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• Notes = Common name(s) or alternate name(s); comments; notable properties [for example: multiple star status, range of variability if it is a variable star, exoplanets, etc.] See also [ edit ]
Eta Eridani (η Eridani, abbreviated Eta Eri, η Eri), officially named Azha (with a silent 'h', possibly / ˈ eɪ z ə /), [8] [7] is a giant star in the constellation of Eridanus. Based on parallax measurements taken during the Hipparcos mission, it is approximately 137 light-years from the Sun .
It is an evolved red clump [12] giant star with a stellar classification of G8+ III. [3] The measured angular diameter is 2.21 mas. [13] At the star's distance, this yields a physical size of around 16 times the radius of the Sun. [6] It radiates 138 [7] times the solar luminosity from its outer atmosphere at an effective temperature of 5074 K. [8]
[1] [2] In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) [3] to catalog and standardize proper names for stars. The WGSN approved the names Theemin for υ 2 Eridani on 1 February 2017 and Beemim for υ 3 Eridani on 30 June 2017; both are now included in the List of IAU-approved Star Names. [4]
ζ Eridani (Latinised to Zeta Eridani) is the binary star's Bayer designation.WDS J03158-0849 A is its designation in the Washington Double Star Catalog.The designations of the two components as WDS J03158-0849 Aa and Ab derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).
Theta Eridani is a binary system with some evidence suggesting it is part of a multiple star system. [7] [22] The main star, θ 1 Eridani, is of spectral class A4 with a +3.2 apparent magnitude. Its companion star, θ 2 Eridani, is of spectral class A1 with an apparent magnitude of +4.1. The angular separation of the two stars is equal to 8.3 ...
Tau 2 Eridani (τ 2 Eridani, abbreviated Tau 2 Eri, τ 2 Eri), formally named Angetenar / æ ŋ ˈ ɡ ɛ t ən ɑːr /, [8] [9] is a star in the constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 4.78. [2] The distance to this star, as determined via the parallax method, is around 187 light-years.
Delta Eridani, Latinized from δ Eridani, also named Rana, is the fifth-brightest star in the constellation of Eridanus. The star is visible to the naked eye with an apparent magnitude of 3.54. It is relatively near to the Sun, with a distance of about 29.6 light-years as determined from parallax. [1]
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