The star
The star
Kepler-147
- Type
- white star
- Surface
- ≈ 6,012 K
- Size
- 1.47 × the Sun
- Mass
- 1.15 × the Sun
- Brightness
- 2.68 × the Sun
- Habitable zone
- 1.21–2.83 AU
The planets
Kepler-147
Kepler-147 b
- Year
- 12.61 days
- Distance from star
- 0.113 AU
- Mass
- 3 Earths
- Size
- 1.5 × Earth
- Temperature
- ≈ 953 K (+680 °C)
- Found
- 2014, transit (Kepler)
Kepler-147
Kepler-147 c
- Year
- 33.42 days
- Distance from star
- 0.216 AU
- Mass
- 6.5 Earths
- Size
- 2.4 × Earth
- Temperature
- ≈ 689 K (+416 °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.