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40 Eridani is a triple star system in the constellation of Eridanus, abbreviated 40 Eri. It has the Bayer designation Omicron 2 Eridani, which is Latinized from ο 2 Eridani and abbreviated Omicron 2 Eri or ο 2 Eri. Based on parallax measurements taken by the Gaia mission, it is about 16.3 light-years from the Sun.
Eridanus is a constellation which stretches along the southern celestial hemisphere. ... 40 Eridani is a triple star system consisting of an orange main-sequence star
This is the list of notable stars in the constellation Eridanus, sorted by decreasing brightness. Name B F G. Var HD HIP RA Dec vis. mag. abs. ... −40° 18′ 17.0
Pages in category "Eridanus (constellation)" The following 200 pages are in this category, out of approximately 209 total. ... 40 Eridani; 45 Eridani; 51 Eridani; 51 ...
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.
The Eridanus Group, sometimes called the Eridanus Cloud, is a nearby loose grouping of galaxies at a mean distance of approximately 75 Mly (23 ± 2 Mpc) in the constellation Eridanus. [1] Redshift values show that there are approximately 200 galaxies associated with the group, approximately 70% of which are spiral and irregular type galaxies ...
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They were able to measure the mass of the black hole. They determined the mass of about 660 million solar-masses with an uncertainty of just 10%. NGC 1332's black hole is the most massive black hole in the Eridanus Cluster, and it is even more massive than NGC 1399's black hole (NGC 1399 is the Fornax cluster's central galaxy). [8]