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Exoplanet LP 791-18 d
Exoplanet LP 791-18 d orbits star LP 791-18 that lies 87 light years away from the Sun.
It weighs about 0.9 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
87 light years
87 light years
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LP 791-18 d
Exoplanet, rocky planet
Star: LP 791-18
Distance from the star: 0.01992 AU
Orbit around star: 2.753436 days
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Orbital period
Orbital period of exoplanet LP 791-18 d around its star is 2.753436 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: 0.9 M Earth
Exoplanet mass
Exoplanet LP 791-18 d has 0.9 Earth 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: 1.032 R Earth | 0.1 R Jupiter
Density: 4515 kg/m3 | 81.90 % Earth
Temperature: 395 K | 121.85 °C
Year of discovery: 2021 (transit)
Other designations of this exoplanet
2MASS J11024596-1624222 d, TIC 181804752 d, TOI-736 d
2MASS J11024596-1624222 d, TIC 181804752 d, TOI-736 d
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LP 791-18 system structure
Exoplanet LP 791-18 d orbits star LP 791-18, which has much lower mass than Sun. It is one of 3 known exoplanets orbiting this star.
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LP 791-18 | ||||||||
| LP 791-18 b | 0.01 AU | 1.1 R⊕ | 0.9 days | ||||||
| LP 791-18 d | 0.02 AU | 0.9 M⊕ | 1 R⊕ | 2.8 days | |||||
| LP 791-18 c | 0.03 AU (HZ) | 2.3 R⊕ | 5 days | ||||||
Comparison
When comparing to the Solar system planets, LP 791-18 d has 90 % of mass of Earth and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 16.36 | 1.1 | 0.9 | 8.18 | 0 | 0.01 | 0.06 | 0.05 |
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Size | 2.7 | 1.09 | 1.03 | 1.95 | 0.09 | 0.11 | 0.26 | 0.27 |
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Density | 0.84 | 0.86 | 0.82 | 1.11 | 3.63 | 6.48 | 3.59 | 2.61 |
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Distance | 0.05 | 0.03 | 0.02 | 0.01 | 0 | 0 | 0 | 0 |
|
Temperature | 0.9 | 0.54 | 1.37 | 1.9 | 2.42 | 2.97 | 5.06 | 5.49 |
Habitability
Habitable zone of the star: 0.02 - 0.03 AU
The planet is orbiting on the edge of the habitable zone of its star.
The planet has mass comparable to Earth.