Key parameters at a glance

A radius of 1.64 Earth radii
A mass of 3.33 Earth masses
Surface gravity around 1.24 g
An orbital period of 10.676 days
Semi-major axis 0.1105 AU
Equilibrium temperature 1,049 K (776 °C)
Distance from Earth 4,991.23 light-years
Earth Similarity Index 0.276
Travel time at Voyager 1 speed 88,020,345 years

Kepler-1428 b Planet Profile

Physical Specs

Radius

1.64 R⊕

Radius (Jupiter)

0.146 R♃

Mass

3.33 M⊕

Mass (Jupiter)

0.011 M♃

Density

4.15 g/cm³

Surface Gravity

1.24 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.276

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

#495of 1176

top 42.0%

This planet

1.64R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-46 d 1.64 R⊕ Kepler-179 b 1.64 R⊕ Kepler-247 b 1.64 R⊕

Metric	Earth	Kepler-1428 b	Jupiter
Radius (R⊕)	1.00	1.64	11.21
Mass (M⊕)	1.00	3.33	317.83
Density (g/cm³)	5.51	4.15	1.33
Surface Gravity (g)	1.00	1.24	2.53
Insolation (S⊕)	1.00	817.58	0.037

Star Catalogue Identifiers

TIC

TIC 28234022

Gaia DR2

Gaia DR2 2087167708577798784

Gaia DR3

Gaia DR3 2087167708577798784

System

Kepler-1428

Percentile among Super-Earth cohort

Radius 1.640 R⊕ · percentile 56 / cohort 1176

Mass 3.330 M⊕ · percentile 51 / cohort 1176

Orbital period 10.68 d · percentile 66 / cohort 1164

Distance 1,530.32 pc · percentile 95 / cohort 1171

ESI 0.276 · percentile 31 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

10.676 days

Semi-major axis

0.1105 AU

Eccentricity

0.000

Inclination

88.60 °

Year Length

A year here lasts approximately 10.68 Earth days (2.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1105 AU.

Transit Fingerprint

Depth

0.014 %

Duration

4.549 h

Impact parameter b

0.403

Rp / R★

0.011014

Transit midpoint (BJD)

2,454,973.5924

Photometric dip

Transit produces a flux drop of 142 ppm lasting ≈ 4.55 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011014

Semi-major axis / stellar radius

17.810

Impact parameter (b)

0.403

Transit mid-time (BJD)

2,454,973.5924

Angular separation (arcsec)

0.07220

Eq. Temperature

1,049K

(776 °C)

Insolation (S⊕)

817.58

Earth = 1.00

Earth Similarity (ESI)

0.276

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-1428

Spectral Class

F-type yellow-white

Effective Temperature

6,184 K — hotter than the Sun (5,778 K)

Estimated Age

2.04 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.360 R☉

Stellar Mass

1.280 M☉

Metallicity [Fe/H]

0.35

Extended Stellar Properties

Surface gravity (log g)

4.280 dex

Stellar density

0.110 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,530.32 parsec

Light-years 4,991.23 ly

V-band magnitude

13.76 mag

Voyager-speed travel 88,020,345 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Parallax

0.625 mas

Total Proper Motion

6.551 mas/yr

PM Right Ascension

-3.35 mas/yr

PM Declination

-5.63 mas/yr

Galactic Cartesian (pc)

x = 0.301 · y = -0.574 · z = 0.761

Equatorial (J2000)

RA 297.64226° · Dec 49.59496°

Galactic ℓ, b

83.165° · 11.539°

Ecliptic λ, β

323.325° · 67.980°

HTM-20 index

1467064619