The Kepler-289 System
Kepler-289 is a planetary system in the constellation Cygnus hosting 4 confirmed exoplanets, about 2,298 light-years from Earth.
Size Comparison: The Planets of Kepler-289
Planets without a measured radius are not shown.
Kepler-289: Star and Habitable Zone
Kepler-289
- Surface temperature
- 5,990 K (Sun: 5,772 K)
- Mass
- 1.08 M☉
- Radius
- 1.00 R☉
- Luminosity
- 1.1508 L☉
- Age
- 0.7 billion years (Sun: 4.6)
Habitable zone of Kepler-289: 0.795–1.863 AU (conservative: 1.007–1.766 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 4 Planets in the Kepler-289 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-289 b | Puffy Planet | 35 d | 2.49 R⊕ | 0.30 | 2014 |
| Kepler-289 c | Cold Gas Giant | 126 d | 11.23 R⊕ | 0.26 | 2014 |
| Kepler-289 d | Puffy Planet | 66 d | 3.03 R⊕ | 0.33 | 2014 |
| Kepler-289 e | Neptune-like | 330 d | — | — | 2025 |
Discovery History
The first planet found here, Kepler-289 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-289 e, followed in 2025.
- 2014 — Kepler-289 b (Transit)
- 2014 — Kepler-289 c (Transit)
- 2014 — Kepler-289 d (Transit)
- 2025 — Kepler-289 e (Transit)
Frequently Asked Questions About Kepler-289
How many planets does Kepler-289 have?
Kepler-289 has 4 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-289 system habitable?
None of the known planets in Kepler-289 orbit within the star's habitable zone.
How far away is Kepler-289?
Kepler-289 is about 2,298 light-years from Earth in the constellation Cygnus.
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