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Exoplanet HD 199509 A b
Exoplanet HD 199509 A b orbits star HD 199509 A that lies 79 light years away from the Sun.
It weighs about 43.235 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
79 light years
79 light years
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HD 199509 A b
Exoplanet
Star: HD 199509 A
Distance from the star: 0.426 AU
Orbit around star: 99.6 days
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Orbital period
Orbital period of exoplanet HD 199509 A b around its star is 99.6 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: 0.373Basic characteristic
Mass: 43.235 M Earth
| 0.1360 M Jupiter
Exoplanet mass
Exoplanet HD 199509 A b has 43.235 Earth masses (or 0.1360 Jupiter masses).
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
Year of discovery: 2012 (radial velocity)Advertisement
HD 199509 system structure
Exoplanet HD 199509 A b orbits star HD 199509 A, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
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HD 199509 A | ||||||||
| HD 199509 A b | 0.43 AU | 43.2 M⊕ | 99.6 days | ||||||
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HD 199509 B | 18.624 AU | |||||||
Comparison
When comparing to the Solar system planets, HD 199509 A b has 45 % of mass of Saturn and it orbits its star between distances of Mercury and Venus from the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 786.09 | 53.05 | 43.24 | 393.05 | 0.14 | 0.45 | 2.96 | 2.51 |
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Distance | 1.09 | 0.59 | 0.43 | 0.28 | 0.08 | 0.04 | 0.02 | 0.01 |
Habitability
Habitable zone of the star: 0.98 - 1.4 AU
The planet is too hot to sustain liquid water.