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
Discovered by	Hatzes et al.
Discovery site	United States
Discovery date	7 August 2000
Detection method	Doppler spectroscopy
Orbital characteristics
Semi-major axis	3.53±0.04 AU
Eccentricity	0.06+0.06; −0.04
Orbital period (sidereal)	7.32±0.07 yr
Inclination	41°+6°; −5°
Longitude of ascending node	190°±8°
Time of periastron	2458126.5+1657; −502 JD
Argument of periastron	263°+64°; −184°
Semi-amplitude	10.6 m/s
Star	Epsilon Eridani
Physical characteristics
Mass	0.98+0.10; −0.09 MJ

Epsilon Eridani b, formally named AEgir [sic],^[3] 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 is a remarkably close analog to Jupiter, with similar mass and orbit.^[2]

^ Cite error: The named reference Hatzes2000 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Thompson2025 was invoked but never defined (see the help page).
^ Cite error: The named reference Carroll2017 was invoked but never defined (see the help page).

[Hatzes2000-1] Cite error: The named reference Hatzes2000 was invoked but never defined (see the help page).

[Thompson2025-2] Cite error: The named reference Thompson2025 was invoked but never defined (see the help page).

[Carroll2017-3] Cite error: The named reference Carroll2017 was invoked but never defined (see the help page).

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