Key parameters at a glance
- A radius of 2.37 Earth radii
- A mass of 6.21 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 20.679 days
- Semi-major axis 0.1540 AU
- Equilibrium temperature 749 K (476 °C)
- Distance from Earth 2,507.68 light-years
- Earth Similarity Index 0.345
- Travel time at Voyager 1 speed 44,222,988 years
2 siblings around Kepler-336
Kepler-336 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-336 b | Rocky Terrestrial | 1.02 | 1.04 | 2.025 | 1,625 | 2014 |
| Kepler-336 c | Sub-Neptune | 2.10 | 5.06 | 9.600 | 967 | 2014 |
| Kepler-336 d this | Sub-Neptune | 2.37 | 6.21 | 20.679 | 749 | 2014 |
Kepler-336 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1375of 1978
top 69.5%
This planet
2.37R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-336 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.37 | 11.21 |
| Mass (M⊕) | 1.00 | 6.21 | 317.83 |
| Density (g/cm³) | 5.51 | 2.56 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 74.36 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122298677
Gaia DR2
Gaia DR2 2101792175299215488
Gaia DR3
Gaia DR3 2101792175301394048
System
Kepler-336
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 20.68 Earth days (5.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1540 AU.
Transit Fingerprint
Depth
0.032 %
Duration
4.515 h
Impact parameter b
0.500
Rp / R★
0.020700
Transit midpoint (BJD)
2,454,984.6914
Photometric dip
Transit produces a flux drop of 324 ppm lasting ≈ 4.52 h.
Extended Orbital Architecture
Planet / star radius ratio
0.020700
Semi-major axis / stellar radius
12.320
Impact parameter (b)
0.500
Transit mid-time (BJD)
2,454,984.6914
Angular separation (arcsec)
0.20000
Eq. Temperature
749K
(476 °C)
Insolation (S⊕)
74.36
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-336
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,867 K — hotter than the Sun (5,778 K)
Estimated Age
4.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.304 R☉
Stellar Mass
1.090 M☉
Metallicity [Fe/H]
0.34
Extended Stellar Properties
Surface gravity (log g)
4.264 dex
Stellar density
1.045 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.429 mas
Total Proper Motion
6.714 mas/yr
PM Right Ascension
-2.41 mas/yr
PM Declination
-6.27 mas/yr
Galactic Cartesian (pc)
x = 0.260 · y = -0.705 · z = 0.660
Equatorial (J2000)
RA 290.23762° · Dec 41.33136°
Galactic ℓ, b
73.240° · 12.434°
Ecliptic λ, β
304.092° · 62.396°
HTM-20 index
308780543
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Kepler-597 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.37 R⊕ · 2,163.8 ly