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Exoplanet HD 5278 A b
Exoplanet HD 5278 A b orbits star HD 5278 A that lies 187 light years away from the Sun.
It weighs about 7.789 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
187 light years
187 light years
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HD 5278 A b
Exoplanet, sub-neptune
Star: HD 5278 A
Distance from the star: 0.12 AU
Orbit around star: 14.33918 days
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Orbital period
Orbital period of exoplanet HD 5278 A b around its star is 14.33918 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: 0.08Basic characteristic
Mass: 7.789 M Earth
Exoplanet mass
Exoplanet HD 5278 A b has 7.789 Earth masses, or 0.53 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: 2.45 R Earth | 0.2 R Jupiter
Density: 2920 kg/m3 | 52.97 % Earth
Temperature: 943.0 K | 669.85 °C
Year of discovery: 2021 (transit)
Other designations of this exoplanet
TOI-130 b
TOI-130 b
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HD 5278 system structure
Exoplanet HD 5278 A b orbits star HD 5278 A, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
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HD 5278 A | ||||||||
| HD 5278 A b | 0.12 AU | 7.8 M⊕ | 2.5 R⊕ | 14.3 days | |||||
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HD 5278 B | 130 AU | |||||||
Comparison
When comparing to the Solar system planets, HD 5278 A b has 53 % 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 | 141.62 | 9.56 | 7.79 | 70.81 | 0.02 | 0.08 | 0.53 | 0.45 |
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Size | 6.4 | 2.58 | 2.45 | 4.62 | 0.22 | 0.27 | 0.61 | 0.64 |
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Density | 0.54 | 0.56 | 0.53 | 0.72 | 2.35 | 4.19 | 2.32 | 1.69 |
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Distance | 0.31 | 0.17 | 0.12 | 0.08 | 0.02 | 0.01 | 0.01 | 0 |
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Temperature | 2.14 | 1.28 | 3.27 | 4.53 | 5.79 | 7.09 | 12.09 | 13.1 |
Habitability
Habitable zone of the star: 1.2 - 1.7 AU
The planet is too hot to sustain liquid water.
The planet is bigger than Earth and smaller than Neptune. Its average density 2920 kg/m3 points to a hot gas planet.