Key parameters at a glance
- A radius of 1.90 Earth radii
- A mass of 4.27 Earth masses
- Surface gravity around 1.18 g
- An orbital period of 28.551 days
- Semi-major axis 0.1580 AU
- Equilibrium temperature 418 K (145 °C)
- Distance from Earth 1,027.97 light-years
- Earth Similarity Index 0.639
- Travel time at Voyager 1 speed 18,128,227 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around Kepler-158
Kepler-158 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-158 d | Rocky Terrestrial | 0.43 | 0.05 | 0.645 | — | 2024 |
| Kepler-158 b | Sub-Neptune | 2.12 | 5.14 | 16.709 | 500 | 2014 |
| Kepler-158 c this | Super-Earth | 1.90 | 4.27 | 28.551 | 418 | 2014 |
Kepler-158 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#125of 1176
top 10.5%
This planet
1.90R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-158 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.90 | 11.21 |
| Mass (M⊕) | 1.00 | 4.27 | 317.83 |
| Density (g/cm³) | 5.51 | 3.42 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.18 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.68 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 120103325
Gaia DR2
Gaia DR2 2103295173333142784
Gaia DR3
Gaia DR3 2103295173333142784
System
Kepler-158
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 28.55 Earth days (7.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1580 AU.
Transit Fingerprint
Depth
0.081 %
Duration
4.248 h
Impact parameter b
0.610
Rp / R★
0.026045
Transit midpoint (BJD)
2,455,018.4768
Photometric dip
Transit produces a flux drop of 808 ppm lasting ≈ 4.25 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026045
Semi-major axis / stellar radius
55.000
Impact parameter (b)
0.610
Transit mid-time (BJD)
2,455,018.4768
Angular separation (arcsec)
0.50100
Eq. Temperature
418K
(145 °C)
Insolation (S⊕)
6.68
Earth = 1.00
Earth Similarity (ESI)
0.639
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-158
Spectral Class
K-type orange
Effective Temperature
4,623 K — cooler than the Sun (5,778 K)
Estimated Age
13.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.624 R☉
Stellar Mass
0.655 M☉
Metallicity [Fe/H]
-0.30
Extended Stellar Properties
Surface gravity (log g)
4.660 dex
Stellar density
2.570 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
3.144 mas
Total Proper Motion
49.513 mas/yr
PM Right Ascension
24.34 mas/yr
PM Declination
43.12 mas/yr
Galactic Cartesian (pc)
x = 0.186 · y = -0.746 · z = 0.640
Equatorial (J2000)
RA 284.03237° · Dec 39.78154°
Galactic ℓ, b
69.821° · 16.127°
Ecliptic λ, β
293.449° · 62.083°
HTM-20 index
-167544801
Similar Worlds
K2-155 d
Super-Earth · K-type orange
Radius 1.90 R⊕ · 237.4 ly
Kepler-601 b
Super-Earth · K-type orange
Radius 1.90 R⊕ · 1,353.0 ly
Kepler-196 b
Super-Earth · K-type orange
Radius 1.90 R⊕ · 1,472.0 ly
Kepler-1669 c
Super-Earth · K-type orange
Radius 1.90 R⊕ · 1,772.5 ly
K2-47 b
Super-Earth · K-type orange
Radius 1.89 R⊕ · 1,141.2 ly
TOI-5789 d
Super-Earth · K-type orange
Radius 1.91 R⊕ · 66.7 ly