The Kepler-122 System
Kepler-122 is a planetary system in the constellation Lyra hosting 5 confirmed exoplanets, about 3,351 light-years from Earth.
Size Comparison: The Planets of Kepler-122
Kepler-122: Star and Habitable Zone
Kepler-122
- Surface temperature
- 6,050 K (Sun: 5,772 K)
- Radius
- 1.22 R☉
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 ›
All 5 Planets in the Kepler-122 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-122 b | Mini Neptune | 5.8 d | 2.34 R⊕ | 0.24 | 2014 |
| Kepler-122 c | Neptune-like | 12 d | 5.87 R⊕ | 0.14 | 2014 |
| Kepler-122 d | Mini Neptune | 22 d | 2.20 R⊕ | 0.26 | 2014 |
| Kepler-122 e | Mini Neptune | 38 d | 2.60 R⊕ | 0.26 | 2014 |
| Kepler-122 f | Super Earth | 56 d | 1.75 R⊕ | 0.32 | 2014 |
Discovery History
The first planet found here, Kepler-122 b, was discovered in 2014 using the transit method.
- 2014 — Kepler-122 b (Transit)
- 2014 — Kepler-122 c (Transit)
- 2014 — Kepler-122 d (Transit)
- 2014 — Kepler-122 e (Transit)
- 2014 — Kepler-122 f (Transit Timing Variations)
Frequently Asked Questions About Kepler-122
How many planets does Kepler-122 have?
Kepler-122 has 5 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-122 system habitable?
None of the known planets in Kepler-122 orbit within the star's habitable zone.
How far away is Kepler-122?
Kepler-122 is about 3,351 light-years from Earth in the constellation Lyra.
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