Kepler-58 b
Kepler-58 b is a super-Earth orbiting Kepler-58 in the constellation Cygnus. It lies about 3,161 light-years from Earth and was discovered in 2012 using the transit method.
How Big Is Kepler-58 b?
Kepler-58 b has a radius of 2.78 times that of Earth. Its mass is 35.5 times that of Earth.
Is Kepler-58 b in the Habitable Zone?
The position of Kepler-58 b relative to the habitable zone of Kepler-58 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-58: 0.787–1.852 AU (conservative: 0.997–1.756 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-58 b — one full orbit around Kepler-58 — lasts 10.2 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-58 b Discovered?
Kepler-58 b was discovered in 2012 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-58 b?
Kepler-58 b is 3,161.3 light-years (969.3 parsecs) from Earth. Light arriving here tonight left the planet about 3,161 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 55,638,880 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-58 b scores 0.23, ranking #3,522 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-58
Kepler-58
- Surface temperature
- 5,843 K (Sun: 5,772 K)
- Mass
- 0.95 M☉
- Radius
- 1.03 R☉
The Kepler-58 Planetary System
Kepler-58 b is one of 4 known planets in the Kepler-58 system. Its siblings:
- Kepler-58 c (Super Earth)
- Kepler-58 d (Mini Neptune)
- Kepler-58 e (Super Earth)
Kepler-58 b — Complete Data
| Radius | 2.780 Earth radii (0.248 Jupiter radii) |
|---|---|
| Mass | 35.50 Earth masses (0.112 Jupiter masses) |
| Orbital period | 10.22 days |
| Earth Similarity Index | 0.23 |
| Distance from Earth | 3,161.3 light-years (969.3 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2012 |
Data: NASA Exoplanet Archive, last updated 2021-09-22. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-58 b
Is Kepler-58 b habitable?
Kepler-58 b is not known to orbit within the habitable zone of Kepler-58, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-58 b?
Kepler-58 b is about 3,161 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 55,638,880 years to get there.
How big is Kepler-58 b compared to Earth?
Kepler-58 b has 2.78 times the radius of Earth and about 35.5 times its mass.
How long is a year on Kepler-58 b?
One orbit around Kepler-58 takes 10.2 Earth days — short enough that 36 of its years would fit into one Earth year.
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