Exoplanet CatalogExoplanet 55 Cnc B b
Radius1.69 R⊕Earth = 1
Mass3.5 M⊕Earth = 1
Orbital period6.80 d
Equilibrium temp.395 K≈ 122 °C
Distance40.7 ly
Discovered2025Radial Velocity
Size compared (radius, Earth = 1)
1.00
1.69
3.88
11.21
Where it sits among all planets (percentile)
21%
20%
38%
17%
3%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of 55 Cnc B (2)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| 55 Cnc B b | 6.80 | 1.69 | 3.5 | 395 | 2025 |
| 55 Cnc B c | 33.75 | 2.16 | 5.3 | 230 | 2025 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| 55 Cnc B | M4.5 V | 3,286 | 0.27 | 0.26 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.