Key parameters at a glance

A radius of 1.97 Earth radii
A mass of 4.54 Earth masses
Surface gravity around 1.17 g
An orbital period of 5.784 days
Semi-major axis 0.0655 AU
Equilibrium temperature 1,051 K (778 °C)
Distance from Earth 3,436.02 light-years
Earth Similarity Index 0.259
Travel time at Voyager 1 speed 60,594,224 years

Kepler-1831 b Planet Profile

Physical Specs

Radius

1.97 R⊕

Radius (Jupiter)

0.176 R♃

Mass

4.54 M⊕

Mass (Jupiter)

0.014 M♃

Density

3.26 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.259

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

#37of 1176

top 3.1%

This planet

1.97R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-224 e 1.97 R⊕ Kepler-184 c 1.97 R⊕ Kepler-347 b 1.97 R⊕

Metric	Earth	Kepler-1831 b	Jupiter
Radius (R⊕)	1.00	1.97	11.21
Mass (M⊕)	1.00	4.54	317.83
Density (g/cm³)	5.51	3.26	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	288.69	0.037

Star Catalogue Identifiers

TIC

TIC 27456723

Gaia DR2

Gaia DR2 2134935544568504832

Gaia DR3

Gaia DR3 2134935544568504832

System

Kepler-1831

Percentile among Super-Earth cohort

Radius 1.970 R⊕ · percentile 97 / cohort 1176

Mass 4.540 M⊕ · percentile 88 / cohort 1176

Orbital period 5.78 d · percentile 46 / cohort 1164

Distance 1,053.49 pc · percentile 84 / cohort 1171

ESI 0.259 · percentile 26 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.784 days

Semi-major axis

0.0655 AU

Eccentricity

0.000

Inclination

89.59 °

Year Length

A year here lasts approximately 5.78 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0655 AU.

Transit Fingerprint

Depth

0.041 %

Duration

1.397 h

Impact parameter b

0.015

Rp / R★

0.018724

Transit midpoint (BJD)

2,454,968.5798

Photometric dip

Transit produces a flux drop of 413 ppm lasting ≈ 1.40 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018724

Semi-major axis / stellar radius

31.420

Impact parameter (b)

0.015

Transit mid-time (BJD)

2,454,968.5798

Angular separation (arcsec)

0.06220

Eq. Temperature

1,051K

(778 °C)

Insolation (S⊕)

288.69

Earth = 1.00

Earth Similarity (ESI)

0.259

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-1831

Spectral Class

F-type yellow-white

Effective Temperature

6,063 K — hotter than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.012 R☉

Stellar Mass

1.117 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.476 dex

Stellar density

17.547 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,053.49 parsec

Light-years 3,436.02 ly

V-band magnitude

15.16 mag

Voyager-speed travel 60,594,224 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.921 mas

Total Proper Motion

14.583 mas/yr

PM Right Ascension

-7.56 mas/yr

PM Declination

-12.47 mas/yr

Galactic Cartesian (pc)

x = 0.277 · y = -0.586 · z = 0.761

Equatorial (J2000)

RA 295.30246° · Dec 49.58905°

Galactic ℓ, b

82.438° · 12.878°

Ecliptic λ, β

319.712° · 68.703°

HTM-20 index

-299631849