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Exoplanet TW Hydrae b
(Unconfirmed Exoplanet)
TW Hydrae b is an unconfirmed exoplanet detected around star TW Hydrae. More observations are needed to confirm its existence.
Sun distance
196 light years
196 light years
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TW Hydrae b
Exoplanet
Star: TW Hydrae
Distance from the star: 22 AUBasic characteristic
Mass: 23.72 M Earth
Exoplanet mass
Exoplanet TW Hydrae b has 23.72 Earth masses, or 1.38 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: 4.25 R Earth | 0.4 R Jupiter
Density: 1704 kg/m3 | 30.91 % Earth
Temperature: 40 K | -233.15 °C
Year of discovery: 2007
Other designations of this exoplanet
TWA 1 b, TW Hya b, CD−34° 7151 b, HIP 53911 b
TWA 1 b, TW Hya b, CD−34° 7151 b, HIP 53911 b
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TW Hydrae system structure
Exoplanet TW Hydrae b orbits star TW Hydrae, which has lower mass than Sun. It is one of 2 known exoplanets orbiting this star.
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|
TW Hydrae | ||||||||
| TW Hydrae disc | 3 AU | - | |||||||
| TW Hydrae b unconfirmed |
22 AU | 23.7 M⊕ | 4.3 R⊕ | - | |||||
| TW Hydrae c unconfirmed |
42 AU | 4 M⊕ | - | ||||||
Comparison
When comparing to the Solar system planets, TW Hydrae b has 1.38 times the mass of Neptune and it orbits its star between distances of Uranus and Neptune from the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 431.27 | 29.1 | 23.72 | 215.64 | 0.07 | 0.25 | 1.62 | 1.38 |
|
Size | 11.1 | 4.47 | 4.25 | 8.02 | 0.38 | 0.47 | 1.06 | 1.12 |
|
Density | 0.32 | 0.33 | 0.31 | 0.42 | 1.37 | 2.45 | 1.35 | 0.99 |
|
Distance | 56.41 | 30.43 | 22 | 14.44 | 4.23 | 2.31 | 1.15 | 0.73 |
|
Temperature | 0.09 | 0.05 | 0.14 | 0.19 | 0.25 | 0.3 | 0.51 | 0.56 |
Habitability
Habitable zone of the star: 72.9 - 105 AU
The planet is too hot to sustain liquid water.