An artist's impression of Epsilon Eridani b, depicting it as a gas giant with rings. The object near the bottom is a hypothetical moon.
Discovery[1]
Discovered by
Hatzes et al.
Discovery site
United States
Discovery date
7 August 2000
Detection method
Doppler spectroscopy
Orbital characteristics[2]
Semi-major axis
3.53±0.06 AU
Eccentricity
0.26±0.04
Orbital period (sidereal)
2,688.60+16.17 −16.51 d 7.36+0.04 −0.05 yr
Inclination
130.60°+9.53° −12.62°
Longitude of ascending node
206.07°+15.14° −17.48°
Time of periastron
2444411.54+76.60 −81.95 JD
Argument of periastron
166.48°+6.63° −6.66°
Semi-amplitude
9.98+0.43 −0.38 m/s
Star
Epsilon Eridani
Physical characteristics
Mass
0.76+0.14 −0.11MJ[2]
Temperature
~150 K (−123 °C; −190 °F)[3]
Epsilon Eridani b, also known as AEgir [sic],[4] is an exoplanet approximately 10.5 light-years away orbiting the star Epsilon Eridani, in the constellation of Eridanus (the River). The planet was discovered in 2000, and as of 2023 remains the only confirmed planet in its planetary system. It orbits at around 3.5 AU with a period of around 7.6 years, and has a mass around 0.6 times that of Jupiter.[5] As of 2023[update], both the Extrasolar Planets Encyclopaedia and the NASA Exoplanet Archive list the planet as 'confirmed'.[6][7]
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^ abCite error: The named reference Feng2023 was invoked but never defined (see the help page).
^Cite error: The named reference MawetHirsch2019 was invoked but never defined (see the help page).
^Cite error: The named reference Carroll2017 was invoked but never defined (see the help page).
^Cite error: The named reference Benedict2022 was invoked but never defined (see the help page).
^Cite error: The named reference exoplaneteu_epsErib was invoked but never defined (see the help page).
^Cite error: The named reference NASAExoplanetArchive_epsEri was invoked but never defined (see the help page).
EpsilonEridanib, also known as AEgir [sic], is an exoplanet approximately 10.5 light-years away orbiting the star EpsilonEridani, in the constellation...
EpsilonEridani (Latinized from ε Eridani), proper name Ran, is a star in the southern constellation of Eridanus. At a declination of −9.46°, it is visible...
Gonzalez, Carlos Alberto Gomez (2019-01-03). "Deep exploration of $\epsilon$ Eridani with Keck Ms-band vortex coronagraphy and radial velocities: mass and...
nature of this planet has been approved. EpsilonEridanib, another nearby Jupiter-like exoplanet Gliese 832 b, another nearby Jupiter-like exoplanet Feng...
to orbit with semi-amplitude of 17.9 m/s. 51 Pegasi b 91 Aquarii b 109 Piscium bEpsilonEridanib Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets"...
Jupiter orbiting Epsilon Tauri every 645 days, or nearly 2 years with an eccentricity of 0.15. 4 Ursae Majoris bEpsilonEridanibEpsilon Reticuli Ab The...
(with effort). The star EpsilonEridani was named Ran (after Rán, the Norse goddess of the sea), and the planet EpsilonEridanib was named AEgir (after...
Dimitri; et al. (6 October 2021). "Constraining the Orbit and Mass of epsilonEridanib with Radial Velocities, Hipparcos IAD-Gaia DR2 Astrometry, and Multiepoch...
encounter with EpsilonEridani at the minimal distance of about 0.93 ly. Gliese 65 can penetrate a conjectured Oort cloud about EpsilonEridani, which may...
Maja, discovered 1861. Aegir, a moon of Saturn, named 2007 and Ægir (EpsilonEridanib), an exoplanet, named 2015. 558 Carmen, discovered 1905, and Carme...
about 45 years. ε Indi Ab is the second-closest Jovian exoplanet, after ε Eridanib. The ε Indi system provides a benchmark case for the study of the formation...
belts or one vast asteroid belt. The stars Fomalhaut, HD 69830 and EpsilonEridani are examples of systems with one large asteroid belt. The Solar System...
23e5022X. doi:10.1088/1674-4527/accb7e. Greenhill; et al. (2002). "epsilonEridani, upsilon Andromedae, 51 Pegasi, HD 209458, HD 196050". IAU Circ. 7985:...
and Mark Zuckerberg. A flyby mission has been proposed to Proxima Centauri b, an Earth-sized exoplanet in the habitable zone of its host star, Proxima...
candidates for the Terrestrial Planet Finder (Epsilon Indi, EpsilonEridani, 40 Eridani, Alpha Centauri B, and Tau Ceti). Turnbull's work has continued...
known as the "fabulous four": Vega, Beta Pictoris, Fomalhaut, and EpsilonEridani. Subsequently, direct images of the Beta Pictoris disk showed irregularities...
magnitude derived from adding the magnitudes of Mizar A (2.220 ±0.003) and Mizar B (3.88) as per the formula: 2.01 ≈ − 2.5 log 10 ( 10 − 0.4 ⋅ 2.220 + 10 −...
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