Kepler-804 c
Kepler-804 c is a terrestrial planet orbiting Kepler-804 in the constellation Cygnus. It lies about 2,119 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-804 c?
Kepler-804 c has a radius of 1.14 times that of Earth.
Is Kepler-804 c in the Habitable Zone?
The position of Kepler-804 c relative to the habitable zone of Kepler-804 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-804: 0.797–1.875 AU (conservative: 1.009–1.778 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-804 c — one full orbit around Kepler-804 — lasts 9.65 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-804 c Discovered?
Kepler-804 c 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-804 c?
Kepler-804 c is 2,118.9 light-years (649.7 parsecs) from Earth. Light arriving here tonight left the planet about 2,119 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 37,292,640 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-804 c scores 0.30, ranking #1,346 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-804
Kepler-804
- Surface temperature
- 5,817 K (Sun: 5,772 K)
- Mass
- 1.01 M☉
- Radius
- 1.05 R☉
- Age
- 5.3 billion years (Sun: 4.6)
The Kepler-804 Planetary System
Kepler-804 c is one of 2 known planets in the Kepler-804 system. Its siblings:
- Kepler-804 b (Super Earth)
Kepler-804 c — Complete Data
| Radius | 1.140 Earth radii (0.102 Jupiter radii) |
|---|---|
| Orbital period | 9.65 days |
| Earth Similarity Index | 0.30 |
| Distance from Earth | 2,118.9 light-years (649.7 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-05-06. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-804 c
Is Kepler-804 c habitable?
Kepler-804 c is not known to orbit within the habitable zone of Kepler-804, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-804 c?
Kepler-804 c is about 2,119 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 37,292,640 years to get there.
How big is Kepler-804 c compared to Earth?
Kepler-804 c has 1.14 times the radius of Earth.
How long is a year on Kepler-804 c?
One orbit around Kepler-804 takes 9.7 Earth days — short enough that 38 of its years would fit into one Earth year.
Explore Kepler-804 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.
