Key parameters at a glance
- A radius of 3.19 Earth radii
- A mass of 11.10 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 57.248 days
- Semi-major axis 0.2870 AU
- Equilibrium temperature 431 K (158 °C)
- Distance from Earth 3,535.24 light-years
- Earth Similarity Index 0.518
- Travel time at Voyager 1 speed 62,343,910 years
2 siblings around Kepler-351
Kepler-351 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-351 b | Sub-Neptune | 3.06 | 4.80 | 37.055 | 498 | 2014 |
| Kepler-351 c this | Sub-Neptune | 3.19 | 11.10 | 57.248 | 431 | 2014 |
| Kepler-351 d | Sub-Neptune | 2.72 | 7.85 | 142.544 | 318 | 2016 |
Kepler-351 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#358of 1978
top 18.0%
This planet
3.19R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-351 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.19 | 11.21 |
| Mass (M⊕) | 1.00 | 11.10 | 317.83 |
| Density (g/cm³) | 5.51 | 1.88 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.71 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 11.100 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 158218178
Gaia DR2
Gaia DR2 2105491997566014336
Gaia DR3
Gaia DR3 2105491997566014336
System
Kepler-351
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 57.25 Earth days (15.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2870 AU.
Transit Fingerprint
Depth
0.153 %
Duration
5.923 h
Impact parameter b
0.210
Rp / R★
0.035516
Transit midpoint (BJD)
2,455,017.6942
Photometric dip
Transit produces a flux drop of 1,533 ppm lasting ≈ 5.92 h.
Extended Orbital Architecture
Planet / star radius ratio
0.035516
Semi-major axis / stellar radius
74.360
Impact parameter (b)
0.210
Transit mid-time (BJD)
2,455,017.6942
Angular separation (arcsec)
0.26500
Eq. Temperature
431K
(158 °C)
Insolation (S⊕)
6.71
Earth = 1.00
Earth Similarity (ESI)
0.518
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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-351
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,643 K — cooler than the Sun (5,778 K)
Estimated Age
2.90 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.854 R☉
Stellar Mass
0.810 M☉
Metallicity [Fe/H]
-0.16
Extended Stellar Properties
Surface gravity (log g)
4.556 dex
Stellar density
2.348 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.895 mas
Total Proper Motion
19.873 mas/yr
PM Right Ascension
8.41 mas/yr
PM Declination
-18.01 mas/yr
Galactic Cartesian (pc)
x = 0.208 · y = -0.705 · z = 0.678
Equatorial (J2000)
RA 286.45279° · Dec 42.65779°
Galactic ℓ, b
73.306° · 15.543°
Ecliptic λ, β
298.880° · 64.456°
HTM-20 index
1304842111
Similar Worlds
Kepler-1294 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.19 R⊕ · 6,052.5 ly
HD 85426 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.19 R⊕ · 176.0 ly
Kepler-1634 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.19 R⊕ · 2,013.5 ly
TOI-908 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.19 R⊕ · 573.2 ly
HD 191939 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.20 R⊕ · 174.8 ly
Kepler-1710 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.20 R⊕ · 995.4 ly