Exoplanet · gas giant
KOI-884 e
KOI-884 e is a gas giant orbiting the star Kepler-247. Its year lasts 31.1 Earth days. It was discovered in 2014 by the Transit Timing Variations method.
| Host star | Kepler-247 |
|---|---|
| Distance | 2,165 light-years (663.7 pc) |
| Orbital period | 31.1 days |
| Eccentricity | 0.042 |
| Radius | 9.54 R⊕ · 0.851 R♃ |
| Mass | 66.1 M⊕ · 0.208 M♃ |
| Density | 0.418 g/cm³ |
| Surface gravity | 0.726 × Earth |
| Discovery method | Transit Timing Variations |
| Discovery year | 2014 |
| Discovered by | Kepler |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.20. Visible from the whole Northern Hemisphere and south to latitude 47° S. North of latitude 47° 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 140 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 38 million years.
Planets in the same system
- Kepler-247 b 3.34-day orbit · 1.64 R⊕
- Kepler-247 c 9.44-day orbit · 4.09 R⊕
- Kepler-247 d 20.5-day orbit · 4.5 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.