Exoplanet · gas giant
XO-2 S d
XO-2 S d is a gas giant orbiting the star XO-2 S. Its year lasts 4,700 Earth days. It was discovered in 2024 by the Radial Velocity method.
| Host star | XO-2 S |
|---|---|
| Distance | 493.8 light-years (151.4 pc) |
| Orbital period | 12.9 years |
| Orbital radius | 5.46 AU |
| Eccentricity | 0.091 |
| Radius | 13 R⊕ · 1.16 R♃ |
| Mass (minimum) | 1,180 M⊕ · 3.71 M♃ |
| Density | 2.95 g/cm³ |
| Equilibrium temperature | 111 K (-162 °C) |
| Stellar flux received | 0.0253 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2024 |
| Discovered by | Multiple Observatories |
Habitable zone
Beyond the habitable zone: it receives only %2.5 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.1° across: 0.19 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 11.29. Visible from the whole Northern Hemisphere and south to latitude 40° S. North of latitude 40° N 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 1532. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 8.8 million years.
Planets in the same system
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.