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39 Eridani is a binary star also divisible in small amateur telescopes, 206 light-years from Earth. The primary is an orange-hued giant star of magnitude 4.9 and the secondary is of magnitude 8. 40 Eridani is a triple star system consisting of an orange main-sequence star, a white dwarf, and a red dwarf. The orange main-sequence star is the ...
Tau 4 Eridani (τ 4 Eridani, τ 4 Eri) is a binary star system in the constellation Eridanus.It is visible to the naked eye with an apparent visual magnitude of 3.65. [2] The distance to this star can be estimated using the parallax method, which yields a value of roughly 300 light years.
Tau 1 Eridani, Latinized from τ 1 Eridani, is a binary star [6] system in the constellation Eridanus. It has an apparent magnitude of 4.46, making it visible to the naked eye in suitably dark conditions. This is a spectroscopic binary with an orbital period of 958 days. [6] It is located about 46 light years from the Earth. [1]
Mu Eridani (μ Eridani) is a binary star system in the constellation Eridanus. It is visible to the naked eye with an apparent visual magnitude of 4.00. [3] Based upon an annual parallax shift of 0.00625 arcseconds, [2] it is located roughly 520 light years from the Sun. In 1910, this was determined to be a single-lined spectroscopic binary star
Mothra, or EMO J041608.838-240358.60, is a binary system with a possible transient, [1] in the constellation of Eridanus. Mothra is in the galaxy cluster MACS J0416.1-2403, nicknamed the "Christmas Tree Galaxy Cluster". [2]
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.
WISE J033605.05−014350.4, abbreviated to WISE J0336−0143 or W0336, is a binary system comprising two planetary-mass Y-type brown dwarfs tightly orbiting around their common center of mass. The system is located in the constellation Eridanus, about 33 light-years (10 parsecs) away from the Sun.
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).