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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 ]
The star also possesses a rotating circumstellar disc, seen edge on, which makes Lambda Eri a "shell star", where the disk appears more opaque than usual. [16] Like most Be stars, Lambda Eridani emits soft X-rays. In 1993, a giant X-ray flare was observed in which the X-ray luminosity increased by a factor of six over a 39-hour period. [4]
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 .
Delta Eridani, which is Latinized from δ Eridani, is the fifth-brightest star in the constellation of Eridanus.. The star is visible to the naked eye and has been observed to vary slightly in brightness between magnitudes 3.51 and 3.56, [2] although subsequent observations did not bear this out. [11]
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]
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.
Upsilon 3 Eridani (υ 3 Eridani, abbreviated Upsilon 3 Eri, υ 3 Eri), officially named Beemim / ˈ b iː m ə m /, [10] is a star in the constellation of Eridanus.It is visible to the naked eye with an apparent visual magnitude of 3.96 [2] The distance to this star, based upon an annual parallax shift of 11.01 mas, [1] is around 296 light-years.
χ Eridani (Latinised as Chi Eridani) is a binary star [10] system in the constellation Eridanus. It is visible to the naked eye with an apparent visual magnitude of 3.70. [2] The distance to this system, as determined using the parallax method, is around 58 light years. [1] The pair had an angular separation of 5.0 arcseconds as of 1994.