Kepler-105 b
Kepler-105 b is a super-Earth orbiting Kepler-105 in the constellation Lyra. It lies about 1,498 light-years from Earth and was discovered in 2013 using the transit method.
How Big Is Kepler-105 b?
Kepler-105 b has a radius of 2.53 times that of Earth. Its mass is 10.8 times that of Earth, giving it a density of 3.68 g/cm³ — between that of rocky and gaseous planets.
Is Kepler-105 b in the Habitable Zone?
The position of Kepler-105 b relative to the habitable zone of Kepler-105 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-105: 0.804–1.887 AU (conservative: 1.019–1.789 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-105 b — one full orbit around Kepler-105 — lasts 5.41 Earth days, shorter than Mercury's 88-day year. Its orbit is nearly circular (eccentricity 0.020).
How Was Kepler-105 b Discovered?
Kepler-105 b was discovered in 2013 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-105 b?
Kepler-105 b is 1,497.8 light-years (459.2 parsecs) from Earth. Light arriving here tonight left the planet about 1,498 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 26,361,280 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-105 b scores 0.16, ranking #4,179 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-105
Kepler-105
- Surface temperature
- 5,933 K (Sun: 5,772 K)
- Mass
- 0.99 M☉
- Radius
- 1.03 R☉
- Age
- 4.3 billion years (Sun: 4.6)
The Kepler-105 Planetary System
Kepler-105 b is one of 2 known planets in the Kepler-105 system. Its siblings:
- Kepler-105 c (Super Earth)
Kepler-105 b — Complete Data
| Radius | 2.530 Earth radii (0.226 Jupiter radii) |
|---|---|
| Mass | 10.80 Earth masses (0.034 Jupiter masses) |
| Density | 3.68 g/cm³ (Earth: 5.51) |
| Orbital period | 5.41 days |
| Eccentricity | 0.020 |
| Earth Similarity Index | 0.16 |
| Distance from Earth | 1,497.8 light-years (459.2 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2013 |
Data: NASA Exoplanet Archive, last updated 2024-12-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-105 b
Is Kepler-105 b habitable?
Kepler-105 b is not known to orbit within the habitable zone of Kepler-105, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-105 b?
Kepler-105 b is about 1,498 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 26,361,280 years to get there.
How big is Kepler-105 b compared to Earth?
Kepler-105 b has 2.53 times the radius of Earth and about 10.8 times its mass.
How long is a year on Kepler-105 b?
One orbit around Kepler-105 takes 5.4 Earth days — short enough that 67 of its years would fit into one Earth year.
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