Exoplanet · gas giant
WISEP J121756.91+162640.2 A b
WISEP J121756.91+162640.2 A b is a gas giant orbiting the star WISEP J121756.91+162640.2 A. It was discovered in 2012 by the Imaging method.
| Host star | WISEP J121756.91+162640.2 A |
|---|---|
| Distance | 32.9 light-years (10.1 pc) |
| Orbital radius | 8 AU |
| Radius | 10.5 R⊕ · 0.934 R♃ |
| Mass | 6,990 M⊕ · 22 M♃ |
| Density | 33.5 g/cm³ |
| Surface gravity | 63.8 × Earth |
| Equilibrium temperature | 450 K (177 °C) |
| Stellar flux received | 0 × Earth |
| Discovery method | Imaging |
| Discovery year | 2012 |
| Discovered by | W. M. Keck Observatory |
Habitable zone
Beyond the habitable zone: it receives only %0 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.0061° across: 0.011 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 26.84. Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in March, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1993. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 584 thousand years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.