Exoplanet · gas giant
HIP 5158 b
HIP 5158 b is a gas giant orbiting the star HIP 5158. Its year lasts 346 Earth days. It was discovered in 2009 by the Radial Velocity method.
| Host star | HIP 5158 |
|---|---|
| Distance | 168.3 light-years (51.6 pc) |
| Orbital period | 346 days |
| Orbital radius | 0.89 AU |
| Eccentricity | 0.520 |
| Radius | 13.6 R⊕ · 1.21 R♃ |
| Mass (minimum) | 451 M⊕ · 1.42 M♃ |
| Density | 0.985 g/cm³ |
| Equilibrium temperature | 220 K (-53 °C) |
| Stellar flux received | 0.139 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2009 |
| Discovered by | La Silla Observatory |
Habitable zone
Beyond the habitable zone: it receives only %14 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.45° across: 0.84 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 10.16. Visible from the whole Southern Hemisphere and north to latitude 68° N. South of latitude 68° S 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 1858. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.0 million years.
Planets in the same system
- HIP 5158 c 9,020-day orbit · 12.2 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.