Exoplanet · gas giant
HD 4208 b
HD 4208 b is a gas giant orbiting the star Cocibolca. Its year lasts 833 Earth days. It was discovered in 2001 by the Radial Velocity method.
| Host star | Cocibolca |
|---|---|
| Distance | 111.5 light-years (34.2 pc) |
| Orbital period | 2.28 years |
| Orbital radius | 1.66 AU |
| Eccentricity | 0.042 |
| Radius | 13.9 R⊕ · 1.24 R♃ |
| Mass (minimum) | 257 M⊕ · 0.81 M♃ |
| Density | 0.527 g/cm³ |
| Equilibrium temperature | 197 K (-76 °C) |
| Stellar flux received | 0.288 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2001 |
| Discovered by | W. M. Keck Observatory |
Habitable zone
Beyond the habitable zone: it receives only %29 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.27° across: 0.51 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 7.78); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 63° N. South of latitude 63° S it never sets. It stands highest at midnight in September, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1914. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.0 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.