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Exoplanet Struve 2398 A b
(Unconfirmed Exoplanet)
Struve 2398 A b is an unconfirmed exoplanet detected around star Struve 2398 A. More observations are needed to confirm its existence.
Sun distance
11 light years
11 light years
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Struve 2398 A b
Exoplanet
Star: Struve 2398 A
Distance from the star: 0.068 AU
Orbit around star: 11.2201 days
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Orbital period
Orbital period of exoplanet Struve 2398 A b around its star is 11.2201 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: 2.78 M Earth
Exoplanet mass
Exoplanet Struve 2398 A b has 2.78 Earth masses, or 0.19 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
Year of discovery: 2024 (radial velocity)
Other designations of this exoplanet
Gliese 725 b, G 227-046 b, HD 173739 b, HIP 91768 b, LHS 58 b, Vyssotsky 184 b, ADS 11632 b, BD +59°1915 b, GCTP 4330.00 A/B b
Gliese 725 b, G 227-046 b, HD 173739 b, HIP 91768 b, LHS 58 b, Vyssotsky 184 b, ADS 11632 b, BD +59°1915 b, GCTP 4330.00 A/B b
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Struve 2398 system structure
Exoplanet Struve 2398 A b orbits star Struve 2398 A, which has lower mass than Sun. It is the only known exoplanet orbiting this star
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Struve 2398 A | ||||||||
| Struve 2398 A b unconfirmed |
0.07 AU | 2.8 M⊕ | 11.2 days | ||||||
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Struve 2398 B | 63 AU | |||||||
| Struve 2398 B b unconfirmed |
0.04 AU | 1.5 M⊕ | 4.8 days | ||||||
| Struve 2398 B c | 0.14 AU (HZ) | 3.5 M⊕ | 37.9 days | ||||||
Comparison
When comparing to the Solar system planets, Struve 2398 A b has 19 % 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 | 50.55 | 3.41 | 2.78 | 25.27 | 0.01 | 0.03 | 0.19 | 0.16 |
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Distance | 0.17 | 0.09 | 0.07 | 0.04 | 0.01 | 0.01 | 0 | 0 |
Habitability
Habitable zone of the star: 0.12 - 0.18 AU
The planet's orbit is close to hotter edge of the habitable zone of its star.
The planet has mass comparable to Earth.
News from this star system
04. 02 2026
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