Key parameters at a glance
- A radius of 3.11 Earth radii
- A mass of 9.85 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 9.488 days
- Semi-major axis 0.0900 AU
- Equilibrium temperature 793 K (520 °C)
- Distance from Earth 3,532.47 light-years
- Earth Similarity Index 0.293
- Travel time at Voyager 1 speed 62,295,020 years
1 sibling around Kepler-227
Kepler-227 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-227 b this | Sub-Neptune | 3.11 | 9.85 | 9.488 | 793 | 2014 |
| Kepler-227 c | Sub-Neptune | 3.04 | 9.48 | 54.419 | 443 | 2014 |
Kepler-227 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#426of 1978
top 21.5%
This planet
3.11R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-227 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.11 | 11.21 |
| Mass (M⊕) | 1.00 | 9.85 | 317.83 |
| Density (g/cm³) | 5.51 | 1.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 104.64 | 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 9.49 Earth days (2.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0900 AU.
Transit Fingerprint
Depth
0.062 %
Duration
3.113 h
Impact parameter b
0.820
Rp / R★
0.022344
Transit midpoint (BJD)
2,455,003.5390
Photometric dip
Transit produces a flux drop of 616 ppm lasting ≈ 3.11 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022344
Semi-major axis / stellar radius
24.810
Impact parameter (b)
0.820
Transit mid-time (BJD)
2,455,003.5390
Angular separation (arcsec)
0.08310
Eq. Temperature
793K
(520 °C)
Insolation (S⊕)
104.64
Earth = 1.00
Earth Similarity (ESI)
0.293
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-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
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HD 93963 A c
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Kepler-656 b
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