Key parameters at a glance
- A radius of 2.49 Earth radii
- A mass of 6.76 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 39.459 days
- Semi-major axis 0.2420 AU
- Equilibrium temperature 658 K (385 °C)
- Distance from Earth 2,549.27 light-years
- Earth Similarity Index 0.385
- Travel time at Voyager 1 speed 44,956,395 years
3 siblings around Kepler-342
Kepler-342 d shares its host star with 3 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-342 e | Rocky Terrestrial | 0.88 | 0.62 | 1.644 | 1,897 | 2016 |
| Kepler-342 b | Sub-Neptune | 2.25 | 5.69 | 15.170 | 905 | 2014 |
| Kepler-342 c | Super-Earth | 1.96 | 4.50 | 26.234 | 754 | 2014 |
| Kepler-342 d this | Sub-Neptune | 2.49 | 6.76 | 39.459 | 658 | 2014 |
Kepler-342 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1191of 1978
top 60.2%
This planet
2.49R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-342 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.49 | 11.21 |
| Mass (M⊕) | 1.00 | 6.76 | 317.83 |
| Density (g/cm³) | 5.51 | 2.41 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 44.83 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 63293562
Gaia DR2
Gaia DR2 2128298617506651904
Gaia DR3
Gaia DR3 2128298617506651904
System
Kepler-342
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 39.46 Earth days (10.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2420 AU.
Transit Fingerprint
Depth
0.024 %
Duration
8.164 h
Impact parameter b
0.750
Rp / R★
0.016950
Transit midpoint (BJD)
2,454,969.4615
Photometric dip
Transit produces a flux drop of 245 ppm lasting ≈ 8.16 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016950
Semi-major axis / stellar radius
22.400
Impact parameter (b)
0.750
Transit mid-time (BJD)
2,454,969.4615
Angular separation (arcsec)
0.31000
Eq. Temperature
658K
(385 °C)
Insolation (S⊕)
44.83
Earth = 1.00
Earth Similarity (ESI)
0.385
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-342
Spectral Class
F-type yellow-white
Effective Temperature
6,175 K — hotter than the Sun (5,778 K)
Estimated Age
2.82 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.472 R☉
Stellar Mass
1.213 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.187 dex
Stellar density
0.013 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.251 mas
Total Proper Motion
8.649 mas/yr
PM Right Ascension
-5.24 mas/yr
PM Declination
-6.88 mas/yr
Galactic Cartesian (pc)
x = 0.264 · y = -0.632 · z = 0.728
Equatorial (J2000)
RA 292.67805° · Dec 46.72668°
Galactic ℓ, b
79.008° · 13.177°
Ecliptic λ, β
312.274° · 66.867°
HTM-20 index
-943510250
Similar Worlds
Kepler-509 b
Sub-Neptune · F-type yellow-white
Radius 2.49 R⊕ · 1,084.3 ly
TOI-4495 b
Sub-Neptune · F-type yellow-white
Radius 2.48 R⊕ · 431.2 ly
Kepler-758 b
Sub-Neptune · F-type yellow-white
Radius 2.48 R⊕ · 4,899.9 ly
Kepler-126 d
Sub-Neptune · F-type yellow-white
Radius 2.50 R⊕ · 774.3 ly
Kepler-885 b
Sub-Neptune · F-type yellow-white
Radius 2.50 R⊕ · 2,124.3 ly
Kepler-1632 b
Sub-Neptune · F-type yellow-white
Radius 2.47 R⊕ · 2,337.8 ly