Key parameters at a glance

A radius of 1.71 Earth radii
A mass of 3.58 Earth masses
Surface gravity around 1.22 g
An orbital period of 4.645 days
Semi-major axis 0.0550 AU
Equilibrium temperature 1,209 K (936 °C)
Distance from Earth 3,374.38 light-years
Earth Similarity Index 0.232
Travel time at Voyager 1 speed 59,507,141 years

Kepler-1818 b Planet Profile

Physical Specs

Radius

1.71 R⊕

Radius (Jupiter)

0.153 R♃

Mass

3.58 M⊕

Mass (Jupiter)

0.011 M♃

Density

3.91 g/cm³

Surface Gravity

1.22 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.232

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#384of 1176

top 32.6%

This planet

1.71R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-160 b 1.72 R⊕ Kepler-1713 b 1.72 R⊕ TOI-260 b 1.71 R⊕

Metric	Earth	Kepler-1818 b	Jupiter
Radius (R⊕)	1.00	1.71	11.21
Mass (M⊕)	1.00	3.58	317.83
Density (g/cm³)	5.51	3.91	1.33
Surface Gravity (g)	1.00	1.22	2.53
Insolation (S⊕)	1.00	504.23	0.037

Star Catalogue Identifiers

TIC

TIC 120251654

Gaia DR2

Gaia DR2 2103614444020842752

Gaia DR3

Gaia DR3 2103614444020842752

System

Kepler-1818

Percentile among Super-Earth cohort

Radius 1.714 R⊕ · percentile 67 / cohort 1176

Mass 3.580 M⊕ · percentile 61 / cohort 1176

Orbital period 4.64 d · percentile 38 / cohort 1164

Distance 1,034.59 pc · percentile 82 / cohort 1171

ESI 0.232 · percentile 19 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

4.645 days

Semi-major axis

0.0550 AU

Eccentricity

0.000

Inclination

88.31 °

Year Length

A year here lasts approximately 4.64 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0550 AU.

Transit Fingerprint

Depth

0.015 %

Duration

3.366 h

Impact parameter b

0.851

Rp / R★

0.011202

Transit midpoint (BJD)

2,454,969.0266

Photometric dip

Transit produces a flux drop of 147 ppm lasting ≈ 3.37 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011202

Semi-major axis / stellar radius

4.960

Impact parameter (b)

0.851

Transit mid-time (BJD)

2,454,969.0266

Angular separation (arcsec)

0.05320

Eq. Temperature

1,209K

(936 °C)

Insolation (S⊕)

504.23

Earth = 1.00

Earth Similarity (ESI)

0.232

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1818

Spectral Class

F-type yellow-white

Effective Temperature

6,047 K — hotter than the Sun (5,778 K)

Estimated Age

5.40 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.129 R☉

Stellar Mass

1.021 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

4.343 dex

Stellar density

0.929 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,034.59 parsec

Light-years 3,374.38 ly

V-band magnitude

14.51 mag

Voyager-speed travel 59,507,141 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

0.938 mas

Total Proper Motion

13.525 mas/yr

PM Right Ascension

-4.77 mas/yr

PM Declination

-12.65 mas/yr

Galactic Cartesian (pc)

x = 0.188 · y = -0.736 · z = 0.650

Equatorial (J2000)

RA 284.32849° · Dec 40.56887°

Galactic ℓ, b

70.669° · 16.214°

Ecliptic λ, β

294.286° · 62.805°

HTM-20 index

-454465486