Key parameters at a glance
- A radius of 0.73 Earth radii
- A mass of 0.32 Earth masses
- Surface gravity around 0.59 g
- An orbital period of 3.410 days
- Semi-major axis 0.0390 AU
- Equilibrium temperature 892 K (619 °C)
- Distance from Earth 1,370.01 light-years
- Earth Similarity Index 0.334
- Travel time at Voyager 1 speed 24,160,041 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around Kepler-124
Kepler-124 b 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-124 b this | Rocky Terrestrial | 0.73 | 0.32 | 3.410 | 892 | 2014 |
| Kepler-124 c | Super-Earth | 1.75 | 3.71 | 13.821 | 560 | 2014 |
| Kepler-124 d | Rocky Terrestrial | 1.11 | 1.41 | 30.951 | 428 | 2014 |
Kepler-124 b Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#518of 570
top 90.7%
This planet
0.73R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Kepler-124 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 0.73 | 11.21 |
| Mass (M⊕) | 1.00 | 0.32 | 317.83 |
| Density (g/cm³) | 5.51 | 4.45 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.59 | 2.53 |
| Insolation (S⊕) | 1.00 | 198.84 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 399860218
Gaia DR2
Gaia DR2 2131287021388901504
Gaia DR3
Gaia DR3 2131287021388901504
System
Kepler-124
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.41 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0390 AU.
Transit Fingerprint
Depth
0.014 %
Duration
2.389 h
Impact parameter b
0.140
Rp / R★
0.011207
Transit midpoint (BJD)
2,454,964.5755
Photometric dip
Transit produces a flux drop of 136 ppm lasting ≈ 2.39 h.
Extended Orbital Architecture
Planet / star radius ratio
0.011207
Semi-major axis / stellar radius
2.850
Impact parameter (b)
0.140
Transit mid-time (BJD)
2,454,964.5755
Angular separation (arcsec)
0.09280
Eq. Temperature
892K
(619 °C)
Insolation (S⊕)
198.84
Earth = 1.00
Earth Similarity (ESI)
0.334
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-124
Spectral Class
K-type orange
Effective Temperature
4,984 K — cooler than the Sun (5,778 K)
Estimated Age
1.82 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.636 R☉
Stellar Mass
0.706 M☉
Metallicity [Fe/H]
-0.46
Extended Stellar Properties
Surface gravity (log g)
4.669 dex
Stellar density
1.870 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.352 mas
Total Proper Motion
8.772 mas/yr
PM Right Ascension
-8.72 mas/yr
PM Declination
-0.92 mas/yr
Galactic Cartesian (pc)
x = 0.189 · y = -0.627 · z = 0.755
Equatorial (J2000)
RA 286.75273° · Dec 49.06488°
Galactic ℓ, b
79.589° · 17.751°
Ecliptic λ, β
304.464° · 70.506°
HTM-20 index
-724135319
Similar Worlds
Kepler-1967 b
Rocky Terrestrial · K-type orange
Radius 0.73 R⊕ · 812.5 ly
Kepler-1850 b
Rocky Terrestrial · K-type orange
Radius 0.73 R⊕ · 816.0 ly
Kepler-345 b
Rocky Terrestrial · K-type orange
Radius 0.74 R⊕ · 848.0 ly
Kepler-444 f
Rocky Terrestrial · K-type orange
Radius 0.74 R⊕ · 118.8 ly
Kepler-378 b
Rocky Terrestrial · K-type orange
Radius 0.75 R⊕ · 496.1 ly
HD 23472 d
Rocky Terrestrial · K-type orange
Radius 0.75 R⊕ · 127.3 ly