Kepler-413 b
Kepler-413 b is a Neptune-like planet orbiting Kepler-413 in the constellation Cygnus. It lies about 2,764 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is Kepler-413 b?
Kepler-413 b has a radius of 4.35 times that of Earth. Its mass is 67.0 times that of Earth, giving it a density of 3.20 g/cm³ — between that of rocky and gaseous planets.
Is Kepler-413 b in the Habitable Zone?
Kepler-413 b orbits inside the inner edge of the habitable zone of Kepler-413. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of Kepler-413: 0.408–0.998 AU (conservative: 0.516–0.946 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-413 b — one full orbit around Kepler-413 — lasts 66.3 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.355 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.12).
How Was Kepler-413 b Discovered?
Kepler-413 b was discovered in 2014 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-413 b?
Kepler-413 b is 2,764.3 light-years (847.5 parsecs) from Earth. Light arriving here tonight left the planet about 2,764 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 48,651,680 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-413 b scores 0.44, ranking #375 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-413
Kepler-413 b is a circumbinary planet — it orbits around two stars at once, like Tatooine in Star Wars.
Kepler-413
- Surface temperature
- 4,700 K (Sun: 5,772 K)
- Mass
- 0.82 M☉
- Radius
- 0.78 R☉
Planetary System
Kepler-413 b is the only planet known to orbit Kepler-413 so far.
Kepler-413 b — Complete Data
| Radius | 4.347 Earth radii (0.388 Jupiter radii) |
|---|---|
| Mass | 67.00 Earth masses (0.211 Jupiter masses) |
| Density | 3.20 g/cm³ (Earth: 5.51) |
| Orbital period | 66.26 days |
| Orbital distance | 0.355 AU |
| Eccentricity | 0.118 |
| Earth Similarity Index | 0.44 |
| Distance from Earth | 2,764.3 light-years (847.5 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-413 b
Is Kepler-413 b habitable?
No — Kepler-413 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is Kepler-413 b?
Kepler-413 b is about 2,764 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 48,651,680 years to get there.
How big is Kepler-413 b compared to Earth?
Kepler-413 b has 4.35 times the radius of Earth and about 67.0 times its mass.
How long is a year on Kepler-413 b?
One orbit around Kepler-413 takes 66.3 Earth days.
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