Exoplanet · gas giant
51 Eri b
51 Eri b is a gas giant orbiting the star 51 Eri. Its year lasts 9,100 Earth days. It was discovered in 2015 by the Imaging method.
| Host star | 51 Eri |
|---|---|
| Distance | 97.1 light-years (29.8 pc) |
| Orbital period | 24.9 years |
| Orbital radius | 10.4 AU |
| Eccentricity | 0.570 |
| Mass | 3,460 M⊕ · 10.9 M♃ |
| Equilibrium temperature | 807 K (534 °C) |
| Stellar flux received | 0.0529 × Earth |
| Discovery method | Imaging |
| Discovery year | 2015 |
| Discovered by | Gemini Observatory |
Habitable zone
Beyond the habitable zone: it receives only %5.3 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.074° across: 0.14 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.22). Visible from the whole Southern Hemisphere and north to latitude 88° N. It stands highest at midnight in November, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1929. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.