Epsilon Eridani b

Epsilon Eridani b / AEgir
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 byHatzes et al.
Discovery siteUnited States
Discovery date7 August 2000
Doppler spectroscopy
Orbital characteristics[2]
3.53±0.06 AU
Eccentricity0.26±0.04
2,688.60+16.17
−16.51 d
7.36+0.04
−0.05 yr
Inclination130.60°+9.53°
−12.62°
206.07°+15.14°
−17.48°
2444411.54+76.60
−81.95 JD
166.48°+6.63°
−6.66°
Semi-amplitude9.98+0.43
−0.38 m/s
StarEpsilon Eridani
Physical characteristics
Mass0.76+0.14
−0.11 MJ[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 2024 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, both the Extrasolar Planets Encyclopaedia and the NASA Exoplanet Archive list the planet as 'confirmed'.[6][7]

  1. ^ Cite error: The named reference Hatzes2000 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Feng2023 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference MawetHirsch2019 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Carroll2017 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Benedict2022 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference exoplaneteu_epsErib was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference NASAExoplanetArchive_epsEri was invoked but never defined (see the help page).