Hydra–Centaurus Supercluster

Hydra–Centaurus Supercluster
Distribution of galaxies showing the elements of the Virgo and Hydra–Centaurus Superclusters (assumed as a single structure) on the left
Observation data (Epoch J2000)
Right ascension	13h 14m 00.0s
Declination	−33° 18′ 00″
Parent structure	Virgo–Hydra–Centaurus Supercluster, Centaurus Wall, Laniakea Supercluster
Redshift	0.016000 (4,797 km/s)
Distance	~39–69.4 Mpc (127–226 Mly)
Other designations
Cen-Hya Supercluster, Hydra-Cen Supercluster, Hydra-Centaurus Supercluster, SCl 128

The Hydra–Centaurus Supercluster (SCl 128), or the Hydra and Centaurus Superclusters, also known as Hydra–Centaurus concentration, is a supercluster in two parts that is the closest neighbour of the Virgo Supercluster. Its center is located about 39 Mpc (127 Mly) away, with it extending to a maximum distance of around 69 Mpc (225 Mly).

Both Virgo and Hydra–Centaurus superclusters are connected and are sometimes considered a single structure, hence referred to as the Virgo–Hydra–Centaurus Supercluster (or sometimes simply the Centaurus Supercluster). They may reside in a larger Centaurus Wall, which also would contain elements of the Southern Supercluster or Fornax Wall, such as the Fornax Cluster. Based on a different definition of a supercluster, they would be smaller lobes of the even larger Laniakea Supercluster, which is a basin of attraction centered around the Great Attractor, as identified in 2014.