The Kepler-1321 System
Kepler-1321 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 2,509 light-years from Earth.
Size Comparison: The Planets of Kepler-1321
Kepler-1321: Star and Habitable Zone
Kepler-1321
- Surface temperature
- 4,094 K (Sun: 5,772 K)
- Mass
- 0.54 M☉
- Radius
- 0.53 R☉
- Age
- 4.2 billion years (Sun: 4.6)
Habitable zone of Kepler-1321: 0.215–0.543 AU (conservative: 0.273–0.514 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-1321 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-1321 b | Neptune-like | 11 d | 4.92 R⊕ | 0.20 | 2016 |
| Kepler-1321 c | Mini Neptune | 2.2 d | 2.40 R⊕ | 0.24 | 2016 |
| Kepler-1321 d | Mini Neptune | 5.7 d | 2.63 R⊕ | 0.25 | 2021 |
Discovery History
The first planet found here, Kepler-1321 b, was discovered in 2016 using the transit method. The most recent addition, Kepler-1321 d, followed in 2021.
- 2016 — Kepler-1321 b (Transit)
- 2016 — Kepler-1321 c (Transit)
- 2021 — Kepler-1321 d (Transit)
Frequently Asked Questions About Kepler-1321
How many planets does Kepler-1321 have?
Kepler-1321 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-1321 system habitable?
None of the known planets in Kepler-1321 orbit within the star's habitable zone.
How far away is Kepler-1321?
Kepler-1321 is about 2,509 light-years from Earth in the constellation Cygnus.
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