Exoplanet · gas giant
WISPIT 1 b
WISPIT 1 b is a gas giant orbiting the star WISPIT 1. It was discovered in 2025 by the Imaging method.
| Host star | WISPIT 1 |
|---|---|
| Distance | 750.2 light-years (230.0 pc) |
| Orbital radius | 338 AU |
| Radius | 12.4 R⊕ · 1.11 R♃ |
| Mass | 3,310 M⊕ · 10.4 M♃ |
| Density | 9.53 g/cm³ |
| Surface gravity | 21.5 × Earth |
| Equilibrium temperature | 13 K (-260 °C) |
| Stellar flux received | 0 × Earth |
| Discovery method | Imaging |
| Discovery year | 2025 |
| Discovered by | Paranal 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 0.0018° across: 0.0033 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 13.18. Visible from the whole Southern Hemisphere and north to latitude 40° N. South of latitude 40° S it never sets. It stands highest at midnight in January, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1276. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 13 million years.
Planets in the same system
- WISPIT 1 c 12.8 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.