Kepler-880 c
Kepler-880 c is a mini-Neptune orbiting Kepler-880 in the constellation Lyra. It lies about 1,961 light-years from Earth and was discovered in 2023 using the transit method.
How Big Is Kepler-880 c?
Kepler-880 c has a radius of 2.87 times that of Earth.
Is Kepler-880 c in the Habitable Zone?
Kepler-880 c orbits inside the inner edge of the habitable zone of Kepler-880. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of Kepler-880: 1.687–3.902 AU (conservative: 2.137–3.700 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-880 c
The equilibrium temperature of Kepler-880 c is about 1,407 K (1,134 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 927 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on Kepler-880 c — one full orbit around Kepler-880 — lasts 11.8 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.122 AU — closer to its star than Mercury is to the Sun.
How Was Kepler-880 c Discovered?
Kepler-880 c was discovered in 2023 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-880 c?
Kepler-880 c is 1,961.3 light-years (601.3 parsecs) from Earth. Light arriving here tonight left the planet about 1,961 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 34,518,880 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-880 c scores 0.22, ranking #3,669 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-880
Kepler-880
- Surface temperature
- 6,761 K (Sun: 5,772 K)
- Mass
- 1.46 M☉
- Radius
- 1.74 R☉
- Age
- 1.7 billion years (Sun: 4.6)
The Kepler-880 Planetary System
Kepler-880 c is one of 2 known planets in the Kepler-880 system. Its siblings:
- Kepler-880 b (Mini Neptune)
Kepler-880 c — Complete Data
| Radius | 2.870 Earth radii (0.256 Jupiter radii) |
|---|---|
| Orbital period | 11.81 days |
| Orbital distance | 0.122 AU |
| Equilibrium temperature | 1,407 K (1,134 °C) |
| Stellar irradiation | 926.72× Earth |
| Earth Similarity Index | 0.22 |
| Distance from Earth | 1,961.3 light-years (601.3 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2017-05-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-880 c
Is Kepler-880 c habitable?
No — Kepler-880 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is Kepler-880 c?
Kepler-880 c is about 1,961 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 34,518,880 years to get there.
How big is Kepler-880 c compared to Earth?
Kepler-880 c has 2.87 times the radius of Earth.
How long is a year on Kepler-880 c?
One orbit around Kepler-880 takes 11.8 Earth days — short enough that 31 of its years would fit into one Earth year.
Explore Kepler-880 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.
