Kepler-342 e
Kepler-342 e is a terrestrial planet orbiting Kepler-342 in the constellation Cygnus. It lies about 2,549 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-342 e?
Kepler-342 e has a radius of 0.88 times that of Earth.
Is Kepler-342 e in the Habitable Zone?
The position of Kepler-342 e relative to the habitable zone of Kepler-342 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-342: 1.232–2.875 AU (conservative: 1.560–2.726 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-342 e — one full orbit around Kepler-342 — lasts just 39.5 hours, shorter than Mercury's 88-day year.
How Was Kepler-342 e Discovered?
Kepler-342 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-342 e?
Kepler-342 e is 2,549.3 light-years (781.6 parsecs) from Earth. Light arriving here tonight left the planet about 2,549 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 44,867,680 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-342 e scores 0.29, ranking #1,746 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-342
Kepler-342
- Surface temperature
- 6,175 K (Sun: 5,772 K)
- Radius
- 1.47 R☉
The Kepler-342 Planetary System
Kepler-342 e is one of 4 known planets in the Kepler-342 system. Its siblings:
- Kepler-342 b (Mini Neptune)
- Kepler-342 c (Super Earth)
- Kepler-342 d (Mini Neptune)
Kepler-342 e — Complete Data
| Radius | 0.880 Earth radii (0.079 Jupiter radii) |
|---|---|
| Orbital period | 1.64 days |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 2,549.3 light-years (781.6 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-342 e
Is Kepler-342 e habitable?
Kepler-342 e is not known to orbit within the habitable zone of Kepler-342, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-342 e?
Kepler-342 e is about 2,549 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 44,867,680 years to get there.
How big is Kepler-342 e compared to Earth?
Kepler-342 e has 0.88 times the radius of Earth.
How long is a year on Kepler-342 e?
One orbit around Kepler-342 takes 1.6 Earth days — short enough that 222 of its years would fit into one Earth year.
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