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Exoplanet HR 8799 b
Exoplanet HR 8799 b orbits star HR 8799 that lies 133 light years away from the Sun.
It weighs about 2225.349 Earth masses and orbits its star further than Earth orbits Sun.
Sun distance
133 light years
133 light years
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HR 8799 b
Exoplanet, gas giant
Star: HR 8799
Distance from the star: 68 AU
Orbit around star: 164250.0 days
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Orbital period
Orbital period of exoplanet HR 8799 b around its star is 164250.0 days (or 449.7 years).
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: 0.0Basic characteristic
Mass: 2225.349 M Earth
| 7.0024 M Jupiter
Exoplanet mass
Exoplanet HR 8799 b has 2225.349 Earth masses (or 7.0024 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
Size: 13.451 R Earth | 1.2 R Jupiter
Density: 5041 kg/m3 | 91.44 % Earth
Year of discovery: 2008 (imaging)
Other designations of this exoplanet
HD 218396 b, V342 Pegasi b, BD+20 5278 b, FK5 3850 b, GC 32209 b, HIP 114189 b, PPM 115157 b, SAO 91022 b, TYC 1718-2350-1 b
HD 218396 b, V342 Pegasi b, BD+20 5278 b, FK5 3850 b, GC 32209 b, HIP 114189 b, PPM 115157 b, SAO 91022 b, TYC 1718-2350-1 b
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HR 8799 system structure
Exoplanet HR 8799 b orbits star HR 8799, which has bigger mass than Sun. It is one of 5 known exoplanets orbiting this star.
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HR 8799 | ||||||||
| HR 8799 f unconfirmed |
6.94 AU | 524.5 M⊕ | 0 days | ||||||
| HR 8799 e | 16.4 AU | 3051.9 M⊕ | 13.1 R⊕ | 18000 days | |||||
| HR 8799 d | 27 AU | 2638.6 M⊕ | 13.5 R⊕ | 41054 days | |||||
| HR 8799 c | 42.9 AU | 2638.6 M⊕ | 14.6 R⊕ | 82145 days | |||||
| HR 8799 b | 68 AU | 2225.3 M⊕ | 13.5 R⊕ | 164250 days | |||||
Comparison
When comparing to the Solar system planets, HR 8799 b has 7 times the mass of Jupiter and it orbits its star between distances of Neptune and from the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 40460.89 | 2730.49 | 2225.35 | 20230.45 | 7 | 23.38 | 152.42 | 129.38 |
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Size | 35.13 | 14.16 | 13.45 | 25.38 | 1.2 | 1.48 | 3.36 | 3.54 |
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Density | 0.93 | 0.96 | 0.91 | 1.24 | 4.05 | 7.24 | 4.01 | 2.92 |
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Distance | 174.36 | 94.05 | 68 | 44.62 | 13.07 | 7.13 | 3.55 | 2.26 |
Habitability
Habitable zone of the star: 2.5 - 3.7 AU
The planet is too cold to sustain liquid water on its surface. It is however possible that there is environment with higher temperatures on some of its potential moons.
The planet is probably a gas giant and has no surface, however life could still be possible on the potential moons orbiting it.
News from this star system
15. 03 2023
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