Key parameters at a glance
- A radius of 2.29 Earth radii
- A mass of 5.86 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 31.782 days
- Semi-major axis 0.1910 AU
- Equilibrium temperature 528 K (255 °C)
- Distance from Earth 1,641.99 light-years
- Earth Similarity Index 0.489
- Travel time at Voyager 1 speed 28,956,434 years
2 siblings around Kepler-319
Kepler-319 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-319 b | Super-Earth | 1.63 | 3.29 | 4.363 | 1,023 | 2014 |
| Kepler-319 c | Sub-Neptune | 2.63 | 7.41 | 6.941 | 876 | 2014 |
| Kepler-319 d this | Sub-Neptune | 2.29 | 5.86 | 31.782 | 528 | 2014 |
Kepler-319 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1519of 1978
top 76.7%
This planet
2.29R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-319 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.29 | 11.21 |
| Mass (M⊕) | 1.00 | 5.86 | 317.83 |
| Density (g/cm³) | 5.51 | 2.68 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 17.96 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 121786630
Gaia DR2
Gaia DR2 2101230049979183232
Gaia DR3
Gaia DR3 2101230049979183232
System
Kepler-319
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 31.78 Earth days (8.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1910 AU.
Transit Fingerprint
Depth
0.062 %
Duration
3.863 h
Impact parameter b
0.550
Rp / R★
0.023415
Transit midpoint (BJD)
2,454,967.8667
Photometric dip
Transit produces a flux drop of 620 ppm lasting ≈ 3.86 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023415
Semi-major axis / stellar radius
29.600
Impact parameter (b)
0.550
Transit mid-time (BJD)
2,454,967.8667
Angular separation (arcsec)
0.37900
Eq. Temperature
528K
(255 °C)
Insolation (S⊕)
17.96
Earth = 1.00
Earth Similarity (ESI)
0.489
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-319
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,526 K — cooler than the Sun (5,778 K)
Estimated Age
1.07 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.903 R☉
Stellar Mass
0.933 M☉
Metallicity [Fe/H]
0.06
Extended Stellar Properties
Surface gravity (log g)
4.487 dex
Stellar density
1.530 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.958 mas
Total Proper Motion
6.455 mas/yr
PM Right Ascension
2.95 mas/yr
PM Declination
-5.74 mas/yr
Galactic Cartesian (pc)
x = 0.248 · y = -0.728 · z = 0.640
Equatorial (J2000)
RA 288.81198° · Dec 39.77064°
Galactic ℓ, b
71.322° · 12.754°
Ecliptic λ, β
300.962° · 61.203°
HTM-20 index
-96345353
Similar Worlds
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Kepler-1374 b
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HD 35843 b
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Kepler-1227 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.29 R⊕ · 2,034.3 ly