Key parameters at a glance

A radius of 1.47 Earth radii
A mass of 2.76 Earth masses
Surface gravity around 1.28 g
An orbital period of 5.866 days
Semi-major axis 0.0648 AU
Equilibrium temperature 1,064 K (791 °C)
Distance from Earth 5,294.29 light-years
Earth Similarity Index 0.281
Travel time at Voyager 1 speed 93,364,881 years

Kepler-1431 b Planet Profile

Physical Specs

Radius

1.47 R⊕

Radius (Jupiter)

0.131 R♃

Mass

2.76 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.77 g/cm³

Surface Gravity

1.28 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.281

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

#802of 1176

top 68.1%

This planet

1.47R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-292 c 1.47 R⊕ Kepler-10 b 1.47 R⊕ Kepler-137 b 1.47 R⊕

Metric	Earth	Kepler-1431 b	Jupiter
Radius (R⊕)	1.00	1.47	11.21
Mass (M⊕)	1.00	2.76	317.83
Density (g/cm³)	5.51	4.77	1.33
Surface Gravity (g)	1.00	1.28	2.53
Insolation (S⊕)	1.00	469.82	0.037

Star Catalogue Identifiers

TIC

TIC 26657021

Gaia DR2

Gaia DR2 2129847554510913536

Gaia DR3

Gaia DR3 2129847554510913536

System

Kepler-1431

Percentile among Super-Earth cohort

Radius 1.470 R⊕ · percentile 31 / cohort 1176

Mass 2.760 M⊕ · percentile 29 / cohort 1176

Orbital period 5.87 d · percentile 46 / cohort 1164

Distance 1,623.24 pc · percentile 96 / cohort 1171

ESI 0.281 · percentile 31 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.866 days

Semi-major axis

0.0648 AU

Eccentricity

0.000

Inclination

86.80 °

Year Length

A year here lasts approximately 5.87 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0648 AU.

Transit Fingerprint

Depth

0.018 %

Duration

3.978 h

Impact parameter b

0.302

Rp / R★

0.012877

Transit midpoint (BJD)

2,454,969.3560

Photometric dip

Transit produces a flux drop of 183 ppm lasting ≈ 3.98 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012877

Semi-major axis / stellar radius

6.100

Impact parameter (b)

0.302

Transit mid-time (BJD)

2,454,969.3560

Angular separation (arcsec)

0.03990

Eq. Temperature

1,064K

(791 °C)

Insolation (S⊕)

469.82

Earth = 1.00

Earth Similarity (ESI)

0.281

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1431

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,806 K — hotter than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.030 R☉

Stellar Mass

1.030 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.420 dex

Stellar density

0.714 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,623.24 parsec

Light-years 5,294.29 ly

V-band magnitude

15.40 mag

Voyager-speed travel 93,364,881 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

0.587 mas

Total Proper Motion

6.782 mas/yr

PM Right Ascension

-2.17 mas/yr

PM Declination

-6.42 mas/yr

Galactic Cartesian (pc)

x = 0.248 · y = -0.595 · z = 0.765

Equatorial (J2000)

RA 292.65839° · Dec 49.86515°

Galactic ℓ, b

81.922° · 14.535°

Ecliptic λ, β

315.777° · 69.727°

HTM-20 index

647347875