The Kepler-281 System
Kepler-281 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 5,693 light-years from Earth.
Size Comparison: The Planets of Kepler-281
Kepler-281: Star and Habitable Zone
Kepler-281
- Surface temperature
- 5,723 K (Sun: 5,772 K)
- Radius
- 0.90 R☉
Habitable zone of Kepler-281: 0.664–1.567 AU (conservative: 0.841–1.486 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 3 Planets in the Kepler-281 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-281 b | Mini Neptune | 15 d | 2.82 R⊕ | 0.23 | 2014 |
| Kepler-281 c | Neptune-like | 36 d | 5.31 R⊕ | 0.18 | 2014 |
| Kepler-281 d | Neptune-like | 148 d | 5.94 R⊕ | 0.32 | 2021 |
Discovery History
The first planet found here, Kepler-281 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-281 d, followed in 2021.
- 2014 — Kepler-281 b (Transit)
- 2014 — Kepler-281 c (Transit)
- 2021 — Kepler-281 d (Transit)
Frequently Asked Questions About Kepler-281
How many planets does Kepler-281 have?
Kepler-281 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-281 system habitable?
None of the known planets in Kepler-281 orbit within the star's habitable zone.
How far away is Kepler-281?
Kepler-281 is about 5,693 light-years from Earth in the constellation Cygnus.
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