Exoplanet · gas giant
WASP-157 b
WASP-157 b is a gas giant orbiting the star WASP-157. Its year lasts 3.95 Earth days. It was discovered in 2016 by the Transit method.
| Host star | WASP-157 |
|---|---|
| Distance | 1,089 light-years (334.0 pc) |
| Orbital period | 3.95 days |
| Orbital radius | 0.0499 AU |
| Eccentricity | 0.000 |
| Radius | 11.2 R⊕ · 0.998 R♃ |
| Mass | 182 M⊕ · 0.574 M♃ |
| Density | 0.64 g/cm³ |
| Surface gravity | 1.46 × Earth |
| Equilibrium temperature | 1,193 K (920 °C) |
| Stellar flux received | 482 × Earth |
| Discovery method | Transit |
| Discovery year | 2016 |
| Discovered by | SuperWASP |
Habitable zone
Inside the inner edge of the habitable zone: it receives 482 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 12° across: 22 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 12.92. Visible from the whole Southern Hemisphere and north to latitude 82° N. It stands highest at midnight in April, the best time to observe it.
Light's journey
The light you see tonight set out around the year 937. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 19 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.