The star
The star
Kepler-296
- Type
- M2 V
- Surface
- ≈ 3,740 K
- Size
- 0.48 × the Sun
- Mass
- 0.50 × the Sun
- Brightness
- 0.031 × the Sun
- Habitable zone
- 0.144–0.368 AU
The planets
Kepler-296
Kepler-296 c
- Year
- 5.84 days
- Distance from star
- 0.0521 AU
- Mass
- 4.7 Earths
- Size
- 2 × Earth
- Temperature
- ≈ 606 K (+333 °C)
- Found
- 2014, transit (Kepler)
Kepler-296
Kepler-296 b
- Year
- 10.86 days
- Distance from star
- 0.079 AU
- Mass
- 3.2 Earths
- Size
- 1.6 × Earth
- Temperature
- ≈ 495 K (+222 °C)
- Found
- 2014, transit (Kepler)
Kepler-296
Kepler-296 d
- Year
- 19.85 days
- Distance from star
- 0.118 AU
- Mass
- 5 Earths
- Size
- 2.1 × Earth
- Temperature
- ≈ 403 K (+130 °C)
- Found
- 2014, transit (Kepler)
Kepler-296
Kepler-296 e
- Year
- 34.14 days
- Distance from star
- 0.169 AU
- Mass
- 3 Earths
- Size
- 1.5 × Earth
- Temperature
- ≈ 337 K (+64 °C)
- Found
- 2014, transit (Kepler)
Kepler-296
Kepler-296 f
- Year
- 63.34 days
- Distance from star
- 0.255 AU
- Mass
- 3.9 Earths
- Size
- 1.8 × Earth
- Temperature
- ≈ 274 K (+1 °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.