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Exoplanet TOI 421 A c
Exoplanet TOI 421 A c orbits star TOI 421 A that lies 245 light years away from the Sun.
It weighs about 14.1 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
245 light years
245 light years
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TOI 421 A c
Exoplanet
Star: TOI 421 A
Distance from the star: 0.1170 AU
Orbit around star: 16.06754 days
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Orbital period
Orbital period of exoplanet TOI 421 A c around its star is 16.06754 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: 0.19Basic characteristic
Mass: 14.1 M Earth
Exoplanet mass
Exoplanet TOI 421 A c has 14.1 Earth masses, or 0.97 times the mass of Uranus.
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: 5.09 R Earth | 0.5 R Jupiter
Density: 590 kg/m3 | 10.70 % Earth
Temperature: 635 K | 361.85 °C
Year of discovery: 2020 (transit)
Other designations of this exoplanet
BD-14 1137 c
BD-14 1137 c
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TOI 421 system structure
Exoplanet TOI 421 A c orbits star TOI 421 A, which has lower mass than Sun. It is one of 2 known exoplanets orbiting this star.
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TOI 421 A | ||||||||
| TOI 421 A b | 0.06 AU | 6.7 M⊕ | 2.6 R⊕ | 5.2 days | |||||
| TOI 421 A c | 0.12 AU | 14.1 M⊕ | 5.1 R⊕ | 16.1 days | |||||
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TOI 421 B | 2206 AU | |||||||
Comparison
When comparing to the Solar system planets, TOI 421 A c has 97 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 256.36 | 17.3 | 14.1 | 128.18 | 0.04 | 0.15 | 0.97 | 0.82 |
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Size | 13.29 | 5.36 | 5.09 | 9.6 | 0.45 | 0.56 | 1.27 | 1.34 |
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Density | 0.11 | 0.11 | 0.11 | 0.14 | 0.47 | 0.85 | 0.47 | 0.34 |
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Distance | 0.3 | 0.16 | 0.12 | 0.08 | 0.02 | 0.01 | 0.01 | 0 |
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Temperature | 1.44 | 0.86 | 2.2 | 3.05 | 3.9 | 4.77 | 8.14 | 8.82 |
Habitability
Habitable zone of the star: 0.78 - 1.1 AU
The planet is too hot to sustain liquid water.
The planet is bigger than Earth and smaller than Neptune. Its average density 590 kg/m3 points to a hot gas planet.
News from this star system
19. 05 2025
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