Key parameters at a glance
- A radius of 1.17 Earth radii
- A mass of 14.70 Earth masses
- Surface gravity around 10.74 g
- An orbital period of 10.558 days
- Semi-major axis 0.0910 AU
- Equilibrium temperature 796 K (523 °C)
- Distance from Earth 2,011.20 light-years
- Earth Similarity Index 0.230
- Travel time at Voyager 1 speed 35,467,485 years
2 siblings around Kepler-339
Kepler-339 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-339 b | Super-Earth | 1.42 | 2.60 | 4.978 | 1,023 | 2014 |
| Kepler-339 c | Rocky Terrestrial | 1.15 | 7.30 | 6.988 | 914 | 2014 |
| Kepler-339 d this | Rocky Terrestrial | 1.17 | 14.70 | 10.558 | 796 | 2014 |
Kepler-339 d Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#135of 570
top 23.5%
This planet
1.17R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Kepler-339 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.17 | 11.21 |
| Mass (M⊕) | 1.00 | 14.70 | 317.83 |
| Density (g/cm³) | 5.51 | 50.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 10.74 | 2.53 |
| Insolation (S⊕) | 1.00 | 58.65 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 14.700 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 26817284
Gaia DR2
Gaia DR2 2128911251641171200
Gaia DR3
Gaia DR3 2128911251641171200
System
Kepler-339
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.56 Earth days (2.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0910 AU.
Transit Fingerprint
Depth
0.021 %
Duration
3.410 h
Impact parameter b
0.250
Rp / R★
0.013167
Transit midpoint (BJD)
2,454,969.3466
Photometric dip
Transit produces a flux drop of 209 ppm lasting ≈ 3.41 h.
Extended Orbital Architecture
Planet / star radius ratio
0.013167
Semi-major axis / stellar radius
23.910
Impact parameter (b)
0.250
Transit mid-time (BJD)
2,454,969.3466
Angular separation (arcsec)
0.14800
Eq. Temperature
796K
(523 °C)
Insolation (S⊕)
58.65
Earth = 1.00
Earth Similarity (ESI)
0.230
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-339
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,631 K — cooler than the Sun (5,778 K)
Estimated Age
0.98 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.802 R☉
Stellar Mass
0.870 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.586 dex
Stellar density
1.770 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.593 mas
Total Proper Motion
7.785 mas/yr
PM Right Ascension
-2.07 mas/yr
PM Declination
-7.51 mas/yr
Galactic Cartesian (pc)
x = 0.263 · y = -0.609 · z = 0.748
Equatorial (J2000)
RA 293.35170° · Dec 48.44459°
Galactic ℓ, b
80.801° · 13.516°
Ecliptic λ, β
315.197° · 68.251°
HTM-20 index
-759188989
Similar Worlds
Kepler-185 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 1,522.3 ly
Kepler-1035 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 1,833.4 ly
Kepler-295 c
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 5,542.0 ly
Kepler-1955 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 1,465.6 ly
Kepler-1933 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.18 R⊕ · 1,069.8 ly
Kepler-1390 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.18 R⊕ · 2,359.5 ly