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Exoplanet 51 Eridani b
Exoplanet 51 Eridani b orbits star 51 Eridani that lies 97 light years away from the Sun.
It weighs about 1303.419 Earth masses and orbits its star further than Earth orbits Sun.
Sun distance
97 light years
97 light years
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51 Eridani b
Exoplanet, gas giant
Star: 51 Eridani
Distance from the star: 11.1 AU
Orbit around star: 28.1 days
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Orbital period
Orbital period of exoplanet 51 Eridani b around its star is 28.1 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: 1303.419 M Earth
| 4.1014 M Jupiter
Exoplanet mass
Exoplanet 51 Eridani b has 1303.419 Earth masses (or 4.1014 Jupiter masses).
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
Size: 12.442 R Earth | 1.1 R Jupiter
Density: 3731 kg/m3 | 67.68 % Earth
Temperature: 700 K | 426.85 °C
Year of discovery: 2015 (imaging)
Other designations of this exoplanet
c Eridani b, BD−02° 963 b, HD 29391 b, HIC 21547 b, HIP 21547 b, HR 1474 b, SAO 131358 b, 2MASS J04373613-0228248 b, * 51 Eri b
c Eridani b, BD−02° 963 b, HD 29391 b, HIC 21547 b, HIP 21547 b, HR 1474 b, SAO 131358 b, 2MASS J04373613-0228248 b, * 51 Eri b
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51 Eridani system structure
Exoplanet 51 Eridani b orbits star 51 Eridani, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
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51 Eridani | ||||||||
| 51 Eridani b | 11.1 AU | 1303.4 M⊕ | 12.4 R⊕ | 28.1 days | |||||
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Gliese 3305 A | ||||||||
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Gliese 3305 B | ||||||||
Comparison
When comparing to the Solar system planets, 51 Eridani b has 4.1 times the mass of Jupiter and it orbits its star between distances of Saturn and Uranus from the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 23698.53 | 1599.29 | 1303.42 | 11849.26 | 4.1 | 13.69 | 89.28 | 75.78 |
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Size | 32.49 | 13.1 | 12.44 | 23.48 | 1.11 | 1.37 | 3.11 | 3.27 |
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Density | 0.69 | 0.71 | 0.68 | 0.92 | 3 | 5.36 | 2.97 | 2.16 |
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Distance | 28.46 | 15.35 | 11.1 | 7.28 | 2.13 | 1.16 | 0.58 | 0.37 |
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Temperature | 1.59 | 0.95 | 2.43 | 3.37 | 4.29 | 5.26 | 8.97 | 9.72 |
Habitability
Habitable zone of the star: 2.4 - 3.5 AU
The planet is too cold to sustain liquid water on its surface. It is however possible that there is environment with higher temperatures on some of its potential moons.
The planet is probably a gas giant and has no surface, however life could still be possible on the potential moons orbiting it.