The star
The star
Kepler-82
- Type
- G
- Surface
- ≈ 5,428 K
- Size
- 0.94 × the Sun
- Mass
- 0.95 × the Sun
- Brightness
- 0.653 × the Sun
- Habitable zone
- 0.619–1.47 AU
The planets
Kepler-82
Kepler-82 d
- Year
- 2.38 days
- Distance from star
- 0.034 AU
- Mass
- 2.8 Jupiters
- Size
- 1.8 × Earth
- Temperature
- ≈ 1253 K (+980 °C)
- Found
- 2014, transit (Kepler)
Kepler-82
Kepler-82 e
- Year
- 5.90 days
- Distance from star
- 0.063 AU
- Mass
- 2.5e+02 Earths
- Size
- 2.5 × Earth
- Temperature
- ≈ 926 K (+653 °C)
- Found
- 2014, transit (Kepler)
Kepler-82
Kepler-82 b
- Year
- 26.44 days
- Distance from star
- 0.168 AU
- Mass
- 12 Earths
- Size
- 4.1 × Earth
- Temperature
- ≈ 562 K (+289 °C)
- Found
- 2012, transit (Kepler)
Kepler-82
Kepler-82 c
- Year
- 51.54 days
- Distance from star
- 0.263 AU
- Mass
- 14 Earths
- Size
- 5.3 × Earth
- Temperature
- ≈ 450 K (+177 °C)
- Found
- 2012, transit (Kepler)
Kepler-82
Kepler-82 f
- Year
- 75.73 days
- Distance from star
- 0.34 AU
- Mass
- 21 Earths
- Size
- 4.8 × Earth
- Temperature
- ≈ 424 K (+150 °C)
- Found
- 2019, transit timing variations (KOINet)
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.
Early and late
A known planet arrives early or late for its transits, betraying the pull of another, unseen planet.
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.