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Eridanus is a constellation which stretches along the southern celestial hemisphere. It is represented as a river . One of the 48 constellations listed by the 2nd century AD astronomer Ptolemy , it remains one of the 88 modern constellations .
The Horologium-Reticulum Supercluster, is a massive supercluster spanning around 550 million light-years. [1] It has a mass of around 10 17 solar masses, similar to that of the Laniakea Supercluster, which houses the Milky Way.
NGC 1403 is a lenticular [2] or elliptical galaxy [3] in the constellation Eridanus. It was discovered in 1886 by Francis Preserved Leavenworth . [ 4 ] It was thought to be a "very faint, extremely small, nebulous star" by John Louis Emil Dreyer , the compiler of the New General Catalogue .
NGC 1285 is a barred spiral galaxy in the constellation of Eridanus.Its velocity with respect to the cosmic microwave background is 5081 ± 12 km/s, which corresponds to a Hubble distance of 244.4 ± 17.1 Mly (74.94 ± 5.25 Mpc). [1]
Constellation: Eridanus: Right ascension: 3 h 9 m 39.1 s [1] ... X-Ray, Astrophoto, Sky Map, Articles and images This page was last edited on 25 July 2023, at 03:34 ...
Theta Eridani, Latinized from θ Eridani, is a binary system in the constellation of Eridanus with a combined apparent magnitude of 2.88. [6] Its two components are designated θ 1 Eridani, formally named Acamar / ˈ æ k ə m ɑːr / (the traditional name of the system), [13] [14] and θ 2 Eridani.
Achernar is the brightest star in the constellation of Eridanus and the ninth-brightest in the night sky. It has the Bayer designation Alpha Eridani, which is Latinized from α Eridani and abbreviated Alpha Eri or α Eri. The name Achernar applies to the primary component [14] of a binary system. [5]
40 Eridani is the system's Flamsteed designation and ο² Eridani (Latinised to Omicron 2 Eridani) its Bayer designation.The designations of the sub-components – 40 Eridani A, B and C – derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).