Key parameters at a glance

A radius of 2.78 Earth radii
A mass of 26.21 Earth masses
Surface gravity around 3.39 g
An orbital period of 18.998 days
Semi-major axis 0.1380 AU
Equilibrium temperature 792 K (519 °C)
Distance from Earth 3,773.01 light-years
Earth Similarity Index 0.184
Travel time at Voyager 1 speed 66,536,943 years

3 siblings around Kepler-24

Kepler-24 e shares its host star with 3 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-24 d	Super-Earth	1.67	293.96	4.244	1,305	2014
Kepler-24 b	Sub-Neptune	2.35	11.14	8.140	1,050	2011
Kepler-24 c	Sub-Neptune	2.51	9.99	12.330	915	2011
Kepler-24 e this	Sub-Neptune	2.78	26.21	18.998	792	2014

Kepler-24 e Planet Profile

Physical Specs

Radius

2.78 R⊕

Radius (Jupiter)

0.248 R♃

Mass

26.21 M⊕

Mass (Jupiter)

0.082 M♃

Density

0.31 g/cm³

Surface Gravity

3.39 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.184

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#768of 1978

top 38.8%

This planet

2.78R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-58 b 2.78 R⊕ Kepler-531 b 2.78 R⊕ K2-284 b 2.78 R⊕

Metric	Earth	Kepler-24 e	Jupiter
Radius (R⊕)	1.00	2.78	11.21
Mass (M⊕)	1.00	26.21	317.83
Density (g/cm³)	5.51	0.31	1.33
Surface Gravity (g)	1.00	3.39	2.53
Insolation (S⊕)	1.00	81.51	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	26.212 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 122376177

Gaia DR2

Gaia DR2 2052823535171095296

Gaia DR3

Gaia DR3 2052823535171095296

System

Kepler-24

Percentile among Sub-Neptune cohort

Radius 2.780 R⊕ · percentile 61 / cohort 1978

Mass 26.212 M⊕ · percentile 96 / cohort 1978

Orbital period 19.00 d · percentile 60 / cohort 1946

Distance 1,156.81 pc · percentile 85 / cohort 1975

ESI 0.184 · percentile 5 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

18.998 days

Semi-major axis

0.1380 AU

Eccentricity

0.000

Inclination

79.72 °

Year Length

A year here lasts approximately 19.00 Earth days (5.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1380 AU.

Transit Fingerprint

Depth

0.047 %

Duration

2.963 h

Impact parameter b

0.100

Rp / R★

0.022246

Transit midpoint (BJD)

2,454,977.7436

Photometric dip

Transit produces a flux drop of 468 ppm lasting ≈ 2.96 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022246

Semi-major axis / stellar radius

29.596

Impact parameter (b)

0.100

Transit mid-time (BJD)

2,454,977.7436

Angular separation (arcsec)

0.11900

Eq. Temperature

792K

(519 °C)

Insolation (S⊕)

81.51

Earth = 1.00

Earth Similarity (ESI)

0.184

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. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-24

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,897 K — hotter than the Sun (5,778 K)

Estimated Age

3.02 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.289 R☉

Stellar Mass

1.046 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.200 dex

Stellar density

0.011 g/cm³

Metallicity ratio

[M/H]

Distance

1,156.81 parsec

Light-years 3,773.01 ly

V-band magnitude

15.04 mag

Voyager-speed travel 66,536,943 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.836 mas

Total Proper Motion

2.879 mas/yr

PM Right Ascension

-2.23 mas/yr

PM Declination

-1.82 mas/yr

Galactic Cartesian (pc)

x = 0.274 · y = -0.735 · z = 0.620

Equatorial (J2000)

RA 290.41326° · Dec 38.34373°

Galactic ℓ, b

70.550° · 11.018°

Ecliptic λ, β

302.604° · 59.493°

HTM-20 index

1799876032