Kepler-192 c
Kepler-192 c is a mini-Neptune orbiting Kepler-192 in the constellation Lyra. It lies about 2,126 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is Kepler-192 c?
Kepler-192 c has a radius of 2.79 times that of Earth.
Is Kepler-192 c in the Habitable Zone?
Kepler-192 c orbits inside the inner edge of the habitable zone of Kepler-192. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of Kepler-192: 0.647–1.538 AU (conservative: 0.820–1.458 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-192 c — one full orbit around Kepler-192 — lasts 21.2 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.150 AU — closer to its star than Mercury is to the Sun.
How Was Kepler-192 c Discovered?
Kepler-192 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-192 c?
Kepler-192 c is 2,125.5 light-years (651.7 parsecs) from Earth. Light arriving here tonight left the planet about 2,126 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 37,408,800 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-192 c scores 0.25, ranking #3,043 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-192
Kepler-192
- Surface temperature
- 5,487 K (Sun: 5,772 K)
- Mass
- 0.94 M☉
- Radius
- 0.94 R☉
- Age
- 6.8 billion years (Sun: 4.6)
The Kepler-192 Planetary System
Kepler-192 c is one of 3 known planets in the Kepler-192 system. Its siblings:
- Kepler-192 b (Mini Neptune)
- Kepler-192 d (Terrestrial)
Kepler-192 c — Complete Data
| Radius | 2.790 Earth radii (0.249 Jupiter radii) |
|---|---|
| Orbital period | 21.22 days |
| Orbital distance | 0.150 AU |
| Earth Similarity Index | 0.25 |
| Distance from Earth | 2,125.5 light-years (651.7 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-192 c
Is Kepler-192 c habitable?
No — Kepler-192 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is Kepler-192 c?
Kepler-192 c is about 2,126 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 37,408,800 years to get there.
How big is Kepler-192 c compared to Earth?
Kepler-192 c has 2.79 times the radius of Earth.
How long is a year on Kepler-192 c?
One orbit around Kepler-192 takes 21.2 Earth days — short enough that 17 of its years would fit into one Earth year.
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