Kepler-24 b
Kepler-24 b is a super-Earth orbiting Kepler-24 in the constellation Lyra. It lies about 3,773 light-years from Earth and was discovered in 2011 using the transit method.
How Big Is Kepler-24 b?
Kepler-24 b has a radius of 2.35 times that of Earth. Its mass is 11.1 times that of Earth, giving it a density of 4.69 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is Kepler-24 b in the Habitable Zone?
The position of Kepler-24 b relative to the habitable zone of Kepler-24 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-24: 0.884–2.070 AU (conservative: 1.120–1.963 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on Kepler-24 b — one full orbit around Kepler-24 — lasts 8.14 Earth days, shorter than Mercury's 88-day year. Its orbit is nearly circular (eccentricity 0.023).
How Was Kepler-24 b Discovered?
Kepler-24 b was discovered in 2011 using the transit method, with observations from Kepler.
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is Kepler-24 b?
Kepler-24 b is 3,773.0 light-years (1,156.8 parsecs) from Earth. Light arriving here tonight left the planet about 3,773 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 66,404,800 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. Kepler-24 b scores 0.24, ranking #3,264 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-24
Kepler-24
- Surface temperature
- 6,028 K (Sun: 5,772 K)
- Mass
- 1.06 M☉
- Radius
- 1.10 R☉
The Kepler-24 Planetary System
Kepler-24 b is one of 4 known planets in the Kepler-24 system. Its siblings:
- Kepler-24 c (Super Earth)
- Kepler-24 d (Super Earth)
- Kepler-24 e (Mini Neptune)
Kepler-24 b — Complete Data
| Radius | 2.348 Earth radii (0.209 Jupiter radii) |
|---|---|
| Mass | 11.14 Earth masses (0.035 Jupiter masses) |
| Density | 4.69 g/cm³ (Earth: 5.51) |
| Orbital period | 8.14 days |
| Eccentricity | 0.023 |
| Earth Similarity Index | 0.24 |
| Distance from Earth | 3,773.0 light-years (1,156.8 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2011 |
Data: NASA Exoplanet Archive, last updated 2024-06-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-24 b
Is Kepler-24 b habitable?
Kepler-24 b is not known to orbit within the habitable zone of Kepler-24, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-24 b?
Kepler-24 b is about 3,773 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 66,404,800 years to get there.
How big is Kepler-24 b compared to Earth?
Kepler-24 b has 2.35 times the radius of Earth and about 11.1 times its mass.
How long is a year on Kepler-24 b?
One orbit around Kepler-24 takes 8.1 Earth days — short enough that 45 of its years would fit into one Earth year.
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