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Exoplanet Gliese 577 A b
Exoplanet Gliese 577 A b orbits star Gliese 577 A that lies 150 light years away from the Sun.
It weighs about 2.194 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
150 light years
150 light years
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Gliese 577 A b
Exoplanet, super-earth
Star: Gliese 577 A
Distance from the star: 0.0204 AU
Orbit around star: 1.062107 days
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Orbital period
Orbital period of exoplanet Gliese 577 A b around its star is 1.062107 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: 2.194 M Earth
Exoplanet mass
Exoplanet Gliese 577 A b has 2.194 Earth masses, or 0.15 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: 1.31 R Earth | 0.1 R Jupiter
Density: 5381 kg/m3 | 97.61 % Earth
Temperature: 1885 K | 1611.85 °C
Year of discovery: 2022 (transit)
Other designations of this exoplanet
GJ 577A b, HIP 73869 b, HD 134319 b, TYC-4183-491-1 b, BD+64 1046 b, TOI 1860 b
GJ 577A b, HIP 73869 b, HD 134319 b, TYC-4183-491-1 b, BD+64 1046 b, TOI 1860 b
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Gliese 577 system structure
Exoplanet Gliese 577 A b orbits star Gliese 577 A, which has lower mass than Sun. It is the only known exoplanet orbiting this star
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Gliese 577 A | ||||||||
| Gliese 577 A b | 0.02 AU | 2.2 M⊕ | 1.3 R⊕ | 1.1 days | |||||
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Gliese 577 B | ||||||||
Comparison
When comparing to the Solar system planets, Gliese 577 A b has 15 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 39.89 | 2.69 | 2.19 | 19.95 | 0.01 | 0.02 | 0.15 | 0.13 |
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Size | 3.42 | 1.38 | 1.31 | 2.47 | 0.12 | 0.14 | 0.33 | 0.34 |
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Density | 1 | 1.03 | 0.98 | 1.32 | 4.33 | 7.73 | 4.28 | 3.11 |
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Distance | 0.05 | 0.03 | 0.02 | 0.01 | 0 | 0 | 0 | 0 |
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Temperature | 4.28 | 2.56 | 6.55 | 9.06 | 11.56 | 14.17 | 24.17 | 26.18 |
Habitability
Habitable zone of the star: 0.97 - 1.4 AU
The planet orbits too close to its star and is exposed to extreme temperatures and radiation prohibiting life as we know it.
The planet has mass comparable to Earth.