Key parameters at a glance

A radius of 1.56 Earth radii
A mass of 3.05 Earth masses
Surface gravity around 1.25 g
An orbital period of 14.256 days
Semi-major axis 0.1187 AU
Equilibrium temperature 797 K (524 °C)
Distance from Earth 5,537.51 light-years
Earth Similarity Index 0.375
Travel time at Voyager 1 speed 97,653,969 years

Kepler-1426 b Planet Profile

Physical Specs

Radius

1.56 R⊕

Radius (Jupiter)

0.139 R♃

Mass

3.05 M⊕

Mass (Jupiter)

0.010 M♃

Density

4.41 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.375

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#636of 1176

top 54.0%

This planet

1.56R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-338 e 1.56 R⊕ Kepler-402 c 1.56 R⊕ Kepler-309 b 1.56 R⊕

Metric	Earth	Kepler-1426 b	Jupiter
Radius (R⊕)	1.00	1.56	11.21
Mass (M⊕)	1.00	3.05	317.83
Density (g/cm³)	5.51	4.41	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	95.22	0.037

Star Catalogue Identifiers

TIC

TIC 26656435

Gaia DR2

Gaia DR2 2129811201907123840

Gaia DR3

Gaia DR3 2129811201907123840

System

Kepler-1426

Percentile among Super-Earth cohort

Radius 1.560 R⊕ · percentile 45 / cohort 1176

Mass 3.050 M⊕ · percentile 41 / cohort 1176

Orbital period 14.26 d · percentile 76 / cohort 1164

Distance 1,697.81 pc · percentile 96 / cohort 1171

ESI 0.375 · percentile 56 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

14.256 days

Semi-major axis

0.1187 AU

Eccentricity

0.000

Inclination

85.33 °

Year Length

A year here lasts approximately 14.26 Earth days (3.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1187 AU.

Transit Fingerprint

Depth

0.021 %

Duration

4.389 h

Impact parameter b

0.357

Rp / R★

0.013629

Transit midpoint (BJD)

2,454,966.4050

Photometric dip

Transit produces a flux drop of 206 ppm lasting ≈ 4.39 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013629

Semi-major axis / stellar radius

8.900

Impact parameter (b)

0.357

Transit mid-time (BJD)

2,454,966.4050

Angular separation (arcsec)

0.06990

Eq. Temperature

797K

(524 °C)

Insolation (S⊕)

95.22

Earth = 1.00

Earth Similarity (ESI)

0.375

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

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1426

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,831 K — hotter than the Sun (5,778 K)

Estimated Age

4.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.020 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

1.215 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,697.81 parsec

Light-years 5,537.51 ly

V-band magnitude

15.46 mag

Voyager-speed travel 97,653,969 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.530 mas

Total Proper Motion

8.464 mas/yr

PM Right Ascension

-2.80 mas/yr

PM Declination

-7.99 mas/yr

Galactic Cartesian (pc)

x = 0.249 · y = -0.601 · z = 0.759

Equatorial (J2000)

RA 292.54571° · Dec 49.41690°

Galactic ℓ, b

81.471° · 14.412°

Ecliptic λ, β

315.028° · 69.356°

HTM-20 index

804394705