The star
The star
Kepler-84
- Type
- white star
- Surface
- ≈ 6,031 K
- Size
- 1.17 × the Sun
- Mass
- 1.06 × the Sun
- Brightness
- 1.63 × the Sun
- Habitable zone
- 0.943–2.21 AU
The planets
Kepler-84
Kepler-84 d
- Year
- 4.22 days
- Distance from star
- 0.052 AU
- Mass
- 2.5 Earths
- Size
- 1.4 × Earth
- Temperature
- ≈ 1254 K (+981 °C)
- Found
- 2014, transit (Kepler)
Kepler-84
Kepler-84 b
- Year
- 8.73 days
- Distance from star
- 0.0827 AU
- Mass
- 40 Earths
- Size
- 2.2 × Earth
- Temperature
- ≈ 985 K (+712 °C)
- Found
- 2012, transit (Kepler)
Kepler-84
Kepler-84 c
- Year
- 12.88 days
- Distance from star
- 0.107 AU
- Mass
- 20 Earths
- Size
- 2.4 × Earth
- Temperature
- ≈ 865 K (+592 °C)
- Found
- 2012, transit (Kepler)
Kepler-84
Kepler-84 e
- Year
- 27.43 days
- Distance from star
- 0.181 AU
- Mass
- 7.3 Earths
- Size
- 2.6 × Earth
- Temperature
- ≈ 672 K (+399 °C)
- Found
- 2014, transit (Kepler)
Kepler-84
Kepler-84 f
- Year
- 44.55 days
- Distance from star
- 0.25 AU
- Mass
- 5.5 Earths
- Size
- 2.2 × Earth
- Temperature
- ≈ 572 K (+299 °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.