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Exoplanet Lalande 21185 d
(Unconfirmed Exoplanet)
Lalande 21185 d is an unconfirmed exoplanet detected around star Lalande 21185. More observations are needed to confirm its existence.
Sun distance
8 light years
8 light years
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Lalande 21185 d
Exoplanet, super-earth
Star: Lalande 21185
Distance from the star: 0.5141 AU
Orbit around star: 215.62 days
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Orbital period
Orbital period of exoplanet Lalande 21185 d around its star is 215.62 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
Eccentricity: 0.15Basic characteristic
Mass: 4.1 M Earth
Exoplanet mass
Exoplanet Lalande 21185 d has 4.1 Earth masses, or 0.28 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
Year of discovery: 2022 (radial velocity)
Other designations of this exoplanet
BD+36 2147 d, G 119-052 d, Gliese 411 d, GJ 411 d, HD 95735 d, HIP 54035 d, LFT 756 d, LHS 37 d, LTT 12960 d, MCC 594 d, PLX 2576 d, SAO 62377 d, NLTT 26105 d, NSV 18593 d
BD+36 2147 d, G 119-052 d, Gliese 411 d, GJ 411 d, HD 95735 d, HIP 54035 d, LFT 756 d, LHS 37 d, LTT 12960 d, MCC 594 d, PLX 2576 d, SAO 62377 d, NLTT 26105 d, NSV 18593 d
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Lalande 21185 system structure
Exoplanet Lalande 21185 d orbits star Lalande 21185, which has lower mass than Sun. It is one of 3 known exoplanets orbiting this star.
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Lalande 21185 | ||||||||
| Lalande 21185 b | 0.08 AU | 2.7 M⊕ | 12.9 days | ||||||
| Lalande 21185 d unconfirmed |
0.51 AU | 4.1 M⊕ | 215.6 days | ||||||
| Lalande 21185 c | 2.94 AU | 13.6 M⊕ | 2946 days | ||||||
Comparison
When comparing to the Solar system planets, Lalande 21185 d has 28 % of mass of Uranus and it orbits its star a little closer than Venus.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 74.55 | 5.03 | 4.1 | 37.27 | 0.01 | 0.04 | 0.28 | 0.24 |
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Distance | 1.32 | 0.71 | 0.51 | 0.34 | 0.1 | 0.05 | 0.03 | 0.02 |
Habitability
Habitable zone of the star: 0.17 - 0.24 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.