Key parameters at a glance

A radius of 0.94 Earth radii
A mass of 0.78 Earth masses
Surface gravity around 0.88 g
An orbital period of 14.454 days
Semi-major axis 0.1144 AU
Equilibrium temperature 676 K (403 °C)
Distance from Earth 2,817.57 light-years
Earth Similarity Index 0.477
Travel time at Voyager 1 speed 49,687,908 years

Kepler-1425 b Planet Profile

Physical Specs

Radius

0.94 R⊕

Radius (Jupiter)

0.084 R♃

Mass

0.78 M⊕

Mass (Jupiter)

0.002 M♃

Density

5.15 g/cm³

Surface Gravity

0.88 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.477

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

#384of 570

top 67.2%

This planet

0.94R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1438 b 0.94 R⊕ Kepler-1572 b 0.94 R⊕ Kepler-1169 b 0.94 R⊕

Metric	Earth	Kepler-1425 b	Jupiter
Radius (R⊕)	1.00	0.94	11.21
Mass (M⊕)	1.00	0.78	317.83
Density (g/cm³)	5.51	5.15	1.33
Surface Gravity (g)	1.00	0.88	2.53
Insolation (S⊕)	1.00	216.41	0.037

Star Catalogue Identifiers

TIC

TIC 271347291

Gaia DR2

Gaia DR2 2077967957353259136

Gaia DR3

Gaia DR3 2077967957353259136

System

Kepler-1425

Percentile among Rocky Terrestrial cohort

Radius 0.940 R⊕ · percentile 32 / cohort 570

Mass 0.779 M⊕ · percentile 28 / cohort 570

Orbital period 14.45 d · percentile 87 / cohort 567

Distance 863.87 pc · percentile 89 / cohort 566

ESI 0.477 · percentile 68 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

14.454 days

Semi-major axis

0.1144 AU

Eccentricity

0.000

Inclination

87.74 °

Year Length

A year here lasts approximately 14.45 Earth days (4.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1143 AU.

Transit Fingerprint

Depth

0.008 %

Duration

7.095 h

Impact parameter b

0.522

Rp / R★

0.009204

Transit midpoint (BJD)

2,454,968.4467

Photometric dip

Transit produces a flux drop of 80 ppm lasting ≈ 7.10 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009204

Semi-major axis / stellar radius

10.120

Impact parameter (b)

0.522

Transit mid-time (BJD)

2,454,968.4467

Angular separation (arcsec)

0.13200

Eq. Temperature

676K

(403 °C)

Insolation (S⊕)

216.41

Earth = 1.00

Earth Similarity (ESI)

0.477

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-1425

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,718 K — cooler than the Sun (5,778 K)

Estimated Age

4.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.950 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

0.210 g/cm³

Metallicity ratio

[Fe/H]

Distance

863.87 parsec

Light-years 2,817.57 ly

V-band magnitude

13.68 mag

Voyager-speed travel 49,687,908 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.129 mas

Total Proper Motion

0.533 mas/yr

PM Right Ascension

0.03 mas/yr

PM Declination

0.53 mas/yr

Galactic Cartesian (pc)

x = 0.308 · y = -0.663 · z = 0.682

Equatorial (J2000)

RA 294.95104° · Dec 43.01243°

Galactic ℓ, b

76.367° · 10.063°

Ecliptic λ, β

312.472° · 62.820°

HTM-20 index

-1458499914