Key parameters at a glance
- A radius of 1.32 Earth radii
- A mass of 2.30 Earth masses
- Surface gravity around 1.32 g
- An orbital period of 1.732 days
- Semi-major axis 0.0280 AU
- Equilibrium temperature 1,546 K (1273 °C)
- Distance from Earth 2,523.51 light-years
- Earth Similarity Index 0.190
- Travel time at Voyager 1 speed 44,502,121 years
2 siblings around Kepler-157
Kepler-157 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-157 b this | Super-Earth | 1.32 | 2.30 | 1.732 | 1,546 | 2014 |
| Kepler-157 d | Super-Earth | 1.46 | 2.73 | 7.026 | 969 | 2016 |
| Kepler-157 c | Sub-Neptune | 2.24 | 5.65 | 13.541 | 779 | 2014 |
Kepler-157 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1049of 1176
top 89.1%
This planet
1.32R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-157 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.32 | 11.21 |
| Mass (M⊕) | 1.00 | 2.30 | 317.83 |
| Density (g/cm³) | 5.51 | 5.50 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.32 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,572.31 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122716806
Gaia DR2
Gaia DR2 2052941389074846336
Gaia DR3
Gaia DR3 2052941389074846336
System
Kepler-157
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.73 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0280 AU.
Transit Fingerprint
Depth
0.018 %
Duration
2.186 h
Impact parameter b
0.020
Rp / R★
0.011520
Transit midpoint (BJD)
2,454,967.5302
Photometric dip
Transit produces a flux drop of 182 ppm lasting ≈ 2.19 h.
Extended Orbital Architecture
Planet / star radius ratio
0.011520
Semi-major axis / stellar radius
6.029
Impact parameter (b)
0.020
Transit mid-time (BJD)
2,454,967.5302
Angular separation (arcsec)
0.03620
Eq. Temperature
1,546K
(1273 °C)
Insolation (S⊕)
1,572.31
Earth = 1.00
Earth Similarity (ESI)
0.190
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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-157
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,774 K — cooler than the Sun (5,778 K)
Estimated Age
7.59 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.044 R☉
Stellar Mass
0.950 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.389 dex
Stellar density
0.800 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
1.264 mas
Total Proper Motion
4.931 mas/yr
PM Right Ascension
4.39 mas/yr
PM Declination
2.24 mas/yr
Galactic Cartesian (pc)
x = 0.280 · y = -0.726 · z = 0.628
Equatorial (J2000)
RA 291.09723° · Dec 38.87560°
Galactic ℓ, b
71.276° · 10.773°
Ecliptic λ, β
303.914° · 59.855°
HTM-20 index
1926531787
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Kepler-603 d
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Kepler-1179 b
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