The star
The star
Kepler-354
- Type
- orange dwarf
- Surface
- ≈ 4,648 K
- Size
- 0.67 × the Sun
- Mass
- 0.65 × the Sun
- Brightness
- 0.193 × the Sun
- Habitable zone
- 0.35–0.858 AU
The planets
Kepler-354
Kepler-354 b
- Year
- 5.48 days
- Distance from star
- 0.054 AU
- Mass
- 4 Earths
- Size
- 1.8 × Earth
- Temperature
- ≈ 741 K (+468 °C)
- Found
- 2014, transit (Kepler)
Kepler-354
Kepler-354 c
- Year
- 16.93 days
- Distance from star
- 0.115 AU
- Mass
- 2.3 Earths
- Size
- 1.3 × Earth
- Temperature
- ≈ 508 K (+235 °C)
- Found
- 2014, transit (Kepler)
Kepler-354
Kepler-354 d
- Year
- 24.21 days
- Distance from star
- 0.146 AU
- Mass
- 2.1 Earths
- Size
- 1.2 × Earth
- Temperature
- ≈ 451 K (+178 °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.