Key parameters at a glance
- A radius of 1.72 Earth radii
- A mass of 3.61 Earth masses
- Surface gravity around 1.22 g
- An orbital period of 8.775 days
- Semi-major axis 0.0830 AU
- Equilibrium temperature 837 K (564 °C)
- Distance from Earth 3,067.77 light-years
- Earth Similarity Index 0.345
- Travel time at Voyager 1 speed 54,100,141 years
1 sibling around Kepler-317
Kepler-317 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-317 b | Sub-Neptune | 2.09 | 109.80 | 5.524 | 976 | 2014 |
| Kepler-317 c this | Super-Earth | 1.72 | 3.61 | 8.775 | 837 | 2014 |
Kepler-317 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#373of 1176
top 31.6%
This planet
1.72R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-317 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.72 | 11.21 |
| Mass (M⊕) | 1.00 | 3.61 | 317.83 |
| Density (g/cm³) | 5.51 | 3.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.22 | 2.53 |
| Insolation (S⊕) | 1.00 | 81.76 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 138890353
Gaia DR2
Gaia DR2 2052163518963966336
Gaia DR3
Gaia DR3 2052163518963966336
System
Kepler-317
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.78 Earth days (2.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0830 AU.
Transit Fingerprint
Depth
0.035 %
Duration
2.857 h
Impact parameter b
0.380
Rp / R★
0.018115
Transit midpoint (BJD)
2,454,966.7098
Photometric dip
Transit produces a flux drop of 352 ppm lasting ≈ 2.86 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018115
Semi-major axis / stellar radius
18.430
Impact parameter (b)
0.380
Transit mid-time (BJD)
2,454,966.7098
Angular separation (arcsec)
0.08820
Eq. Temperature
837K
(564 °C)
Insolation (S⊕)
81.76
Earth = 1.00
Earth Similarity (ESI)
0.345
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-317
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,497 K — cooler than the Sun (5,778 K)
Estimated Age
3.72 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.941 R☉
Stellar Mass
0.865 M☉
Metallicity [Fe/H]
0.13
Extended Stellar Properties
Surface gravity (log g)
4.493 dex
Stellar density
1.481 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.035 mas
Total Proper Motion
2.294 mas/yr
PM Right Ascension
0.51 mas/yr
PM Declination
-2.24 mas/yr
Galactic Cartesian (pc)
x = 0.328 · y = -0.704 · z = 0.630
Equatorial (J2000)
RA 294.94388° · Dec 39.03205°
Galactic ℓ, b
72.811° · 8.188°
Ecliptic λ, β
309.616° · 59.088°
HTM-20 index
-1991753327
Similar Worlds
Kepler-404 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.72 R⊕ · 2,650.1 ly
HD 20329 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.72 R⊕ · 207.7 ly
Kepler-927 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.72 R⊕ · 2,712.6 ly
TOI-4443.01
Super-Earth · G-type yellow (Sun-like)
Radius 1.72 R⊕ · 182.9 ly
Kepler-160 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.72 R⊕ · 3,056.1 ly
K2-58 d
Super-Earth · G-type yellow (Sun-like)
Radius 1.71 R⊕ · 592.8 ly