The star
The star
Kepler-328
- Type
- white star
- Surface
- ≈ 6,064 K
- Size
- 1.06 × the Sun
- Mass
- 1.15 × the Sun
- Brightness
- 2.76 × the Sun
- Habitable zone
- 1.22–2.86 AU
The planets
Kepler-328
Kepler-328 b
- Year
- 34.92 days
- Distance from star
- 0.22 AU
- Mass
- 28 Earths
- Size
- 2.3 × Earth
- Temperature
- ≈ 602 K (+329 °C)
- Found
- 2013, transit (Kepler)
Kepler-328
Kepler-328 c
- Year
- 71.31 days
- Distance from star
- 0.354 AU
- Mass
- 39 Earths
- Size
- 5.4 × Earth
- Temperature
- ≈ 475 K (+202 °C)
- Found
- 2013, 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.