Exoplanet · Neptune-like planet
Kepler-139 f
Kepler-139 f is a Neptune-like planet orbiting the star Kepler-139. Its year lasts 355 Earth days. It was discovered in 2025 by the Transit Timing Variations method.
| Host star | Kepler-139 |
|---|---|
| Distance | 1,275 light-years (391.0 pc) |
| Orbital period | 355 days |
| Radius | 6.67 R⊕ · 0.595 R♃ |
| Mass | 36 M⊕ · 0.113 M♃ |
| Density | 0.667 g/cm³ |
| Surface gravity | 0.809 × Earth |
| Discovery method | Transit Timing Variations |
| Discovery year | 2025 |
| Discovered by | Multiple Observatories |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.78. Visible from the whole Northern Hemisphere and south to latitude 46° S. North of latitude 46° 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 the year 751. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 23 million years.
Planets in the same system
- Kepler-139 d 7.31-day orbit · 1.7 R⊕
- Kepler-139 b 15.8-day orbit · 2.94 R⊕
- Kepler-139 c 157-day orbit · 3.38 R⊕
- Kepler-139 e 2,050-day orbit · 13.7 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.