Key parameters at a glance
- A radius of 2.66 Earth radii
- A mass of 7.56 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 29.393 days
- Semi-major axis 0.2000 AU
- Equilibrium temperature 698 K (425 °C)
- Distance from Earth 1,150.66 light-years
- Earth Similarity Index 0.355
- Travel time at Voyager 1 speed 20,291,867 years
2 siblings around Kepler-127
Kepler-127 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-127 b | Super-Earth | 1.40 | 2.54 | 14.436 | 884 | 2014 |
| Kepler-127 c this | Sub-Neptune | 2.66 | 7.56 | 29.393 | 698 | 2014 |
| Kepler-127 d | Sub-Neptune | 2.64 | 7.46 | 48.630 | 590 | 2014 |
Kepler-127 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#928of 1978
top 46.9%
This planet
2.66R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-127 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.66 | 11.21 |
| Mass (M⊕) | 1.00 | 7.56 | 317.83 |
| Density (g/cm³) | 5.51 | 2.21 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 61.69 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 164881786
Gaia DR2
Gaia DR2 2107266570672734592
Gaia DR3
Gaia DR3 2107266570672734592
System
Kepler-127
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 29.39 Earth days (8.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2000 AU.
Transit Fingerprint
Depth
0.032 %
Duration
7.104 h
Impact parameter b
0.770
Rp / R★
0.016780
Transit midpoint (BJD)
2,455,042.0671
Photometric dip
Transit produces a flux drop of 318 ppm lasting ≈ 7.10 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016780
Semi-major axis / stellar radius
32.190
Impact parameter (b)
0.770
Transit mid-time (BJD)
2,455,042.0671
Angular separation (arcsec)
0.56700
Eq. Temperature
698K
(425 °C)
Insolation (S⊕)
61.69
Earth = 1.00
Earth Similarity (ESI)
0.355
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-127
Spectral Class
F-type yellow-white
Effective Temperature
6,106 K — hotter than the Sun (5,778 K)
Estimated Age
2.69 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.359 R☉
Stellar Mass
1.248 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.265 dex
Stellar density
0.480 g/cm³
Systemic radial velocity
-21.16 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.806 mas
Total Proper Motion
20.887 mas/yr
PM Right Ascension
-1.48 mas/yr
PM Declination
20.83 mas/yr
Galactic Cartesian (pc)
x = 0.182 · y = -0.670 · z = 0.720
Equatorial (J2000)
RA 285.18994° · Dec 46.02806°
Galactic ℓ, b
76.216° · 17.640°
Ecliptic λ, β
298.975° · 67.945°
HTM-20 index
-1397135075
Similar Worlds
Kepler-346 b
Sub-Neptune · F-type yellow-white
Radius 2.66 R⊕ · 3,209.7 ly
Kepler-1551 b
Sub-Neptune · F-type yellow-white
Radius 2.66 R⊕ · 4,774.0 ly
KOI-351 e
Sub-Neptune · F-type yellow-white
Radius 2.66 R⊕ · 2,766.6 ly
Kepler-880 b
Sub-Neptune · F-type yellow-white
Radius 2.66 R⊕ · 1,961.3 ly
TOI-3353.01
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Kepler-1931 b
Sub-Neptune · F-type yellow-white
Radius 2.65 R⊕ · 2,022.5 ly