Key parameters at a glance
- A radius of 3.04 Earth radii
- A mass of 9.48 Earth masses
- Surface gravity around 1.03 g
- An orbital period of 54.419 days
- Semi-major axis 0.2900 AU
- Equilibrium temperature 443 K (170 °C)
- Distance from Earth 3,532.47 light-years
- Earth Similarity Index 0.510
- Travel time at Voyager 1 speed 62,295,020 years
1 sibling around Kepler-227
Kepler-227 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-227 b | Sub-Neptune | 3.11 | 9.85 | 9.488 | 793 | 2014 |
| Kepler-227 c this | Sub-Neptune | 3.04 | 9.48 | 54.419 | 443 | 2014 |
Kepler-227 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-227 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.04 | 11.21 |
| Mass (M⊕) | 1.00 | 9.48 | 317.83 |
| Density (g/cm³) | 5.51 | 1.85 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.03 | 2.53 |
| Insolation (S⊕) | 1.00 | 10.19 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 26539443
Gaia DR2
Gaia DR2 2129273849959814656
Gaia DR3
Gaia DR3 2129273849959814656
System
Kepler-227
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 54.42 Earth days (14.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2900 AU.
Transit Fingerprint
Depth
0.087 %
Duration
4.511 h
Impact parameter b
0.070
Rp / R★
0.027295
Transit midpoint (BJD)
2,454,995.5104
Photometric dip
Transit produces a flux drop of 875 ppm lasting ≈ 4.51 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027295
Semi-major axis / stellar radius
96.990
Impact parameter (b)
0.070
Transit mid-time (BJD)
2,454,995.5104
Angular separation (arcsec)
0.26800
Eq. Temperature
443K
(170 °C)
Insolation (S⊕)
10.19
Earth = 1.00
Earth Similarity (ESI)
0.510
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-227
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,854 K — hotter than the Sun (5,778 K)
Estimated Age
3.98 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.091 R☉
Stellar Mass
0.954 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
4.401 dex
Stellar density
1.230 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.895 mas
Total Proper Motion
5.000 mas/yr
PM Right Ascension
1.85 mas/yr
PM Declination
4.64 mas/yr
Galactic Cartesian (pc)
x = 0.249 · y = -0.619 · z = 0.745
Equatorial (J2000)
RA 291.93427° · Dec 48.14168°
Galactic ℓ, b
80.102° · 14.238°
Ecliptic λ, β
312.535° · 68.366°
HTM-20 index
-709182871
Similar Worlds
Kepler-1490 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.04 R⊕ · 2,814.5 ly
Kepler-347 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.04 R⊕ · 4,236.4 ly
Kepler-1844 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.04 R⊕ · 5,885.0 ly
TOI-261.01
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.04 R⊕ · 373.4 ly
Kepler-1664 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.03 R⊕ · 2,044.0 ly
Kepler-1779 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.03 R⊕ · 2,963.1 ly