Kepler-458 c
Kepler-458 c is a Neptune-like planet orbiting KIC 9663113 in the constellation Cygnus. It lies about 5,201 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-458 c?
Kepler-458 c has a radius of 4.20 times that of Earth.
Is Kepler-458 c in the Habitable Zone?
The position of Kepler-458 c relative to the habitable zone of KIC 9663113 cannot be precisely determined from the available orbital data.
Habitable zone of KIC 9663113: 1.829–4.276 AU (conservative: 2.317–4.054 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-458 c — one full orbit around KIC 9663113 — lasts 20.7 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-458 c Discovered?
Kepler-458 c 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-458 c?
Kepler-458 c is 5,201.3 light-years (1,594.7 parsecs) from Earth. Light arriving here tonight left the planet about 5,201 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 91,542,880 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-458 c scores 0.17, ranking #4,070 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: KIC 9663113
KIC 9663113
- Surface temperature
- 6,117 K (Sun: 5,772 K)
- Mass
- 1.15 M☉
- Radius
- 2.22 R☉
- Luminosity
- 6.1930 L☉
The KIC 9663113 Planetary System
Kepler-458 c is one of 2 known planets in the KIC 9663113 system. Its siblings:
- KIC 9663113 b (Neptune-like)
Kepler-458 c — Complete Data
| Radius | 4.200 Earth radii (0.375 Jupiter radii) |
|---|---|
| Orbital period | 20.74 days |
| Earth Similarity Index | 0.17 |
| Distance from Earth | 5,201.3 light-years (1,594.7 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-458 c
Is Kepler-458 c habitable?
Kepler-458 c is not known to orbit within the habitable zone of KIC 9663113, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is Kepler-458 c?
Kepler-458 c is about 5,201 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 91,542,880 years to get there.
How big is Kepler-458 c compared to Earth?
Kepler-458 c has 4.20 times the radius of Earth.
How long is a year on Kepler-458 c?
One orbit around KIC 9663113 takes 20.7 Earth days — short enough that 18 of its years would fit into one Earth year.
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