanets NGTS-1b NGTS-3Ab NGTS-4b WASP-63b
Star clusters NGC 1851
Galaxies	NGC 1792 1808 1989 1992 2090 Other ESO 306-17 PKS 0521-365
Category

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