Kepler-37 e
Kepler-37 e is a exoplanet orbiting Kepler-37 in the constellation Lyra. It lies about 209 light-years from Earth and was discovered in 2014 using the transit timing variations method.
Is Kepler-37 e in the Habitable Zone?
The position of Kepler-37 e relative to the habitable zone of Kepler-37 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-37: 0.522–1.244 AU (conservative: 0.661–1.180 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-37 e — one full orbit around Kepler-37 — lasts 51.2 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-37 e Discovered?
Kepler-37 e was discovered in 2014 using the transit timing variations method, with observations from Kepler.
Transit timing variations reveal a planet through its gravitational tug on a sibling planet, which makes that sibling's transits arrive slightly early or late. The pattern of these deviations betrays the hidden planet's mass and orbit.
How Far Away Is Kepler-37 e?
Kepler-37 e is 208.5 light-years (63.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1818. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,669,600 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-37 e scores 0.37, ranking #649 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-37
Kepler-37
- Surface temperature
- 5,357 K (Sun: 5,772 K)
- Mass
- 0.79 M☉
- Radius
- 0.79 R☉
- Age
- 7.6 billion years (Sun: 4.6)
The Kepler-37 Planetary System
Kepler-37 e is one of 4 known planets in the Kepler-37 system. Its siblings:
- Kepler-37 b (Terrestrial)
- Kepler-37 c (Terrestrial)
- Kepler-37 d (Puffy Planet)
Kepler-37 e — Complete Data
| Orbital period | 51.20 days |
|---|---|
| Earth Similarity Index | 0.37 |
| Distance from Earth | 208.5 light-years (63.9 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit Timing Variations |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-05-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-37 e
Is Kepler-37 e habitable?
Kepler-37 e is not known to orbit within the habitable zone of Kepler-37.
How far away is Kepler-37 e?
Kepler-37 e is about 209 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,669,600 years to get there.
How long is a year on Kepler-37 e?
One orbit around Kepler-37 takes 51.2 Earth days.
Explore Kepler-37 e in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
