[10] In December 2015, the IAU announced the winning names were AEgir [sic] for the planet (pronounced /ˈiːdʒər/ [Anglicized] or /ˈeɪjɪər/, an approximation of the old Norse Ægir) and Ran for the star.

[13] The planet's existence was suspected by a Canadian team led by Bruce Campbell and Gordon Walker in the early 1990s, but their observations were not definitive enough to make a solid discovery.

[1] Observers, including Geoffrey Marcy, suggested that more information on the star's Doppler noise behaviour created by its large and varying magnetic field was needed before the planet could be confirmed.

[20] Astronomers continue to collect and analyse radial velocity data, while also refining existing upper limits from non-detection via direct imaging, on Epsilon Eridani b.

Naval Observatory Robotic Astrometric Telescope (URAT) combined with previously collected data from the Hipparcos mission, and the newer Gaia EDR3 data release, a group of scientists at the United States Naval Observatory believe they have, with high formal confidence levels, confirmed the presence of a long-period exoplanet orbiting Epsilon Eridani.

[22][23][nb 1] Similar updated findings were published in a paper in July 2021, determining a minimum mass of 0.651 that of Jupiter, with the planet's semi-major axis at 3.5 AU orbiting with an eccentricity of 0.044.