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A map of the Horologium Supercluster
|Observation data (Epoch )|
|Constellation(s)||Horologium and Eridanus|
|Right ascension||03h 19m|
|Major axis||169 Mpc (551 Mly)|
|291.4 Mpc (950 Mly)|
|Binding mass||~1017 M☉|
|See also: Galaxy groups, Galaxy clusters, List of superclusters|
The Horologium Supercluster, also known as Horologium-Reticulum Supercluster, consisting of SCl 48 and SCl 49) is a massive supercluster; spanning about 550 million light-years, it has a mass of 1017 solar masses, similar to that of the Laniakea Supercluster that houses the Milky Way. It is centered on coordinates right ascension 03h 19m and declination −50° 02′, and spans an angular area of 12° × 12°.
The nearest part of the supercluster is 700 million light-years (z=0.063) away from Earth, while the far end of it is 1.2 billion light-years, visible in the constellations Horologium and Eridanus. The Horologium Supercluster has about 5,000 galaxy groups (30,000 giant galaxies and 300,000 dwarf galaxies). It includes the cluster Abell 3266.
- Fleenor, Matthew C.; Rose, James A.; Christiansen, Wayne A.; Hunstead, Richard W.; Johnston-Hollitt, Melanie; Drinkwater, Michael J.; Saunders, William (September 2005). "Large-Scale Velocity Structures in the Horologium-Reticulum Supercluster". The Astronomical Journal. 130 (3): 957–967. arXiv: . Bibcode:2005AJ....130..957F. doi:10.1086/431972.
- The Horologium Supercluster from An Atlas of the Universe