Horologium-Reticulum Supercluster

The Horologium-Reticulum Supercluster, is a massive supercluster spanning around 550 million light-years.^[1] It has a mass of around 10¹⁷ solar masses, similar to that of the Laniakea Supercluster, which houses the Milky Way. It is centered on coordinates right ascension 03^h 19^m and declination −50° 02′, and spans an angular area of 12° × 12°.^[2]

Horologium Supercluster
A map of the Horologium Supercluster
Observation data (Epoch )
Constellation(s)	Horologium and Eridanus
Right ascension	03h 19m
Declination	−50° 02′
Major axis	169 Mpc (551 Mly)
Distance	291.4 Mpc (950 Mly)
Binding mass	~1017 M☉
Other designations
Horologium-Reticulum Supercluster

The nearest part of the supercluster is 700 million light-years away from Earth, while the far end of it is 1.2 billion light-years. It is 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).^[3] It includes the galaxy cluster Abell 3266.

See also

• Abell catalog
• Large scale structure of the universe
• List of Abell clusters
• List of superclusters
• List of largest galaxy superclusters