Key parameters at a glance
- A radius of 2.07 Earth radii
- A mass of 11.87 Earth masses
- Surface gravity around 2.78 g
- An orbital period of 49.357 days
- Semi-major axis 0.2868 AU
- Equilibrium temperature 637 K (364 °C)
- Distance from Earth 1,559.00 light-years
- Earth Similarity Index 0.424
- Travel time at Voyager 1 speed 27,492,956 years
2 siblings around Kepler-92
Kepler-92 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-92 b | Sub-Neptune | 3.51 | 64.30 | 13.749 | 975 | 2013 |
| Kepler-92 c | Sub-Neptune | 2.60 | 6.10 | 26.723 | 781 | 2013 |
| Kepler-92 d this | Sub-Neptune | 2.07 | 11.87 | 49.357 | 637 | 2015 |
Kepler-92 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1871of 1978
top 94.5%
This planet
2.07R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-92 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.07 | 11.21 |
| Mass (M⊕) | 1.00 | 11.87 | 317.83 |
| Density (g/cm³) | 5.51 | 7.46 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.78 | 2.53 |
| Insolation (S⊕) | 1.00 | 46.84 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 11.867 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 121943724
Gaia DR2
Gaia DR2 2102224661326132864
Gaia DR3
Gaia DR3 2102224661326132864
System
Kepler-92
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 49.36 Earth days (13.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2868 AU.
Transit Fingerprint
Depth
0.014 %
Duration
10.916 h
Impact parameter b
0.677
Rp / R★
0.011060
Transit midpoint (BJD)
2,454,967.2968
Photometric dip
Transit produces a flux drop of 138 ppm lasting ≈ 10.92 h.
Extended Orbital Architecture
Planet / star radius ratio
0.011060
Semi-major axis / stellar radius
24.910
Impact parameter (b)
0.677
RV semi-amplitude (K)
1.746 m/s
Transit mid-time (BJD)
2,454,967.2968
Angular separation (arcsec)
0.60000
Eq. Temperature
637K
(364 °C)
Insolation (S⊕)
46.84
Earth = 1.00
Earth Similarity (ESI)
0.424
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
Van Eylen Albrecht 2015Instrument
Kepler CCD Array
Publication
2015-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2015 at Kepler (12 shown).
Host System: Kepler-92
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,904 K — hotter than the Sun (5,778 K)
Estimated Age
3.98 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.817 R☉
Stellar Mass
1.070 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
3.949 dex
Stellar density
0.251 g/cm³
Systemic radial velocity
-41.31 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 14 bands
Astrometric Data
Parallax
2.063 mas
Total Proper Motion
14.718 mas/yr
PM Right Ascension
-0.13 mas/yr
PM Declination
14.72 mas/yr
Galactic Cartesian (pc)
x = 0.245 · y = -0.707 · z = 0.663
Equatorial (J2000)
RA 289.08606° · Dec 41.56302°
Galactic ℓ, b
73.082° · 13.314°
Ecliptic λ, β
302.442° · 62.869°
HTM-20 index
-1521422322
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Kepler-969 b
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