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Exoplanet Ross 128 b
Exoplanet Ross 128 b orbits star Ross 128 that lies 11 light years away from the Sun.
It weighs about 1.399 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
11 light years
11 light years
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Ross 128 b
Exoplanet, super-earth
Star: Ross 128
Distance from the star: 0.05 AU
Orbit around star: 9.8596 days
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Orbital period
Orbital period of exoplanet Ross 128 b around its star is 9.8596 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
Basic characteristic
Mass: 1.399 M Earth
Exoplanet mass
Exoplanet Ross 128 b has 1.399 Earth 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: 1.2 R Earth | 0.1 R Jupiter
Density: 4464 kg/m3 | 80.97 % Earth
Temperature: 260 K | -13.15 °C
Year of discovery: 2017 (radial velocity)
Other designations of this exoplanet
FI Virginis b, FI Vir b, G 010-050 b, GCTP 2730 b, GJ 447 b, Gliese 447 b, HIC 57548 b, HIP 57548 b, LHS 315 b, Vyssotsky 286 b, LTT 13240 b, LFT 852 b, LSPM PM I11477+0048 b, 2MASS J11474440+0048164 b
FI Virginis b, FI Vir b, G 010-050 b, GCTP 2730 b, GJ 447 b, Gliese 447 b, HIC 57548 b, HIP 57548 b, LHS 315 b, Vyssotsky 286 b, LTT 13240 b, LFT 852 b, LSPM PM I11477+0048 b, 2MASS J11474440+0048164 b
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Ross 128 system structure
Exoplanet Ross 128 b orbits star Ross 128, which has much lower mass than Sun. It is the only known exoplanet orbiting this star
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Ross 128 | ||||||||
| Ross 128 b | 0.05 AU (HZ) | 1.4 M⊕ | 1.2 R⊕ | 9.9 days | |||||
Comparison
When comparing to the Solar system planets, Ross 128 b has 1.4 times the mass of Earth and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 25.44 | 1.72 | 1.4 | 12.72 | 0 | 0.01 | 0.1 | 0.08 |
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Size | 3.13 | 1.26 | 1.2 | 2.26 | 0.11 | 0.13 | 0.3 | 0.32 |
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Density | 0.83 | 0.85 | 0.81 | 1.1 | 3.59 | 6.41 | 3.55 | 2.58 |
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Distance | 0.13 | 0.07 | 0.05 | 0.03 | 0.01 | 0.01 | 0 | 0 |
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Temperature | 0.59 | 0.35 | 0.9 | 1.25 | 1.6 | 1.95 | 3.33 | 3.61 |
Habitability
Habitable zone of the star: 0.04 - 0.06 AU
The planet is orbiting inside the habitable zone of its star.
The planet has mass comparable to Earth.