Exoplanet · Earth-sized rocky planet
KOI-4978 b
KOI-4978 b is a Earth-sized rocky planet orbiting the star KOI-4978. Its year lasts 0.942 Earth days. It was discovered in 2024 by the Transit method.
| Host star | KOI-4978 |
|---|---|
| Distance | 3,054 light-years (936.3 pc) |
| Orbital period | 22.6 hours |
| Radius | 0.7 R⊕ · 0.0624 R♃ |
| Mass | 0.271 M⊕ · 8.53 × 10⁻⁴ M♃ (estimated from the radius) |
| Density | 4.34 g/cm³ |
| Discovery method | Transit |
| Discovery year | 2024 |
| Discovered by | Kepler |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.63. Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° N it never sets. It stands highest at midnight in July, the best time to observe it.
Light's journey
The light you see tonight set out around 1029 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 54 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.