Kepler-100 e
Kepler-100 e is a Neptune-like planet orbiting Kepler-100 in the constellation Lyra. It lies about 994 light-years from Earth and was discovered in 2023 using the radial velocity method.
Is Kepler-100 e in the Habitable Zone?
The position of Kepler-100 e relative to the habitable zone of Kepler-100 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on Kepler-100 e — one full orbit around Kepler-100 — lasts 60.9 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.312 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.026).
How Was Kepler-100 e Discovered?
Kepler-100 e was discovered in 2023 using the radial velocity method, with observations from W. M. Keck Observatory.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is Kepler-100 e?
Kepler-100 e is 993.6 light-years (304.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1033. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 17,487,360 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-100 e scores 0.19, ranking #3,992 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-100
Kepler-100
- Mass
- 1.10 M☉
The Kepler-100 Planetary System
Kepler-100 e is one of 4 known planets in the Kepler-100 system. Its siblings:
- Kepler-100 b (Super Earth)
- Kepler-100 c (Super Earth)
- Kepler-100 d (Super Earth)
Kepler-100 e — Complete Data
| Mass (best estimate) | 24.14 Earth masses |
|---|---|
| Orbital period | 60.89 days |
| Orbital distance | 0.312 AU |
| Eccentricity | 0.026 |
| Earth Similarity Index | 0.19 |
| Distance from Earth | 993.6 light-years (304.6 parsecs) |
| Constellation | Lyra |
| Discovery method | Radial Velocity |
| Discovery facility | W. M. Keck Observatory |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2024-02-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-100 e
Is Kepler-100 e habitable?
Kepler-100 e is not known to orbit within the habitable zone of Kepler-100, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is Kepler-100 e?
Kepler-100 e is about 994 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 17,487,360 years to get there.
How long is a year on Kepler-100 e?
One orbit around Kepler-100 takes 60.9 Earth days.
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