Key parameters at a glance

A radius of 2.28 Earth radii
A mass of 5.82 Earth masses
Surface gravity around 1.12 g
An orbital period of 96.915 days
Semi-major axis 0.3759 AU
Equilibrium temperature 325 K (52 °C)
Distance from Earth 1,354.72 light-years
Earth Similarity Index 0.730
Travel time at Voyager 1 speed 23,890,398 years

Kepler-1020 b Planet Profile

Physical Specs

Radius

2.28 R⊕

Radius (Jupiter)

0.203 R♃

Mass

5.82 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.70 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.730

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

#1536of 1978

top 77.6%

This planet

2.28R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-763 b 2.28 R⊕ GJ 806 c 2.28 R⊕ DMPP-6 b 2.28 R⊕

Metric	Earth	Kepler-1020 b	Jupiter
Radius (R⊕)	1.00	2.28	11.21
Mass (M⊕)	1.00	5.82	317.83
Density (g/cm³)	5.51	2.70	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	2.34	0.037

Star Catalogue Identifiers

TIC

TIC 63362217

Gaia DR2

Gaia DR2 2128262161823652480

Gaia DR3

Gaia DR3 2128262161823652480

System

Kepler-1020

Percentile among Sub-Neptune cohort

Radius 2.280 R⊕ · percentile 22 / cohort 1978

Mass 5.820 M⊕ · percentile 22 / cohort 1978

Orbital period 96.92 d · percentile 94 / cohort 1946

Distance 415.36 pc · percentile 42 / cohort 1975

ESI 0.730 · percentile 95 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

96.915 days

Semi-major axis

0.3759 AU

Eccentricity

0.000

Inclination

89.71 °

Year Length

A year here lasts approximately 96.92 Earth days (26.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3759 AU.

Transit Fingerprint

Depth

0.086 %

Duration

5.996 h

Impact parameter b

0.311

Rp / R★

0.026245

Transit midpoint (BJD)

2,455,020.0890

Photometric dip

Transit produces a flux drop of 863 ppm lasting ≈ 6.00 h.

Extended Orbital Architecture

Planet / star radius ratio

0.026245

Semi-major axis / stellar radius

120.800

Impact parameter (b)

0.311

Transit mid-time (BJD)

2,455,020.0890

Angular separation (arcsec)

0.90500

Eq. Temperature

325K

(52 °C)

Insolation (S⊕)

2.34

Earth = 1.00

Earth Similarity (ESI)

0.730

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.

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-1020

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,227 K — cooler than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.800 R☉

Stellar Mass

0.870 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.570 dex

Stellar density

1.800 g/cm³

Metallicity ratio

[Fe/H]

Distance

415.36 parsec

Light-years 1,354.72 ly

V-band magnitude

14.21 mag

Voyager-speed travel 23,890,398 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.379 mas

Total Proper Motion

32.223 mas/yr

PM Right Ascension

-10.93 mas/yr

PM Declination

-30.31 mas/yr

Galactic Cartesian (pc)

x = 0.266 · y = -0.637 · z = 0.724

Equatorial (J2000)

RA 292.67247° · Dec 46.37728°

Galactic ℓ, b

78.683° · 13.029°

Ecliptic λ, β

311.923° · 66.547°

HTM-20 index

-957000489