Key parameters at a glance
- A radius of 13.79 Earth radii
- A mass of 92.17 Earth masses
- Surface gravity around 0.48 g
- An orbital period of 10.291 days
- Semi-major axis 0.0910 AU
- Equilibrium temperature 1,100 K (827 °C)
- Distance from Earth 3,319.62 light-years
- Earth Similarity Index 0.092
- Travel time at Voyager 1 speed 58,541,421 years
Kepler-427 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#539of 1771
top 30.4%
This planet
13.79R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Kepler-427 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.79 | 11.21 |
| Mass (M⊕) | 1.00 | 92.17 | 317.83 |
| Density (g/cm³) | 5.51 | 0.16 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.48 | 2.53 |
| Insolation (S⊕) | 1.00 | 208.72 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 92.170 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 158668572
Gaia DR2
Gaia DR2 2103014626070505344
Gaia DR3
Gaia DR3 2103014626070505344
System
Kepler-427
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.29 Earth days (2.8% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0910 AU.
Transit Fingerprint
Depth
0.966 %
Duration
4.286 h
Impact parameter b
0.090
Rp / R★
0.091300
Transit midpoint (BJD)
2,454,970.0221
Photometric dip
Transit produces a flux drop of 9,656 ppm lasting ≈ 4.29 h.
Extended Orbital Architecture
Planet / star radius ratio
0.091300
Semi-major axis / stellar radius
14.200
Impact parameter (b)
0.090
RV semi-amplitude (K)
29.800 m/s
Transit mid-time (BJD)
2,454,970.0221
Angular separation (arcsec)
0.08940
Eq. Temperature
1,100K
(827 °C)
Insolation (S⊕)
208.72
Earth = 1.00
Earth Similarity (ESI)
0.092
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
H Eacute Brard et al. 2014Instrument
Kepler CCD Array
Publication
2014-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-427
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,800 K — hotter than the Sun (5,778 K)
Estimated Age
7.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.350 R☉
Stellar Mass
0.960 M☉
Metallicity [Fe/H]
-0.19
Extended Stellar Properties
Surface gravity (log g)
4.140 dex
Stellar density
0.400 g/cm³
Systemic radial velocity
-23.94 km/s
Rotational v·sin i
3.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.954 mas
Total Proper Motion
7.237 mas/yr
PM Right Ascension
2.39 mas/yr
PM Declination
-6.83 mas/yr
Galactic Cartesian (pc)
x = 0.226 · y = -0.687 · z = 0.691
Equatorial (J2000)
RA 288.25458° · Dec 43.70484°
Galactic ℓ, b
74.839° · 14.748°
Ecliptic λ, β
302.526° · 65.096°
HTM-20 index
43372666
Similar Worlds
WASP-192 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.79 R⊕ · 1,659.8 ly
WASP-22 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.79 R⊕ · 1,036.0 ly
WASP-95 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.79 R⊕ · 448.6 ly
HATS-33 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.79 R⊕ · 810.4 ly
HD 102956 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.80 R⊕ · 397.6 ly
HD 185269 b
Gas Giant · G-type yellow (Sun-like)
Radius 13.80 R⊕ · 169.6 ly