Kepler-167 e
Kepler-167 e is a cold gas giant orbiting Kepler-167 in the constellation Cygnus. It lies about 1,115 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-167 e?
Kepler-167 e has a radius of 10.16 times that of Earth, or 0.91 times the radius of Jupiter. Its mass is 321 times that of Earth, giving it a density of 1.68 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is Kepler-167 e in the Habitable Zone?
Kepler-167 e orbits beyond the outer edge of the habitable zone of Kepler-167. At that distance, any surface water would almost certainly be frozen.
Habitable zone of Kepler-167: 0.423–1.028 AU (conservative: 0.536–0.975 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on Kepler-167 e
The equilibrium temperature of Kepler-167 e is about 134 K (-139 °C) — well below freezing. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C.
Orbit and Year Length
A year on Kepler-167 e — one full orbit around Kepler-167 — lasts 1,071.2 Earth days, longer than an Earth year. It orbits at an average distance of 1.883 AU. Its orbit is mildly elliptical (eccentricity 0.29).
How Was Kepler-167 e Discovered?
Kepler-167 e 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-167 e?
Kepler-167 e is 1,115.2 light-years (341.9 parsecs) from Earth. Light arriving here tonight left the planet about 1,115 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 19,627,520 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-167 e scores 0.17, ranking #4,102 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-167
Kepler-167 e belongs to a system of 2 stars; it orbits Kepler-167.
Kepler-167
- Surface temperature
- 4,884 K (Sun: 5,772 K)
- Mass
- 0.78 M☉
- Radius
- 0.75 R☉
- Luminosity
- 0.2890 L☉
- Age
- 7.1 billion years (Sun: 4.6)
The Kepler-167 Planetary System
Kepler-167 e is one of 4 known planets in the Kepler-167 system. Its siblings:
- Kepler-167 b (Super Earth)
- Kepler-167 c (Super Earth)
- Kepler-167 d (Terrestrial)
Kepler-167 e — Complete Data
| Radius | 10.160 Earth radii (0.906 Jupiter radii) |
|---|---|
| Mass | 321.01 Earth masses (1.010 Jupiter masses) |
| Density | 1.68 g/cm³ (Earth: 5.51) |
| Orbital period | 1,071.23 days |
| Orbital distance | 1.883 AU |
| Eccentricity | 0.290 |
| Equilibrium temperature | 134 K (-139 °C) |
| Earth Similarity Index | 0.17 |
| Distance from Earth | 1,115.2 light-years (341.9 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2022-07-18. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-167 e
Is Kepler-167 e habitable?
No — Kepler-167 e orbits outside the habitable zone of Kepler-167 and is likely too cold for liquid water on its surface.
How far away is Kepler-167 e?
Kepler-167 e is about 1,115 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 19,627,520 years to get there.
How big is Kepler-167 e compared to Earth?
Kepler-167 e has 10.16 times the radius of Earth and about 321 times its mass.
How long is a year on Kepler-167 e?
One orbit around Kepler-167 takes 1,071.2 Earth days.
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