The star
The star
Kepler-271
- Type
- yellow star
- Surface
- ≈ 5,555 K
- Size
- 0.87 × the Sun
- Mass
- 0.90 × the Sun
- Brightness
- 0.558 × the Sun
- Habitable zone
- 0.568–1.35 AU
The planets
Kepler-271
Kepler-271 d
- Year
- 5.25 days
- Distance from star
- 0.0555 AU
- Mass
- 0.22 Earths
- Size
- 0.66 × Earth
- Temperature
- ≈ 954 K (+681 °C)
- Found
- 2016, transit (Kepler)
Kepler-271
Kepler-271 c
- Year
- 7.41 days
- Distance from star
- 0.0699 AU
- Mass
- 0.81 Earths
- Size
- 0.95 × Earth
- Temperature
- ≈ 850 K (+577 °C)
- Found
- 2014, transit (Kepler)
Kepler-271
Kepler-271 b
- Year
- 10.44 days
- Distance from star
- 0.0878 AU
- Mass
- 2 Earths
- Size
- 1.2 × Earth
- Temperature
- ≈ 759 K (+486 °C)
- Found
- 2014, transit (Kepler)
Masses found by the wobble method are minimums, because the orbit's tilt is unknown. Temperatures are equilibrium estimates for a bare planet, before any atmosphere.
How we know
The shadow
The planet passes in front of its star and dims it by a fraction of a percent, every orbit. The dip gives the planet's size and year.
Sources
- Planet and star parameters: NASA Exoplanet Archive, Planetary Systems Composite Parameters, retrieved 1 Nov 2026. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.
- Position: HYG Database v4.1 (CC BY-SA 4.0).
- Habitable zone: a simple estimate from the star's brightness (√L × 0.95 to 1.67 AU), shown as a guide.