Key parameters at a glance

A radius of 1.33 Earth radii
A mass of 2.33 Earth masses
Surface gravity around 1.32 g
An orbital period of 2.515 days
Semi-major axis 0.0354 AU
Equilibrium temperature 1,217 K (944 °C)
Distance from Earth 1,982.75 light-years
Earth Similarity Index 0.249
Travel time at Voyager 1 speed 34,965,874 years

Kepler-1028 b Planet Profile

Physical Specs

Radius

1.33 R⊕

Radius (Jupiter)

0.119 R♃

Mass

2.33 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.44 g/cm³

Surface Gravity

1.32 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.249

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

#1022of 1176

top 86.8%

This planet

1.33R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-393 c 1.33 R⊕ Kepler-286 d 1.33 R⊕ Kepler-220 e 1.33 R⊕

Metric	Earth	Kepler-1028 b	Jupiter
Radius (R⊕)	1.00	1.33	11.21
Mass (M⊕)	1.00	2.33	317.83
Density (g/cm³)	5.51	5.44	1.33
Surface Gravity (g)	1.00	1.32	2.53
Insolation (S⊕)	1.00	519.64	0.037

Star Catalogue Identifiers

TIC

TIC 416265126

Gaia DR2

Gaia DR2 2132657390834750976

Gaia DR3

Gaia DR3 2132657390834750976

System

Kepler-1028

Percentile among Super-Earth cohort

Radius 1.330 R⊕ · percentile 11 / cohort 1176

Mass 2.330 M⊕ · percentile 11 / cohort 1176

Orbital period 2.51 d · percentile 16 / cohort 1164

Distance 607.92 pc · percentile 55 / cohort 1171

ESI 0.249 · percentile 23 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.515 days

Semi-major axis

0.0354 AU

Eccentricity

0.000

Inclination

88.78 °

Year Length

A year here lasts approximately 2.51 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0354 AU.

Transit Fingerprint

Depth

0.023 %

Duration

1.609 h

Impact parameter b

0.369

Rp / R★

0.014313

Transit midpoint (BJD)

2,454,965.9102

Photometric dip

Transit produces a flux drop of 228 ppm lasting ≈ 1.61 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014313

Semi-major axis / stellar radius

6.000

Impact parameter (b)

0.369

Transit mid-time (BJD)

2,454,965.9102

Angular separation (arcsec)

0.05820

Eq. Temperature

1,217K

(944 °C)

Insolation (S⊕)

519.64

Earth = 1.00

Earth Similarity (ESI)

0.249

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-1028

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,522 K — cooler than the Sun (5,778 K)

Estimated Age

4.68 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.870 R☉

Stellar Mass

0.900 M☉

Metallicity [Fe/H]

-0.09

Extended Stellar Properties

Surface gravity (log g)

4.520 dex

Stellar density

4.315 g/cm³

Metallicity ratio

[Fe/H]

Distance

607.92 parsec

Light-years 1,982.75 ly

V-band magnitude

14.61 mag

Voyager-speed travel 34,965,874 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.616 mas

Total Proper Motion

19.197 mas/yr

PM Right Ascension

-1.77 mas/yr

PM Declination

19.12 mas/yr

Galactic Cartesian (pc)

x = 0.217 · y = -0.608 · z = 0.764

Equatorial (J2000)

RA 289.59310° · Dec 49.78124°

Galactic ℓ, b

81.009° · 16.308°

Ecliptic λ, β

310.400° · 70.484°

HTM-20 index

945931145