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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 ]
Upsilon 2 Eridani (υ² Eridani, abbreviated Upsilon 2 Eri, υ 2 Eri), officially named Theemin / ˈ θ iː m ə n /, [10] [11] is a star in the constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 3.8. [2]
The Bayer designation Upsilon Eridani (υ Eri / υ Eridani) is shared by four or seven stars, in the constellation Eridanus: υ 1 Eridani (50 Eridani) υ 2 Eridani (52 Eridani) υ 3 Eridani (43 Eridani) υ 4 Eridani (41 Eridani) Some sources include the following stars: υ 5 Eridani (f Eridani) υ 6 Eridani (g Eridani) υ 7 Eridani (h Eridani)
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.
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 ...
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 .
Lambda Eridani (λ Eri) is a star in the constellation Eridanus.It is visible to the naked eye on a dark night with an apparent visual magnitude of 4.27. The distance to this star, based upon an annual parallax shift of 0.00402 arcseconds, is roughly 810 light years.
The effective temperature of the outer envelope is about 8,104 K, [5] which gives the star a white hue typical of A-type stars. [20] The projected rotational velocity is a rapid 196 km s −1, [3] compared to 2 km s −1 along the Sun's equator. [21] The star is known to vary in apparent visual magnitude, ranging between 2.72 and 2.80. [22]