Key parameters at a glance

A radius of 1.10 Earth radii
A mass of 1.37 Earth masses
Surface gravity around 1.13 g
An orbital period of 0.969 days
Semi-major axis 0.0197 AU
Equilibrium temperature 1,844 K (1571 °C)
Distance from Earth 3,979.10 light-years
Earth Similarity Index 0.158
Travel time at Voyager 1 speed 70,171,481 years

Kepler-1427 b Planet Profile

Physical Specs

Radius

1.10 R⊕

Radius (Jupiter)

0.098 R♃

Mass

1.37 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.66 g/cm³

Surface Gravity

1.13 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.158

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

#224of 570

top 39.1%

This planet

1.10R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-392 c 1.10 R⊕ Kepler-59 b 1.10 R⊕ K2-239 d 1.10 R⊕

Metric	Earth	Kepler-1427 b	Jupiter
Radius (R⊕)	1.00	1.10	11.21
Mass (M⊕)	1.00	1.37	317.83
Density (g/cm³)	5.51	5.66	1.33
Surface Gravity (g)	1.00	1.13	2.53
Insolation (S⊕)	1.00	2,730.51	0.037

Star Catalogue Identifiers

TIC

TIC 271665352

Gaia DR2

Gaia DR2 2079963811471971584

Gaia DR3

Gaia DR3 2079963811474106496

System

Kepler-1427

Percentile among Rocky Terrestrial cohort

Radius 1.100 R⊕ · percentile 59 / cohort 570

Mass 1.370 M⊕ · percentile 54 / cohort 570

Orbital period 0.97 d · percentile 11 / cohort 567

Distance 1,220.00 pc · percentile 96 / cohort 566

ESI 0.158 · percentile 6 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.969 days

Semi-major axis

0.0197 AU

Eccentricity

0.000

Inclination

89.25 °

Year Length

A year here lasts roughly 23.3 hours long on a nearly circular orbit at a mean orbital distance of 0.0197 AU.

Transit Fingerprint

Depth

0.012 %

Duration

1.622 h

Impact parameter b

0.065

Rp / R★

0.009896

Transit midpoint (BJD)

2,454,965.4295

Photometric dip

Transit produces a flux drop of 119 ppm lasting ≈ 1.62 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009896

Semi-major axis / stellar radius

4.954

Impact parameter (b)

0.065

Transit mid-time (BJD)

2,454,965.4295

Angular separation (arcsec)

0.01610

Eq. Temperature

1,844K

(1571 °C)

Insolation (S⊕)

2,730.51

Earth = 1.00

Earth Similarity (ESI)

0.158

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-1427

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,793 K — hotter than the Sun (5,778 K)

Estimated Age

4.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.010 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.440 dex

Stellar density

2.449 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,220.00 parsec

Light-years 3,979.10 ly

V-band magnitude

15.60 mag

Voyager-speed travel 70,171,481 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Total Proper Motion

5.443 mas/yr

PM Right Ascension

-3.09 mas/yr

PM Declination

-4.48 mas/yr

Galactic Cartesian (pc)

x = 0.302 · y = -0.638 · z = 0.709

Equatorial (J2000)

RA 295.34965° · Dec 45.11454°

Galactic ℓ, b

78.393° · 10.792°

Ecliptic λ, β

314.887° · 64.653°

HTM-20 index

-1169914192