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Exoplanet HD 77946 b
Exoplanet HD 77946 b orbits star HD 77946 that lies 324 light years away from the Sun.
It weighs about 8.38 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
324 light years
324 light years
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HD 77946 b
Exoplanet, sub-neptune
Star: HD 77946
Distance from the star: 0.0720 AU
Orbit around star: 6.527282 days
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Orbital period
Orbital period of exoplanet HD 77946 b around its star is 6.527282 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: 0.140Basic characteristic
Mass: 8.38 M Earth
Exoplanet mass
Exoplanet HD 77946 b has 8.38 Earth masses, or 0.57 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: 2.705 R Earth | 0.2 R Jupiter
Density: 2334 kg/m3 | 42.34 % Earth
Temperature: 1248 K | 974.85 °C
Year of discovery: 2024 (transit)
Other designations of this exoplanet
2MASS J09070675+4640214 b, HIP 44746 b, TYC 3424−01533−1 b, WISE J090706.66+464020.9 b, TOI-1778 b
2MASS J09070675+4640214 b, HIP 44746 b, TYC 3424−01533−1 b, WISE J090706.66+464020.9 b, TOI-1778 b
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HD 77946 system structure
Exoplanet HD 77946 b orbits star HD 77946, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
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HD 77946 | ||||||||
| HD 77946 b | 0.07 AU | 8.4 M⊕ | 2.7 R⊕ | 6.5 days | |||||
Comparison
When comparing to the Solar system planets, HD 77946 b has 57 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 152.36 | 10.28 | 8.38 | 76.18 | 0.03 | 0.09 | 0.57 | 0.49 |
|
Size | 7.06 | 2.85 | 2.71 | 5.1 | 0.24 | 0.3 | 0.68 | 0.71 |
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Density | 0.43 | 0.45 | 0.42 | 0.57 | 1.88 | 3.35 | 1.86 | 1.35 |
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Distance | 0.18 | 0.1 | 0.07 | 0.05 | 0.01 | 0.01 | 0 | 0 |
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Temperature | 2.84 | 1.69 | 4.33 | 6 | 7.66 | 9.38 | 16 | 17.33 |
Habitability
Habitable zone of the star: 1.3 - 1.9 AU
The planet is too hot to sustain liquid water.
The planet is bigger than Earth and smaller than Neptune. Its average density 2334 kg/m3 points to a hot gas planet.