Key parameters at a glance
- A radius of 2.04 Earth radii
- A mass of 4.82 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 91.773 days
- Semi-major axis 0.3800 AU
- Equilibrium temperature 359 K (86 °C)
- Distance from Earth 2,416.01 light-years
- Earth Similarity Index 0.705
- Travel time at Voyager 1 speed 42,606,398 years
1 sibling around Kepler-230
Kepler-230 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-230 b | Neptune-like | 4.26 | 16.80 | 32.626 | 506 | 2014 |
| Kepler-230 c this | Sub-Neptune | 2.04 | 4.82 | 91.773 | 359 | 2014 |
Kepler-230 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1904of 1978
top 96.2%
This planet
2.04R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-230 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.04 | 11.21 |
| Mass (M⊕) | 1.00 | 4.82 | 317.83 |
| Density (g/cm³) | 5.51 | 3.12 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 2.98 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 377782363
Gaia DR2
Gaia DR2 2131911750150748160
Gaia DR3
Gaia DR3 2131911750150748160
System
Kepler-230
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 91.77 Earth days (25.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3800 AU.
Transit Fingerprint
Depth
0.065 %
Duration
6.034 h
Impact parameter b
0.030
Rp / R★
0.024534
Transit midpoint (BJD)
2,455,026.8307
Photometric dip
Transit produces a flux drop of 652 ppm lasting ≈ 6.03 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024534
Semi-major axis / stellar radius
52.900
Impact parameter (b)
0.030
Transit mid-time (BJD)
2,455,026.8307
Angular separation (arcsec)
0.51300
Eq. Temperature
359K
(86 °C)
Insolation (S⊕)
2.98
Earth = 1.00
Earth Similarity (ESI)
0.705
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
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-230
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,588 K — cooler than the Sun (5,778 K)
Estimated Age
1.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.817 R☉
Stellar Mass
0.784 M☉
Metallicity [Fe/H]
-0.21
Extended Stellar Properties
Surface gravity (log g)
4.551 dex
Stellar density
1.720 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.321 mas
Total Proper Motion
15.860 mas/yr
PM Right Ascension
-0.05 mas/yr
PM Declination
-15.86 mas/yr
Galactic Cartesian (pc)
x = 0.179 · y = -0.638 · z = 0.749
Equatorial (J2000)
RA 285.71857° · Dec 48.50580°
Galactic ℓ, b
78.784° · 18.188°
Ecliptic λ, β
302.001° · 70.204°
HTM-20 index
-15739953
Similar Worlds
Kepler-1122 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.04 R⊕ · 4,013.1 ly
K2-389 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.04 R⊕ · 845.4 ly
HD 20794 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.04 R⊕ · 19.6 ly
K2-175 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.04 R⊕ · 806.5 ly
GJ 2030 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.03 R⊕ · 120.9 ly
K2-229 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.03 R⊕ · 334.5 ly