Key parameters at a glance
- A radius of 2.16 Earth radii
- A mass of 5.31 Earth masses
- Surface gravity around 1.14 g
- An orbital period of 41.809 days
- Semi-major axis 0.2420 AU
- Equilibrium temperature 582 K (309 °C)
- Distance from Earth 1,789.57 light-years
- Earth Similarity Index 0.457
- Travel time at Voyager 1 speed 31,559,106 years
2 siblings around Kepler-142
Kepler-142 d 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 | Sub-Neptune | 2.86 | 8.55 | 4.762 | 1,201 | 2014 |
| Kepler-142 d this | Sub-Neptune | 2.16 | 5.31 | 41.809 | 582 | 2014 |
Kepler-142 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1731of 1978
top 87.5%
This planet
2.16R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-142 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.16 | 11.21 |
| Mass (M⊕) | 1.00 | 5.31 | 317.83 |
| Density (g/cm³) | 5.51 | 2.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.14 | 2.53 |
| Insolation (S⊕) | 1.00 | 22.07 | 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 41.81 Earth days (11.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2420 AU.
Transit Fingerprint
Depth
0.019 %
Duration
8.687 h
Impact parameter b
0.940
Rp / R★
0.012520
Transit midpoint (BJD)
2,454,981.6993
Photometric dip
Transit produces a flux drop of 190 ppm lasting ≈ 8.69 h.
Extended Orbital Architecture
Planet / star radius ratio
0.012520
Semi-major axis / stellar radius
41.480
Impact parameter (b)
0.940
Transit mid-time (BJD)
2,454,981.6993
Angular separation (arcsec)
0.44100
Eq. Temperature
582K
(309 °C)
Insolation (S⊕)
22.07
Earth = 1.00
Earth Similarity (ESI)
0.457
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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
HD 86226 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.16 R⊕ · 149.0 ly
Kepler-308 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.16 R⊕ · 4,357.2 ly
Kepler-1474 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.16 R⊕ · 3,851.6 ly
Kepler-745 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.16 R⊕ · 5,806.8 ly
Kepler-1322 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.15 R⊕ · 4,404.1 ly
Kepler-797 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.17 R⊕ · 4,289.8 ly