Key parameters at a glance
- A radius of 2.86 Earth radii
- A mass of 8.55 Earth masses
- Surface gravity around 1.05 g
- An orbital period of 4.762 days
- Semi-major axis 0.0570 AU
- Equilibrium temperature 1,201 K (928 °C)
- Distance from Earth 1,789.57 light-years
- Earth Similarity Index 0.194
- Travel time at Voyager 1 speed 31,559,106 years
2 siblings around Kepler-142
Kepler-142 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-142 b | Super-Earth | 1.99 | 4.62 | 2.024 | 1,597 | 2014 |
| Kepler-142 c this | Sub-Neptune | 2.86 | 8.55 | 4.762 | 1,201 | 2014 |
| Kepler-142 d | Sub-Neptune | 2.16 | 5.31 | 41.809 | 582 | 2014 |
Kepler-142 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#671of 1978
top 33.9%
This planet
2.86R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-142 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.86 | 11.21 |
| Mass (M⊕) | 1.00 | 8.55 | 317.83 |
| Density (g/cm³) | 5.51 | 2.01 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.05 | 2.53 |
| Insolation (S⊕) | 1.00 | 399.44 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 27394293
Gaia DR2
Gaia DR2 2128724678262662144
Gaia DR3
Gaia DR3 2128724678262662144
System
Kepler-142
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.76 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0570 AU.
Transit Fingerprint
Depth
0.050 %
Duration
3.303 h
Impact parameter b
0.370
Rp / R★
0.020461
Transit midpoint (BJD)
2,455,003.3354
Photometric dip
Transit produces a flux drop of 497 ppm lasting ≈ 3.30 h.
Extended Orbital Architecture
Planet / star radius ratio
0.020461
Semi-major axis / stellar radius
11.218
Impact parameter (b)
0.370
Transit mid-time (BJD)
2,455,003.3354
Angular separation (arcsec)
0.10400
Eq. Temperature
1,201K
(928 °C)
Insolation (S⊕)
399.44
Earth = 1.00
Earth Similarity (ESI)
0.194
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-142
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,790 K — hotter than the Sun (5,778 K)
Estimated Age
7.59 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.269 R☉
Stellar Mass
0.978 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.262 dex
Stellar density
0.740 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.794 mas
Total Proper Motion
21.174 mas/yr
PM Right Ascension
13.39 mas/yr
PM Declination
16.40 mas/yr
Galactic Cartesian (pc)
x = 0.281 · y = -0.600 · z = 0.749
Equatorial (J2000)
RA 295.11901° · Dec 48.48136°
Galactic ℓ, b
81.370° · 12.483°
Ecliptic λ, β
318.057° · 67.773°
HTM-20 index
1846212821
Similar Worlds
Kepler-1419 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.86 R⊕ · 4,887.7 ly
Kepler-1325 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.86 R⊕ · 3,174.7 ly
Kepler-172 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.86 R⊕ · 2,702.5 ly
Kepler-58 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.86 R⊕ · 3,161.3 ly
Kepler-1237 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.86 R⊕ · 3,471.3 ly
Kepler-170 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.86 R⊕ · 2,409.2 ly