Kepler-80 g
Kepler-80 g is a terrestrial planet orbiting Kepler-80 in the constellation Cygnus. It lies about 1,205 light-years from Earth and was discovered in 2017 using the transit method.
How Big Is Kepler-80 g?
Kepler-80 g has a radius of 1.13 times that of Earth.
Is Kepler-80 g in the Habitable Zone?
The position of Kepler-80 g relative to the habitable zone of Kepler-80 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-80: 0.334–0.824 AU (conservative: 0.423–0.782 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 ›
Temperature on Kepler-80 g
The equilibrium temperature of Kepler-80 g is about 418 K (145 °C) — hotter than anywhere on Earth. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C.
Orbit and Year Length
A year on Kepler-80 g — one full orbit around Kepler-80 — lasts 14.6 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-80 g Discovered?
Kepler-80 g was discovered in 2017 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-80 g?
Kepler-80 g is 1,205.0 light-years (369.5 parsecs) from Earth. Light arriving here tonight left the planet about 1,205 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 21,208,000 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-80 g scores 0.38, ranking #545 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-80
Kepler-80
- Surface temperature
- 4,540 K (Sun: 5,772 K)
- Mass
- 0.83 M☉
- Radius
- 0.68 R☉
The Kepler-80 Planetary System
Kepler-80 g is one of 6 known planets in the Kepler-80 system. Its siblings:
- Kepler-80 b (Puffy Planet)
- Kepler-80 c (Puffy Planet)
- Kepler-80 d (Super Earth)
- Kepler-80 e (Super Earth)
- Kepler-80 f (Terrestrial)
Kepler-80 g — Complete Data
| Radius | 1.130 Earth radii (0.101 Jupiter radii) |
|---|---|
| Orbital period | 14.65 days |
| Equilibrium temperature | 418 K (145 °C) |
| Earth Similarity Index | 0.38 |
| Distance from Earth | 1,205.0 light-years (369.5 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2017 |
Data: NASA Exoplanet Archive, last updated 2017-12-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-80 g
Is Kepler-80 g habitable?
Kepler-80 g is not known to orbit within the habitable zone of Kepler-80, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-80 g?
Kepler-80 g is about 1,205 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 21,208,000 years to get there.
How big is Kepler-80 g compared to Earth?
Kepler-80 g has 1.13 times the radius of Earth.
How long is a year on Kepler-80 g?
One orbit around Kepler-80 takes 14.6 Earth days — short enough that 25 of its years would fit into one Earth year.
Explore Kepler-80 g in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
