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Exoplanet AU Microscopii b
Exoplanet AU Microscopii b orbits star AU Microscopii that lies 32 light years away from the Sun.
It weighs about 11.7 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
32 light years
32 light years
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AU Microscopii b
Exoplanet, sub-neptune
Star: AU Microscopii
Distance from the star: 0.08305 AU
Orbit around star: 8.463 days
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Orbital period
Orbital period of exoplanet AU Microscopii b around its star is 8.463 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: 0.12Basic characteristic
Mass: 11.7 M Earth
Exoplanet mass
Exoplanet AU Microscopii b has 11.7 Earth masses, or 0.8 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
Size: 4.19 R Earth | 0.4 R Jupiter
Density: 877 kg/m3 | 15.91 % Earth
Temperature: 593 K | 319.85 °C
Year of discovery: 2020 (transit)
Other designations of this exoplanet
AU Mic b, Gliese 803 b, GJ 803 b, LDS 720A b, HD 197481 b, HIC 102409 b, HIP 102409 b, LTT 8214 b, NLTT 49807 b, MCC 824 b, 2MASS J20450949-3120266 b, TOI-2221 b, TIC 441420236 b
AU Mic b, Gliese 803 b, GJ 803 b, LDS 720A b, HD 197481 b, HIC 102409 b, HIP 102409 b, LTT 8214 b, NLTT 49807 b, MCC 824 b, 2MASS J20450949-3120266 b, TOI-2221 b, TIC 441420236 b
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AU Microscopii system structure
Exoplanet AU Microscopii b orbits star AU Microscopii, which has lower mass than Sun. It is one of 4 known exoplanets orbiting this star.
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AU Microscopii | ||||||||
| AU Microscopii d unconfirmed |
n/a | 2.9 M⊕ | 33.4 days | ||||||
| AU Microscopii e unconfirmed |
n/a | 2.9 M⊕ | 12.7 days | ||||||
| AU Microscopii b | 0.08 AU | 11.7 M⊕ | 4.2 R⊕ | 8.5 days | |||||
| AU Microscopii c | 0.11 AU | 32.1 M⊕ | 3.1 R⊕ | 18.9 days | |||||
Comparison
When comparing to the Solar system planets, AU Microscopii b has 80 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 212.73 | 14.36 | 11.7 | 106.36 | 0.04 | 0.12 | 0.8 | 0.68 |
|
Size | 10.94 | 4.41 | 4.19 | 7.91 | 0.37 | 0.46 | 1.05 | 1.1 |
|
Density | 0.16 | 0.17 | 0.16 | 0.22 | 0.7 | 1.26 | 0.7 | 0.51 |
|
Distance | 0.21 | 0.11 | 0.08 | 0.05 | 0.02 | 0.01 | 0 | 0 |
|
Temperature | 1.35 | 0.8 | 2.06 | 2.85 | 3.64 | 4.46 | 7.6 | 8.24 |
Habitability
Habitable zone of the star: 0.39 - 0.55 AU
The planet is too hot to sustain liquid water.
The planet is bigger than Earth and smaller than Neptune. Its average density 877 kg/m3 points to a hot gas planet.
News from this star system
20. 01 2023
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