Exoplanet · gas giant
HD 5891 b
HD 5891 b is a gas giant orbiting the star HD 5891. Its year lasts 177 Earth days. It was discovered in 2011 by the Radial Velocity method.
| Host star | HD 5891 |
|---|---|
| Distance | 924.7 light-years (283.5 pc) |
| Orbital period | 177 days |
| Orbital radius | 0.64 AU |
| Eccentricity | 0.070 |
| Radius | 12.6 R⊕ · 1.12 R♃ |
| Mass (minimum) | 2,430 M⊕ · 7.63 M♃ |
| Density | 6.66 g/cm³ |
| Equilibrium temperature | 919 K (646 °C) |
| Stellar flux received | 96.2 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2011 |
| Discovered by | W. M. Keck Observatory |
Habitable zone
Inside the inner edge of the habitable zone: it receives 96.2 times the light the Earth does, too hot to keep liquid water on its surface.
Its star in the sky
In the planet's sky its star is a disc 8.8° across: 17 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 8.09); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° N it never sets. It stands highest at midnight in October, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1101. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.