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Exoplanet 55 Cancri B c
Exoplanet 55 Cancri B c orbits star 55 Cancri B that lies 41 light years away from the Sun.
It weighs about 5.3 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
41 light years
41 light years
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55 Cancri B c
Exoplanet
Star: 55 Cancri B
Distance from the star: 0.13 AU
Orbit around star: 33.747 days
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Orbital period
Orbital period of exoplanet 55 Cancri B c around its star is 33.747 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: 5.3 M Earth
Exoplanet mass
Exoplanet 55 Cancri B c has 5.3 Earth masses, or 0.36 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: 2025 (radial velocity)Advertisement
55 Cancri system structure
Exoplanet 55 Cancri B c orbits star 55 Cancri B, which has lower mass than Sun. It is one of 2 known exoplanets orbiting this star.
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55 Cancri A | ||||||||
| 55 Cancri A e | 0.02 AU | 8.6 M⊕ | 1.9 R⊕ | 0.7 days | |||||
| 55 Cancri A b | 0.11 AU | 262.3 M⊕ | 14.7 days | ||||||
| 55 Cancri A c | 0.24 AU | 54.3 M⊕ | 44.4 days | ||||||
| 55 Cancri A f | 0.78 AU | 49.3 M⊕ | 260 days | ||||||
| 55 Cancri A d | 5.45 AU | 1227.1 M⊕ | 4867 days | ||||||
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55 Cancri B | ||||||||
| 55 Cancri B b | 0.04 AU | 3.5 M⊕ | 6.8 days | ||||||
| 55 Cancri B c | 0.13 AU | 5.3 M⊕ | 33.7 days | ||||||
Comparison
When comparing to the Solar system planets, 55 Cancri B c has 36 % 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 | 96.36 | 6.5 | 5.3 | 48.18 | 0.02 | 0.06 | 0.36 | 0.31 |
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Distance | 0.33 | 0.18 | 0.13 | 0.09 | 0.02 | 0.01 | 0.01 | 0 |
Habitability
Habitable zone of the star: 0.06 - 0.09 AU
The planet seems to be close to the outer edge of the habitable zone. It is probably very cold, but environment with higher temperatures might be possible.