Key parameters at a glance
- A radius of 2.64 Earth radii
- A mass of 7.46 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 48.630 days
- Semi-major axis 0.2800 AU
- Equilibrium temperature 590 K (317 °C)
- Distance from Earth 1,150.66 light-years
- Earth Similarity Index 0.418
- Travel time at Voyager 1 speed 20,291,867 years
2 siblings around Kepler-127
Kepler-127 d 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 | Sub-Neptune | 2.66 | 7.56 | 29.393 | 698 | 2014 |
| Kepler-127 d this | Sub-Neptune | 2.64 | 7.46 | 48.630 | 590 | 2014 |
Kepler-127 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#958of 1978
top 48.4%
This planet
2.64R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-127 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.64 | 11.21 |
| Mass (M⊕) | 1.00 | 7.46 | 317.83 |
| Density (g/cm³) | 5.51 | 2.23 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 31.52 | 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 48.63 Earth days (13.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2800 AU.
Transit Fingerprint
Depth
0.035 %
Duration
7.018 h
Impact parameter b
0.620
Rp / R★
0.018040
Transit midpoint (BJD)
2,455,005.5471
Photometric dip
Transit produces a flux drop of 352 ppm lasting ≈ 7.02 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018040
Semi-major axis / stellar radius
53.480
Impact parameter (b)
0.620
Transit mid-time (BJD)
2,455,005.5471
Angular separation (arcsec)
0.79400
Eq. Temperature
590K
(317 °C)
Insolation (S⊕)
31.52
Earth = 1.00
Earth Similarity (ESI)
0.418
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-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-635 b
Sub-Neptune · F-type yellow-white
Radius 2.64 R⊕ · 3,721.7 ly
TOI-6054.01
Sub-Neptune · F-type yellow-white
Radius 2.64 R⊕ · 259.0 ly
Kepler-1941 b
Sub-Neptune · F-type yellow-white
Radius 2.65 R⊕ · 4,874.0 ly
Kepler-145 b
Sub-Neptune · F-type yellow-white
Radius 2.65 R⊕ · 1,848.8 ly
Kepler-1054 b
Sub-Neptune · F-type yellow-white
Radius 2.63 R⊕ · 3,556.8 ly
Kepler-616 d
Sub-Neptune · F-type yellow-white
Radius 2.65 R⊕ · 3,084.7 ly