The Hydra Cluster is a galaxy cluster that contains 157 bright galaxies, appearing in the constellation Hydra. The cluster spans about ten million light years and has an unusually high proportion of dark matter. The cluster is part of the Hydra-Centaurus Supercluster located 158 million light years from earth.

Number of galaxies: 157

Constellation: Hydra

Distance (co-moving): 58.3 Mpc (190.1 Mly) h⁻¹; _0.705

Redshift: 0.0548 (16452 km/s)

Declination: −12° 05′