Key parameters at a glance
- A radius of 3.88 Earth radii
- A mass of 14.30 Earth masses
- Surface gravity around 0.95 g
- An orbital period of 72.379 days
- Semi-major axis 0.3600 AU
- Equilibrium temperature 575 K (302 °C)
- Distance from Earth 2,514.59 light-years
- Earth Similarity Index 0.365
- Travel time at Voyager 1 speed 44,344,810 years
1 sibling around Kepler-368
Kepler-368 c 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-368 b | Sub-Neptune | 3.26 | 10.70 | 26.848 | 800 | 2014 |
| Kepler-368 c this | Sub-Neptune | 3.88 | 14.30 | 72.379 | 575 | 2014 |
Kepler-368 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#34of 1978
top 1.7%
This planet
3.88R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-368 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.88 | 11.21 |
| Mass (M⊕) | 1.00 | 14.30 | 317.83 |
| Density (g/cm³) | 5.51 | 1.35 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.95 | 2.53 |
| Insolation (S⊕) | 1.00 | 28.68 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 63066763
Gaia DR2
Gaia DR2 2126660856277325696
Gaia DR3
Gaia DR3 2126660856277325696
System
Kepler-368
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 72.38 Earth days (19.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3600 AU.
Transit Fingerprint
Depth
0.037 %
Duration
7.685 h
Impact parameter b
0.460
Rp / R★
0.017382
Transit midpoint (BJD)
2,455,012.5342
Photometric dip
Transit produces a flux drop of 366 ppm lasting ≈ 7.69 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017382
Semi-major axis / stellar radius
71.190
Impact parameter (b)
0.460
Transit mid-time (BJD)
2,455,012.5342
Angular separation (arcsec)
0.46700
Eq. Temperature
575K
(302 °C)
Insolation (S⊕)
28.68
Earth = 1.00
Earth Similarity (ESI)
0.365
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-368
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,502 K — cooler than the Sun (5,778 K)
Estimated Age
6.46 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
2.019 R☉
Stellar Mass
1.165 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
3.903 dex
Stellar density
0.130 g/cm³
Systemic radial velocity
0.20 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.269 mas
Total Proper Motion
20.820 mas/yr
PM Right Ascension
-5.33 mas/yr
PM Declination
-20.13 mas/yr
Galactic Cartesian (pc)
x = 0.262 · y = -0.652 · z = 0.712
Equatorial (J2000)
RA 291.88002° · Dec 45.38784°
Galactic ℓ, b
77.522° · 13.097°
Ecliptic λ, β
309.739° · 65.835°
HTM-20 index
-1065344232
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