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Exoplanet HD 18599 A b
Exoplanet HD 18599 A b orbits star HD 18599 A that lies 126 light years away from the Sun.
It weighs about 24.097 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
126 light years
126 light years
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HD 18599 A b
Exoplanet, super-earth
Star: HD 18599 A
Distance from the star: 0.0476 AU
Orbit around star: 4.137438 days
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Orbital period
Orbital period of exoplanet HD 18599 A b around its star is 4.137438 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: 0.34Basic characteristic
Mass: 24.097 M Earth
Exoplanet mass
Exoplanet HD 18599 A b has 24.097 Earth masses, or 1.4 times the mass of Neptune.
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: 2.73 R Earth | 0.2 R Jupiter
Density: 6530 kg/m3 | 118.45 % Earth
Temperature: 935 K | 661.85 °C
Year of discovery: 2019 (transit)
Other designations of this exoplanet
TOI 179 b, TIC 207141131 b, HIP 13754 b, 2MASS J02570294-5611314 b, TYC 8494-471-1 b
TOI 179 b, TIC 207141131 b, HIP 13754 b, 2MASS J02570294-5611314 b, TYC 8494-471-1 b
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HD 18599 system structure
Exoplanet HD 18599 A b orbits star HD 18599 A, which has lower mass than Sun. It is the only known exoplanet orbiting this star
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HD 18599 A | ||||||||
| HD 18599 A b | 0.05 AU | 24.1 M⊕ | 2.7 R⊕ | 4.1 days | |||||
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HD 18599 B | 3.3 AU | |||||||
Comparison
When comparing to the Solar system planets, HD 18599 A b has 1.4 times the mass of Neptune and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 438.13 | 29.57 | 24.1 | 219.06 | 0.08 | 0.25 | 1.65 | 1.4 |
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Size | 7.13 | 2.87 | 2.73 | 5.15 | 0.24 | 0.3 | 0.68 | 0.72 |
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Density | 1.21 | 1.25 | 1.18 | 1.6 | 5.25 | 9.38 | 5.19 | 3.78 |
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Distance | 0.12 | 0.07 | 0.05 | 0.03 | 0.01 | 0 | 0 | 0 |
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Temperature | 2.13 | 1.27 | 3.25 | 4.5 | 5.74 | 7.03 | 11.99 | 12.99 |
Habitability
Habitable zone of the star: 0.75 - 1.1 AU
The planet is too hot to sustain liquid water.