Kepler-105 c
Kepler-105 c is a super-Earth orbiting Kepler-105 in the constellation Lyra. It lies about 1,498 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is Kepler-105 c?
Kepler-105 c has a radius of 1.44 times that of Earth. Its mass is 5.6 times that of Earth, giving it a density of 10.40 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is Kepler-105 c in the Habitable Zone?
The position of Kepler-105 c 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 c — one full orbit around Kepler-105 — lasts 7.13 Earth days, shorter than Mercury's 88-day year. Its orbit is nearly circular (eccentricity 0.020).
How Was Kepler-105 c Discovered?
Kepler-105 c was discovered in 2014 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 c?
Kepler-105 c 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 c scores 0.29, ranking #1,726 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 c is one of 2 known planets in the Kepler-105 system. Its siblings:
- Kepler-105 b (Super Earth)
Kepler-105 c — Complete Data
| Radius | 1.440 Earth radii (0.128 Jupiter radii) |
|---|---|
| Mass | 5.60 Earth masses (0.018 Jupiter masses) |
| Density | 10.40 g/cm³ (Earth: 5.51) |
| Orbital period | 7.13 days |
| Eccentricity | 0.020 |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 1,497.8 light-years (459.2 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2024-12-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-105 c
Is Kepler-105 c habitable?
Kepler-105 c 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 c?
Kepler-105 c 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 c compared to Earth?
Kepler-105 c has 1.44 times the radius of Earth and about 5.6 times its mass.
How long is a year on Kepler-105 c?
One orbit around Kepler-105 takes 7.1 Earth days — short enough that 51 of its years would fit into one Earth year.
Explore Kepler-105 c in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
