Kepler-122 f
Kepler-122 f is a super-Earth orbiting Kepler-122 in the constellation Lyra. It lies about 3,351 light-years from Earth and was discovered in 2014 using the transit timing variations method.
How Big Is Kepler-122 f?
Kepler-122 f has a radius of 1.75 times that of Earth. Its mass is 36.0 times that of Earth.
Is Kepler-122 f in the Habitable Zone?
The position of Kepler-122 f relative to the habitable zone of Kepler-122 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-122: 0.984–2.303 AU (conservative: 1.246–2.184 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on Kepler-122 f — one full orbit around Kepler-122 — lasts 56.3 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-122 f Discovered?
Kepler-122 f was discovered in 2014 using the transit timing variations method, with observations from Kepler.
Transit timing variations reveal a planet through its gravitational tug on a sibling planet, which makes that sibling's transits arrive slightly early or late. The pattern of these deviations betrays the hidden planet's mass and orbit.
How Far Away Is Kepler-122 f?
Kepler-122 f is 3,351.1 light-years (1,027.5 parsecs) from Earth. Light arriving here tonight left the planet about 3,351 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 58,979,360 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. Kepler-122 f scores 0.32, ranking #971 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-122
Kepler-122
- Surface temperature
- 6,050 K (Sun: 5,772 K)
- Radius
- 1.22 R☉
The Kepler-122 Planetary System
Kepler-122 f is one of 5 known planets in the Kepler-122 system. Its siblings:
- Kepler-122 b (Mini Neptune)
- Kepler-122 c (Neptune-like)
- Kepler-122 d (Mini Neptune)
- Kepler-122 e (Mini Neptune)
Kepler-122 f — Complete Data
| Radius | 1.750 Earth radii (0.156 Jupiter radii) |
|---|---|
| Mass | 36.00 Earth masses (0.113 Jupiter masses) |
| Orbital period | 56.27 days |
| Earth Similarity Index | 0.32 |
| Distance from Earth | 3,351.1 light-years (1,027.5 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit Timing Variations |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-05-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-122 f
Is Kepler-122 f habitable?
Kepler-122 f is not known to orbit within the habitable zone of Kepler-122, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-122 f?
Kepler-122 f is about 3,351 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 58,979,360 years to get there.
How big is Kepler-122 f compared to Earth?
Kepler-122 f has 1.75 times the radius of Earth and about 36.0 times its mass.
How long is a year on Kepler-122 f?
One orbit around Kepler-122 takes 56.3 Earth days.
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