Exoplanet · gas giant
K2-73 c
K2-73 c is a gas giant orbiting the star K2-73. Its year lasts 1,000 Earth days. It was discovered in 2025 by the Radial Velocity method.
| Host star | K2-73 |
|---|---|
| Distance | 878.0 light-years (269.2 pc) |
| Orbital period | 2.74 years |
| Radius | 13 R⊕ · 1.16 R♃ |
| Mass (minimum) | 1,140 M⊕ · 3.59 M♃ |
| Density | 2.86 g/cm³ |
| Equilibrium temperature | 186 K (-87 °C) |
| Stellar flux received | 0.285 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2025 |
| Discovered by | W. M. Keck Observatory |
Habitable zone
Beyond the habitable zone: it receives only %28 of the light the Earth does, a frozen world.
In the sky
A telescope is needed to see it: its apparent magnitude is 11.47. Visible from the whole Southern Hemisphere and north to latitude 81° N. It stands highest at midnight in August, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1148. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
Planets in the same system
- K2-73 b 7.5-day orbit · 2.58 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.