The star
The star
Kepler-154
- Type
- yellow star
- Surface
- ≈ 5,769 K
- Size
- 0.98 × the Sun
- Mass
- 0.98 × the Sun
- Brightness
- 1.08 × the Sun
- Habitable zone
- 0.78–1.84 AU
The planets
Kepler-154
Kepler-154 e
- Year
- 3.93 days
- Distance from star
- 0.0477 AU
- Mass
- 2.9 Earths
- Size
- 1.5 × Earth
- Temperature
- ≈ 1140 K (+867 °C)
- Found
- 2016, transit (Kepler)
Kepler-154
Kepler-154 f
- Year
- 9.92 days
- Distance from star
- 0.0883 AU
- Mass
- 2.9 Earths
- Size
- 1.5 × Earth
- Temperature
- ≈ 838 K (+565 °C)
- Found
- 2016, transit (Kepler)
Kepler-154
Kepler-154 d
- Year
- 20.55 days
- Distance from star
- 0.144 AU
- Mass
- 14 Earths
- Size
- 3.8 × Earth
- Temperature
- ≈ 657 K (+384 °C)
- Found
- 2016, transit (Kepler)
Kepler-154
Kepler-154 b
- Year
- 33.04 days
- Distance from star
- 0.198 AU
- Mass
- 5.7 Earths
- Size
- 2.3 × Earth
- Temperature
- ≈ 561 K (+288 °C)
- Found
- 2014, transit (Kepler)
Kepler-154
Kepler-154 c
- Year
- 62.30 days
- Distance from star
- 0.303 AU
- Mass
- 9 Earths
- Size
- 3 × Earth
- Temperature
- ≈ 454 K (+181 °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.