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Exoplanet UPM J1738-4738 b
Exoplanet UPM J1738-4738 b orbits star UPM J1738-4738 that lies 89 light years away from the Sun.
It weighs about 1.83 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
89 light years
89 light years
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UPM J1738-4738 b
Exoplanet, rocky planet, ultra-short period
Star: UPM J1738-4738
Distance from the star: 0.0056255 AU
Orbit around star: 0.301100 days
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Orbital period
Orbital period of exoplanet UPM J1738-4738 b around its star is 0.301100 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: 1.83 M Earth
Exoplanet mass
Exoplanet UPM J1738-4738 b has 1.83 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: 1.11 R Earth | 0.1 R Jupiter
Density: 7377 kg/m3 | 133.81 % Earth
Temperature: 1122 K | 848.85 °C
Year of discovery: 2026 (transit)
Other designations of this exoplanet
TOI-4552 b, TIC 248250955 b, 2MASS J17385163-4738056 b, Gaia 5948579462188230144 b
TOI-4552 b, TIC 248250955 b, 2MASS J17385163-4738056 b, Gaia 5948579462188230144 b
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UPM J1738-4738 system structure
Exoplanet UPM J1738-4738 b orbits star UPM J1738-4738, which has lower mass than Sun. It is the only known exoplanet orbiting this star
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UPM J1738-4738 | ||||||||
| UPM J1738-4738 b | 0.01 AU | 1.8 M⊕ | 1.1 R⊕ | 0.3 days | |||||
Comparison
When comparing to the Solar system planets, UPM J1738-4738 b has 1.83 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 | 33.27 | 2.25 | 1.83 | 16.64 | 0.01 | 0.02 | 0.13 | 0.11 |
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Size | 2.9 | 1.17 | 1.11 | 2.09 | 0.1 | 0.12 | 0.28 | 0.29 |
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Density | 1.37 | 1.41 | 1.34 | 1.81 | 5.93 | 10.59 | 5.87 | 4.27 |
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Distance | 0.01 | 0.01 | 0.01 | 0 | 0 | 0 | 0 | 0 |
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Temperature | 2.55 | 1.52 | 3.9 | 5.39 | 6.88 | 8.44 | 14.38 | 15.58 |
Habitability
Habitable zone of the star: 0.08 - 0.11 AU
The planet is too hot to sustain liquid water.
The planet has mass comparable to Earth.