Kepler-418 b
Kepler-418 b is a cold gas giant orbiting Kepler-418 in the constellation Cygnus. It lies about 3,270 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is Kepler-418 b?
Kepler-418 b has a radius of 13.45 times that of Earth, or 1.20 times the radius of Jupiter. Its mass is 350 times that of Earth.
Is Kepler-418 b in the Habitable Zone?
The position of Kepler-418 b relative to the habitable zone of Kepler-418 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-418: 0.828–1.948 AU (conservative: 1.049–1.847 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-418 b — one full orbit around Kepler-418 — lasts 86.7 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.20).
How Was Kepler-418 b Discovered?
Kepler-418 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-418 b?
Kepler-418 b is 3,269.8 light-years (1,002.5 parsecs) from Earth. Light arriving here tonight left the planet about 3,270 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 57,548,480 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-418 b scores 0.17, ranking #4,108 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-418
Kepler-418
- Surface temperature
- 5,820 K (Sun: 5,772 K)
- Mass
- 0.98 M☉
- Radius
- 1.09 R☉
- Age
- 7.0 billion years (Sun: 4.6)
The Kepler-418 Planetary System
Kepler-418 b is one of 2 known planets in the Kepler-418 system. Its siblings:
- Kepler-418 c (Neptune-like)
Kepler-418 b — Complete Data
| Radius | 13.450 Earth radii (1.200 Jupiter radii) |
|---|---|
| Mass | 349.61 Earth masses (1.100 Jupiter masses) |
| Orbital period | 86.68 days |
| Eccentricity | 0.200 |
| Earth Similarity Index | 0.17 |
| Distance from Earth | 3,269.8 light-years (1,002.5 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2021-10-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-418 b
Is Kepler-418 b habitable?
Kepler-418 b is not known to orbit within the habitable zone of Kepler-418, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is Kepler-418 b?
Kepler-418 b is about 3,270 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 57,548,480 years to get there.
How big is Kepler-418 b compared to Earth?
Kepler-418 b has 13.45 times the radius of Earth and about 350 times its mass.
How long is a year on Kepler-418 b?
One orbit around Kepler-418 takes 86.7 Earth days.
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