Key parameters at a glance

A radius of 1.55 Earth radii
A mass of 3.01 Earth masses
Surface gravity around 1.26 g
An orbital period of 4.951 days
Semi-major axis 0.0525 AU
Equilibrium temperature 885 K (612 °C)
Distance from Earth 2,604.67 light-years
Earth Similarity Index 0.337
Travel time at Voyager 1 speed 45,933,274 years

Kepler-1940 b Planet Profile

Physical Specs

Radius

1.55 R⊕

Radius (Jupiter)

0.138 R♃

Mass

3.01 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.46 g/cm³

Surface Gravity

1.26 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.337

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

#668of 1176

top 56.7%

This planet

1.55R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1943 b 1.55 R⊕ Kepler-1805 b 1.55 R⊕ Kepler-226 b 1.55 R⊕

Metric	Earth	Kepler-1940 b	Jupiter
Radius (R⊕)	1.00	1.55	11.21
Mass (M⊕)	1.00	3.01	317.83
Density (g/cm³)	5.51	4.46	1.33
Surface Gravity (g)	1.00	1.26	2.53
Insolation (S⊕)	1.00	145.23	0.037

Star Catalogue Identifiers

TIC

TIC 159647359

Gaia DR2

Gaia DR2 2126645673572302080

Gaia DR3

Gaia DR3 2126645673572302080

System

Kepler-1940

Percentile among Super-Earth cohort

Radius 1.547 R⊕ · percentile 43 / cohort 1176

Mass 3.010 M⊕ · percentile 39 / cohort 1176

Orbital period 4.95 d · percentile 40 / cohort 1164

Distance 798.60 pc · percentile 67 / cohort 1171

ESI 0.337 · percentile 47 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

4.951 days

Semi-major axis

0.0525 AU

Eccentricity

0.000

Inclination

88.69 °

Year Length

A year here lasts approximately 4.95 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0525 AU.

Transit Fingerprint

Depth

0.031 %

Duration

1.808 h

Impact parameter b

0.458

Rp / R★

0.017649

Transit midpoint (BJD)

2,454,965.8091

Photometric dip

Transit produces a flux drop of 310 ppm lasting ≈ 1.81 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017649

Semi-major axis / stellar radius

19.980

Impact parameter (b)

0.458

Transit mid-time (BJD)

2,454,965.8091

Angular separation (arcsec)

0.06570

Eq. Temperature

885K

(612 °C)

Insolation (S⊕)

145.23

Earth = 1.00

Earth Similarity (ESI)

0.337

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-1940

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,431 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.717 R☉

Stellar Mass

0.802 M☉

Metallicity [Fe/H]

-0.44

Extended Stellar Properties

Surface gravity (log g)

4.623 dex

Stellar density

6.153 g/cm³

Metallicity ratio

[Fe/H]

Distance

798.60 parsec

Light-years 2,604.67 ly

V-band magnitude

15.67 mag

Voyager-speed travel 45,933,274 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.224 mas

Total Proper Motion

10.766 mas/yr

PM Right Ascension

0.20 mas/yr

PM Declination

-10.76 mas/yr

Galactic Cartesian (pc)

x = 0.255 · y = -0.656 · z = 0.710

Equatorial (J2000)

RA 291.20420° · Dec 45.23833°

Galactic ℓ, b

77.175° · 13.463°

Ecliptic λ, β

308.523° · 65.865°

HTM-20 index

1585463219