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Exoplanet Gliese 251 c
Exoplanet Gliese 251 c orbits star Gliese 251 that lies 18 light years away from the Sun.
It weighs about 3.88 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
18 light years
18 light years
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Gliese 251 c
Exoplanet
Star: Gliese 251
Distance from the star: 0.196 AU
Orbit around star: 53.647 days
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Orbital period
Orbital period of exoplanet Gliese 251 c around its star is 53.647 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: 3.88 M Earth
Exoplanet mass
Exoplanet Gliese 251 c has 3.88 Earth masses, or 0.27 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
Temperature: 216 K | -57.15 °C
Year of discovery: 2025 (radial velocity)
Other designations of this exoplanet
LHS 1879 c, Ross 578 c, Wolf 294 c, HD 265866 c, HIP 33226 c, LHS 1879 c, LTT 11941 c, GJ 251 c
LHS 1879 c, Ross 578 c, Wolf 294 c, HD 265866 c, HIP 33226 c, LHS 1879 c, LTT 11941 c, GJ 251 c
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Gliese 251 system structure
Exoplanet Gliese 251 c orbits star Gliese 251, which has lower mass than Sun. It is one of 2 known exoplanets orbiting this star.
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Gliese 251 | ||||||||
| Gliese 251 b | 0.08 AU | 3.9 M⊕ | 14.2 days | ||||||
| Gliese 251 c | 0.2 AU | 3.9 M⊕ | 53.6 days | ||||||
Comparison
When comparing to the Solar system planets, Gliese 251 c has 27 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 70.55 | 4.76 | 3.88 | 35.27 | 0.01 | 0.04 | 0.27 | 0.23 |
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Distance | 0.5 | 0.27 | 0.2 | 0.13 | 0.04 | 0.02 | 0.01 | 0.01 |
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Temperature | 0.49 | 0.29 | 0.75 | 1.04 | 1.33 | 1.62 | 2.77 | 3 |
Habitability
Habitable zone of the star: 0.12 - 0.18 AU
The planet is orbiting on the edge of the habitable zone of its star.