Key parameters at a glance
- A radius of 3.04 Earth radii
- A mass of 13.20 Earth masses
- Surface gravity around 1.43 g
- An orbital period of 15.163 days
- Semi-major axis 0.1270 AU
- Equilibrium temperature 829 K (556 °C)
- Distance from Earth 4,672.54 light-years
- Earth Similarity Index 0.295
- Travel time at Voyager 1 speed 82,400,300 years
2 siblings around Kepler-385
Kepler-385 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-385 b | Sub-Neptune | 2.73 | 12.80 | 10.044 | 951 | 2014 |
| Kepler-385 c this | Sub-Neptune | 3.04 | 13.20 | 15.163 | 829 | 2014 |
| Kepler-385 d | Sub-Neptune | 2.62 | 7.36 | 56.416 | 535 | 2020 |
Kepler-385 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#481of 1978
top 24.3%
This planet
3.04R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-385 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.04 | 11.21 |
| Mass (M⊕) | 1.00 | 13.20 | 317.83 |
| Density (g/cm³) | 5.51 | 2.58 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.43 | 2.53 |
| Insolation (S⊕) | 1.00 | 83.16 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 13.200 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 27082352
Gaia DR2
Gaia DR2 2135203000771400320
Gaia DR3
Gaia DR3 2135203000771400320
System
Kepler-385
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 15.16 Earth days (4.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1270 AU.
Transit Fingerprint
Depth
0.048 %
Duration
6.804 h
Impact parameter b
0.940
Rp / R★
0.018200
Transit midpoint (BJD)
2,454,977.4574
Photometric dip
Transit produces a flux drop of 480 ppm lasting ≈ 6.80 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018200
Semi-major axis / stellar radius
5.840
Impact parameter (b)
0.940
Transit mid-time (BJD)
2,454,977.4574
Angular separation (arcsec)
0.08860
Eq. Temperature
829K
(556 °C)
Insolation (S⊕)
83.16
Earth = 1.00
Earth Similarity (ESI)
0.295
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-385
Spectral Class
F-type yellow-white
Effective Temperature
6,326 K — hotter than the Sun (5,778 K)
Estimated Age
3.31 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.126 R☉
Stellar Mass
0.992 M☉
Metallicity [Fe/H]
0.01
Extended Stellar Properties
Surface gravity (log g)
4.412 dex
Stellar density
0.790 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.669 mas
Total Proper Motion
5.989 mas/yr
PM Right Ascension
2.64 mas/yr
PM Declination
-5.38 mas/yr
Galactic Cartesian (pc)
x = 0.263 · y = -0.582 · z = 0.770
Equatorial (J2000)
RA 294.33851° · Dec 50.33652°
Galactic ℓ, b
82.840° · 13.767°
Ecliptic λ, β
319.160° · 69.654°
HTM-20 index
371213697
Similar Worlds
Kepler-216 c
Sub-Neptune · F-type yellow-white
Radius 3.04 R⊕ · 3,873.0 ly
Kepler-791 b
Sub-Neptune · F-type yellow-white
Radius 3.05 R⊕ · 4,130.2 ly
Kepler-1518 b
Sub-Neptune · F-type yellow-white
Radius 3.05 R⊕ · 2,946.9 ly
Kepler-1937 b
Sub-Neptune · F-type yellow-white
Radius 3.02 R⊕ · 2,951.9 ly
Kepler-1797 b
Sub-Neptune · F-type yellow-white
Radius 3.06 R⊕ · 4,365.6 ly
K2-290 b
Sub-Neptune · F-type yellow-white
Radius 3.06 R⊕ · 890.1 ly