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Eta Cephei
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Eta Cephei b
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Exoplanet Eta Cephei b

(Unconfirmed Exoplanet)
Eta Cephei b is an unconfirmed exoplanet detected around star Eta Cephei. More observations are needed to confirm its existence.
Sun distance
47 light years

iconEta Cephei b

Exoplanet
Star: Eta Cephei
icon distanceDistance from the star: 0.638 AU
icon time Orbit around star: 163.57 days +
Orbital period
Orbital period of exoplanet Eta Cephei b around its star is 163.57 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... icon More about Orbital period in StellarGuide
icon timeEccentricity: 0.17

Basic characteristic

icon weight
Mass: 203.5 M Earth
| 0.6402 M Jupiter
+
Exoplanet mass
Exoplanet Eta Cephei b has 203.5 Earth masses (or 0.6402 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... icon More about Exoplanet mass in StellarGuide
Other designations of this exoplanet
eta Cep b, 3 Cephei b, BD+61 2050 b, FK5 783 b, HD 198149 b, HIP 102422 b, HR 7957 b, SAO 19019 b

Eta Cephei system structure

Exoplanet Eta Cephei b orbits star Eta Cephei, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
 Eta Cephei
Eta Cephei b
unconfirmed
 0.64 AU 203.5 M⊕ 163.6 days

Comparison

When comparing to the Solar system planets, Eta Cephei b has 64 % of mass of Jupiter and it orbits its star a little closer than Venus.
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
icon mass Mass 3699.27249.64203.461849.640.642.1413.9411.83
icon distance Distance1.640.880.640.420.120.070.030.02

Habitability

Habitable zone of the star: 3.6 - 5.2 AU
check icon
The planet is too hot to sustain liquid water.
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