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Exoplanet 40 Eridani A b
(Unconfirmed Exoplanet)
40 Eridani A b is an unconfirmed exoplanet detected around star 40 Eridani A. More observations are needed to confirm its existence.
Sun distance
16 light years
16 light years
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40 Eridani A b
Exoplanet
Star: 40 Eridani A
Distance from the star: 0.224 AU
Orbit around star: 42 days
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Orbital period
Orbital period of exoplanet 40 Eridani A b around its star is 42 days.
The orbital period of an exoplanet is the time it takes to complete one full orbit around its star, usually measured in days. Most of the exoplanets discovered so far have orbital periods of less than one year...
More about Orbital period in StellarGuide
Basic characteristic
Mass: 8.47 M Earth
Exoplanet mass
Exoplanet 40 Eridani A b has 8.47 Earth masses, or 0.58 times the mass of Uranus.
The mass of an exoplanet is one of the most important characteristics for understanding what kind of world it is — whether it’s small and rocky like Earth or large and gaseous like Jupiter. Mass provides key information about the planet’s composition, gravity, and formation history...
More about Exoplanet mass in StellarGuide
Other designations of this exoplanet
Keid b, Omicron² Eridani b, 40 Eri b, Gliese 166 b, HD 26965 b, HIP 19849 b, HR 1325 b, LHS 23 b, LTT 1907 b, SAO 131063 b, BD-07° 780 b, omi02 Eri b
Keid b, Omicron² Eridani b, 40 Eri b, Gliese 166 b, HD 26965 b, HIP 19849 b, HR 1325 b, LHS 23 b, LTT 1907 b, SAO 131063 b, BD-07° 780 b, omi02 Eri b
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40 Eridani system structure
Exoplanet 40 Eridani A b orbits star 40 Eridani A, which has lower mass than Sun. It is the only known exoplanet orbiting this star
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40 Eridani A | ||||||||
| 40 Eridani A b unconfirmed |
0.22 AU | 8.5 M⊕ | 42 days | ||||||
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40 Eridani B | 400 AU | |||||||
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40 Eridani C | 400 AU | |||||||
Comparison
When comparing to the Solar system planets, 40 Eridani A b has 58 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 154 | 10.39 | 8.47 | 77 | 0.03 | 0.09 | 0.58 | 0.49 |
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Distance | 0.57 | 0.31 | 0.22 | 0.15 | 0.04 | 0.02 | 0.01 | 0.01 |
Habitability
Habitable zone of the star: 0.79 - 1.1 AU
The planet is too hot to sustain liquid water.
News from this star system
10. 03 2023
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