Kepler-520 c
Kepler-520 c is a terrestrial planet orbiting Kepler-520 in the constellation Cygnus. It lies about 2,035 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-520 c?
Kepler-520 c has a radius of 1.07 times that of Earth.
Is Kepler-520 c in the Habitable Zone?
The position of Kepler-520 c relative to the habitable zone of Kepler-520 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-520: 0.897–2.096 AU (conservative: 1.136–1.988 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-520 c — one full orbit around Kepler-520 — lasts 5.21 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-520 c Discovered?
Kepler-520 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-520 c?
Kepler-520 c is 2,034.9 light-years (623.9 parsecs) from Earth. Light arriving here tonight left the planet about 2,035 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 35,814,240 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-520 c scores 0.29, ranking #1,606 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-520
Kepler-520
- Surface temperature
- 6,112 K (Sun: 5,772 K)
- Mass
- 1.10 M☉
- Radius
- 1.09 R☉
- Age
- 2.0 billion years (Sun: 4.6)
The Kepler-520 Planetary System
Kepler-520 c is one of 2 known planets in the Kepler-520 system. Its siblings:
- Kepler-520 b (Super Earth)
Kepler-520 c — Complete Data
| Radius | 1.070 Earth radii (0.095 Jupiter radii) |
|---|---|
| Orbital period | 5.21 days |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 2,034.9 light-years (623.9 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-520 c
Is Kepler-520 c habitable?
Kepler-520 c is not known to orbit within the habitable zone of Kepler-520, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-520 c?
Kepler-520 c is about 2,035 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 35,814,240 years to get there.
How big is Kepler-520 c compared to Earth?
Kepler-520 c has 1.07 times the radius of Earth.
How long is a year on Kepler-520 c?
One orbit around Kepler-520 takes 5.2 Earth days — short enough that 70 of its years would fit into one Earth year.
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