Key parameters at a glance

A radius of 2.95 Earth radii
A mass of 9.03 Earth masses
Surface gravity around 1.03 g
An orbital period of 30.254 days
Semi-major axis 0.2043 AU
Equilibrium temperature 660 K (387 °C)
Distance from Earth 2,889.46 light-years
Earth Similarity Index 0.359
Travel time at Voyager 1 speed 50,955,596 years

Kepler-1920 b Planet Profile

Physical Specs

Radius

2.95 R⊕

Radius (Jupiter)

0.264 R♃

Mass

9.03 M⊕

Mass (Jupiter)

0.028 M♃

Density

1.92 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.359

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

#554of 1978

top 28.0%

This planet

2.95R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1728 b 2.96 R⊕ TOI-2459 b 2.95 R⊕ TOI-1751 b 2.95 R⊕

Metric	Earth	Kepler-1920 b	Jupiter
Radius (R⊕)	1.00	2.95	11.21
Mass (M⊕)	1.00	9.03	317.83
Density (g/cm³)	5.51	1.92	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	44.87	0.037

Star Catalogue Identifiers

TIC

TIC 122716838

Gaia DR2

Gaia DR2 2052942900903300352

Gaia DR3

Gaia DR3 2052942900903300352

System

Kepler-1920

Percentile among Sub-Neptune cohort

Radius 2.954 R⊕ · percentile 72 / cohort 1978

Mass 9.030 M⊕ · percentile 66 / cohort 1978

Orbital period 30.25 d · percentile 74 / cohort 1946

Distance 885.91 pc · percentile 71 / cohort 1975

ESI 0.359 · percentile 43 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

30.254 days

Semi-major axis

0.2043 AU

Eccentricity

0.000

Inclination

89.94 °

Year Length

A year here lasts approximately 30.25 Earth days (8.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2043 AU.

Transit Fingerprint

Depth

0.058 %

Duration

2.088 h

Impact parameter b

0.114

Rp / R★

0.022050

Transit midpoint (BJD)

2,454,969.6377

Photometric dip

Transit produces a flux drop of 577 ppm lasting ≈ 2.09 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022050

Semi-major axis / stellar radius

112.500

Impact parameter (b)

0.114

Transit mid-time (BJD)

2,454,969.6377

Angular separation (arcsec)

0.23100

Eq. Temperature

660K

(387 °C)

Insolation (S⊕)

44.87

Earth = 1.00

Earth Similarity (ESI)

0.359

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

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-1920

Spectral Class

F-type yellow-white

Effective Temperature

6,277 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.161 R☉

Stellar Mass

1.239 M☉

Metallicity [Fe/H]

0.21

Extended Stellar Properties

Surface gravity (log g)

4.402 dex

Stellar density

27.418 g/cm³

Metallicity ratio

[Fe/H]

Distance

885.91 parsec

Light-years 2,889.46 ly

V-band magnitude

14.39 mag

Voyager-speed travel 50,955,596 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.100 mas

Total Proper Motion

3.277 mas/yr

PM Right Ascension

2.75 mas/yr

PM Declination

-1.78 mas/yr

Galactic Cartesian (pc)

x = 0.280 · y = -0.727 · z = 0.627

Equatorial (J2000)

RA 291.06204° · Dec 38.86329°

Galactic ℓ, b

71.252° · 10.792°

Ecliptic λ, β

303.855° · 59.851°

HTM-20 index

1928480350