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Exoplanet HD 187123 b
Exoplanet HD 187123 b orbits star HD 187123 that lies 150 light years away from the Sun.
It weighs about 161.306 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
150 light years
150 light years
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HD 187123 b
Exoplanet, gas giant
Star: HD 187123
Distance from the star: 0.04213 AU
Orbit around star: 3.096588 days
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Orbital period
Orbital period of exoplanet HD 187123 b around its star is 3.096588 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: 0.0093Basic characteristic
Mass: 161.306 M Earth
| 0.5076 M Jupiter
Exoplanet mass
Exoplanet HD 187123 b has 161.306 Earth masses (or 0.5076 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: 1998 (radial velocity)
Other designations of this exoplanet
BD+34°3708 b, HD 187123 b, HIC 97336 b, HIP 97336 b, SAO 68845 b, LTT 15779 b
BD+34°3708 b, HD 187123 b, HIC 97336 b, HIP 97336 b, SAO 68845 b, LTT 15779 b
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HD 187123 system structure
Exoplanet HD 187123 b orbits star HD 187123, which has bigger mass than Sun. It is one of 2 known exoplanets orbiting this star.
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HD 187123 | ||||||||
| HD 187123 b | 0.04 AU | 161.3 M⊕ | 3.1 days | ||||||
| HD 187123 c | 4.42 AU | 578 M⊕ | 3324 days | ||||||
Comparison
When comparing to the Solar system planets, HD 187123 b has 51 % of mass of Jupiter and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 2932.84 | 197.92 | 161.31 | 1466.42 | 0.51 | 1.69 | 11.05 | 9.38 |
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Distance | 0.11 | 0.06 | 0.04 | 0.03 | 0.01 | 0 | 0 | 0 |