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Exoplanet KELT-18 A b
Exoplanet KELT-18 A b orbits star KELT-18 A that lies 1032 light years away from the Sun.
It weighs about 375.13 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
1032 light years
1032 light years
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KELT-18 A b
Exoplanet, gas giant
Star: KELT-18 A
Distance from the star: 0.0455 AU
Orbit around star: 2.871698 days
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Orbital period
Orbital period of exoplanet KELT-18 A b around its star is 2.871698 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: 375.13 M Earth
| 1.1804 M Jupiter
Exoplanet mass
Exoplanet KELT-18 A b has 375.13 Earth masses (or 1.1804 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
Size: 17.598 R Earth | 1.6 R Jupiter
Density: 380 kg/m3 | 6.89 % Earth
Temperature: 2120 K | 1846.85 °C
Year of discovery: 2017 (transit)Advertisement
KELT-18 system structure
Exoplanet KELT-18 A b orbits star KELT-18 A, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
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KELT-18 A | ||||||||
| KELT-18 A b | 0.05 AU | 375.1 M⊕ | 17.6 R⊕ | 2.9 days | |||||
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KELT-18 B | 1082 AU | |||||||
Comparison
When comparing to the Solar system planets, KELT-18 A b has 1.18 times the mass of Jupiter and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 6820.55 | 460.28 | 375.13 | 3410.27 | 1.18 | 3.94 | 25.69 | 21.81 |
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Size | 45.96 | 18.52 | 17.6 | 33.2 | 1.57 | 1.93 | 4.4 | 4.63 |
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Density | 0.07 | 0.07 | 0.07 | 0.09 | 0.31 | 0.55 | 0.3 | 0.22 |
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Distance | 0.12 | 0.06 | 0.05 | 0.03 | 0.01 | 0 | 0 | 0 |
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Temperature | 4.82 | 2.88 | 7.36 | 10.19 | 13.01 | 15.94 | 27.18 | 29.44 |
Habitability
Habitable zone of the star: 2.2 - 3.2 AU
The planet orbits too close to its star and is exposed to extreme temperatures and radiation prohibiting life as we know it.