The Kepler-1991 System
Kepler-1991 is a planetary system in the constellation Lyra hosting 2 confirmed exoplanets, about 2,791 light-years from Earth.
Size Comparison: The Planets of Kepler-1991
Kepler-1991: Star and Habitable Zone
Kepler-1991
- Surface temperature
- 5,478 K (Sun: 5,772 K)
- Mass
- 0.91 M☉
- Radius
- 1.05 R☉
Habitable zone of Kepler-1991: 0.723–1.718 AU (conservative: 0.916–1.629 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 2 Planets in the Kepler-1991 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-1991 b | Super Earth | 13 d | 1.47 R⊕ | 0.30 | 2023 |
| Kepler-1991 c | Mini Neptune | 23 d | 2.57 R⊕ | 0.26 | 2023 |
Discovery History
The first planet found here, Kepler-1991 b, was discovered in 2023 using the transit method.
- 2023 — Kepler-1991 b (Transit)
- 2023 — Kepler-1991 c (Transit)
Frequently Asked Questions About Kepler-1991
How many planets does Kepler-1991 have?
Kepler-1991 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-1991 system habitable?
None of the known planets in Kepler-1991 orbit within the star's habitable zone.
How far away is Kepler-1991?
Kepler-1991 is about 2,791 light-years from Earth in the constellation Lyra.
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