Key parameters at a glance

A radius of 2.60 Earth radii
A mass of 6.10 Earth masses
Surface gravity around 0.90 g
An orbital period of 26.723 days
Semi-major axis 0.1905 AU
Equilibrium temperature 781 K (508 °C)
Distance from Earth 1,559.00 light-years
Earth Similarity Index 0.365
Travel time at Voyager 1 speed 27,492,956 years

2 siblings around Kepler-92

Kepler-92 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-92 b	Sub-Neptune	3.51	64.30	13.749	975	2013
Kepler-92 c this	Sub-Neptune	2.60	6.10	26.723	781	2013
Kepler-92 d	Sub-Neptune	2.07	11.87	49.357	637	2015

Kepler-92 c Planet Profile

Physical Specs

Radius

2.60 R⊕

Radius (Jupiter)

0.232 R♃

Mass

6.10 M⊕

Mass (Jupiter)

0.019 M♃

Density

4.75 g/cm³

Surface Gravity

0.90 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.365

HZ Position Inner

Controversial No

Discovery

Year 2013

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1017of 1978

top 51.4%

This planet

2.60R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-155 c 2.60 R⊕ Kepler-84 e 2.60 R⊕ Kepler-115 c 2.60 R⊕

Metric	Earth	Kepler-92 c	Jupiter
Radius (R⊕)	1.00	2.60	11.21
Mass (M⊕)	1.00	6.10	317.83
Density (g/cm³)	5.51	4.75	1.33
Surface Gravity (g)	1.00	0.90	2.53
Insolation (S⊕)	1.00	106.21	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	6.100 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	12.701 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

Radius 2.600 R⊕ · percentile 48 / cohort 1978

Mass 6.100 M⊕ · percentile 27 / cohort 1978

Orbital period 26.72 d · percentile 71 / cohort 1946

Distance 477.99 pc · percentile 46 / cohort 1975

ESI 0.365 · percentile 44 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

26.723 days

Semi-major axis

0.1905 AU

Eccentricity

0.040

Inclination

89.92 °

Year Length

A year here lasts approximately 26.72 Earth days (7.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1905 AU.

Transit Fingerprint

Depth

0.019 %

Duration

8.510 h

Impact parameter b

0.732

Rp / R★

0.015600

Transit midpoint (BJD)

2,454,980.9512

Photometric dip

Transit produces a flux drop of 195 ppm lasting ≈ 8.51 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015600

Semi-major axis / stellar radius

24.312

Impact parameter (b)

0.732

RV semi-amplitude (K)

2.292 m/s

Transit mid-time (BJD)

2,454,980.9512

Angular separation (arcsec)

0.39900

Eq. Temperature

781K

(508 °C)

Insolation (S⊕)

106.21

Earth = 1.00

Earth Similarity (ESI)

0.365

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

Xie 2014

Instrument

Kepler CCD Array

Publication

2014-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2013 at Kepler (12 shown).

Kepler-69 c · Super-Earth Kepler-61 b · Sub-Neptune Kepler-62 e · Super-Earth KOI-351 f · Sub-Neptune Kepler-62 f · Super-Earth KOI-351 e · Sub-Neptune Kepler-1704 b · Gas Giant Kepler-37 d · Sub-Neptune Kepler-282 e · Sub-Neptune KOI-351 h · Gas Giant KOI-351 d · Sub-Neptune Kepler-114 c · Super-Earth

Host System: Kepler-92

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,883 K — hotter than the Sun (5,778 K)

Estimated Age

3.98 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.700 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.050 dex

Stellar density

0.240 g/cm³

Systemic radial velocity

-41.31 km/s

Metallicity ratio

[M/H]

Distance

477.99 parsec

Light-years 1,559.00 ly

V-band magnitude

11.67 mag

Voyager-speed travel 27,492,956 yr

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