The star
The star
KOI-1599
- Type
- yellow star
- Surface
- ≈ 5,833 K
- Size
- 0.97 × the Sun
- Mass
- 1.02 × the Sun
- Brightness
- 1.45 × the Sun
- Habitable zone
- 0.901–2.12 AU
The planets
KOI-1599
KOI-1599.02
- Year
- 13.61 days
- Distance from star
- 0.112 AU
- Mass
- 9 Earths
- Size
- 1.9 × Earth
- Temperature
- ≈ 755 K (+482 °C)
- Found
- 2019, transit (Kepler)
KOI-1599
KOI-1599.01
- Year
- 20.44 days
- Distance from star
- 0.147 AU
- Mass
- 4.6 Earths
- Size
- 1.9 × Earth
- Temperature
- ≈ 660 K (+387 °C)
- Found
- 2019, 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.