Kepler-80 f
Kepler-80 f is a terrestrial planet orbiting Kepler-80 in the constellation Cygnus. It lies about 1,205 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-80 f?
Kepler-80 f has a radius of 1.21 times that of Earth.
Is Kepler-80 f in the Habitable Zone?
Kepler-80 f orbits inside the inner edge of the habitable zone of Kepler-80. So close to its star, surface conditions are far too hot for liquid water.
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 ›
Orbit and Year Length
A year on Kepler-80 f — one full orbit around Kepler-80 — lasts just 23.7 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.018 AU — closer to its star than Mercury is to the Sun.
How Was Kepler-80 f Discovered?
Kepler-80 f was discovered in 2016 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 f?
Kepler-80 f 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 f scores 0.29, ranking #1,724 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 f 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 g (Terrestrial)
Kepler-80 f — Complete Data
| Radius | 1.210 Earth radii (0.108 Jupiter radii) |
|---|---|
| Orbital period | 0.99 days |
| Orbital distance | 0.018 AU |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 1,205.0 light-years (369.5 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-08-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-80 f
Is Kepler-80 f habitable?
No — Kepler-80 f orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is Kepler-80 f?
Kepler-80 f 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 f compared to Earth?
Kepler-80 f has 1.21 times the radius of Earth.
How long is a year on Kepler-80 f?
One orbit around Kepler-80 takes 1.0 Earth days — short enough that 370 of its years would fit into one Earth year.
Explore Kepler-80 f in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
