Hydra–Centaurus Supercluster

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.