The Kepler-139 System
5 planets
Lyra
Kepler-139 is a planetary system in the constellation Lyra hosting 5 confirmed exoplanets, about 1,275 light-years from Earth.
Size Comparison: The Planets of Kepler-139
Planets without a measured radius are not shown.
Kepler-139: Star and Habitable Zone
Kepler-139
- Mass
- 1.08 M☉
All 5 Planets in the Kepler-139 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-139 b | Mini Neptune | 16 d | 2.94 R⊕ | 0.23 | 2014 |
| Kepler-139 c | Sub Neptune | 157 d | 3.38 R⊕ | 0.48 | 2014 |
| Kepler-139 d | Super Earth | 7.3 d | 1.70 R⊕ | 0.28 | 2023 |
| Kepler-139 e | Cold Gas Giant | 2,048 d | — | 0.16 | 2023 |
| Kepler-139 f | Neptune-like | 355 d | — | — | 2025 |
Discovery History
The first planet found here, Kepler-139 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-139 f, followed in 2025.
- 2014 — Kepler-139 b (Transit)
- 2014 — Kepler-139 c (Transit)
- 2023 — Kepler-139 d (Transit)
- 2023 — Kepler-139 e (Radial Velocity)
- 2025 — Kepler-139 f (Transit Timing Variations)
Frequently Asked Questions About Kepler-139
How many planets does Kepler-139 have?
Kepler-139 has 5 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-139 system habitable?
None of the known planets in Kepler-139 orbit within the star's habitable zone.
How far away is Kepler-139?
Kepler-139 is about 1,275 light-years from Earth in the constellation Lyra.
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