Key parameters at a glance
- A radius of 1.39 Earth radii
- A mass of 2.51 Earth masses
- Surface gravity around 1.30 g
- An orbital period of 12.310 days
- Semi-major axis 0.0960 AU
- Equilibrium temperature 651 K (378 °C)
- Distance from Earth 2,878.20 light-years
- Earth Similarity Index 0.475
- Travel time at Voyager 1 speed 50,757,103 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-386
Kepler-386 b 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-386 b this | Super-Earth | 1.39 | 2.51 | 12.310 | 651 | 2014 |
| Kepler-386 c | Super-Earth | 1.58 | 3.12 | 25.193 | 513 | 2014 |
Kepler-386 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#940of 1176
top 79.8%
This planet
1.39R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-386 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.39 | 11.21 |
| Mass (M⊕) | 1.00 | 2.51 | 317.83 |
| Density (g/cm³) | 5.51 | 5.14 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.30 | 2.53 |
| Insolation (S⊕) | 1.00 | 43.26 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 267669725
Gaia DR2
Gaia DR2 2129492824571882240
Gaia DR3
Gaia DR3 2129492824571882240
System
Kepler-386
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 12.31 Earth days (3.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0960 AU.
Transit Fingerprint
Depth
0.026 %
Duration
3.939 h
Impact parameter b
0.800
Rp / R★
0.015528
Transit midpoint (BJD)
2,454,974.8631
Photometric dip
Transit produces a flux drop of 264 ppm lasting ≈ 3.94 h.
Extended Orbital Architecture
Planet / star radius ratio
0.015528
Semi-major axis / stellar radius
25.690
Impact parameter (b)
0.800
Transit mid-time (BJD)
2,454,974.8631
Angular separation (arcsec)
0.10900
Eq. Temperature
651K
(378 °C)
Insolation (S⊕)
43.26
Earth = 1.00
Earth Similarity (ESI)
0.475
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-386
Spectral Class
K-type orange
Effective Temperature
5,178 K — cooler than the Sun (5,778 K)
Estimated Age
9.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.767 R☉
Stellar Mass
0.825 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.558 dex
Stellar density
1.580 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.105 mas
Total Proper Motion
11.171 mas/yr
PM Right Ascension
7.34 mas/yr
PM Declination
-8.42 mas/yr
Galactic Cartesian (pc)
x = 0.224 · y = -0.621 · z = 0.751
Equatorial (J2000)
RA 289.85892° · Dec 48.69381°
Galactic ℓ, b
80.040° · 15.720°
Ecliptic λ, β
309.623° · 69.416°
HTM-20 index
526806299
Similar Worlds
Kepler-224 b
Super-Earth · K-type orange
Radius 1.39 R⊕ · 2,550.8 ly
Kepler-1904 b
Super-Earth · K-type orange
Radius 1.39 R⊕ · 883.4 ly
Kepler-1761 b
Super-Earth · K-type orange
Radius 1.39 R⊕ · 721.4 ly
Kepler-716 c
Super-Earth · K-type orange
Radius 1.39 R⊕ · 2,071.1 ly
Kepler-1315 b
Super-Earth · K-type orange
Radius 1.38 R⊕ · 1,568.4 ly
Kepler-1120 b
Super-Earth · K-type orange
Radius 1.38 R⊕ · 2,006.6 ly