Key parameters at a glance

A radius of 2.71 Earth radii
A mass of 7.80 Earth masses
Surface gravity around 1.06 g
An orbital period of 25.543 days
Semi-major axis 0.1787 AU
Equilibrium temperature 772 K (499 °C)
Distance from Earth 2,559.10 light-years
Earth Similarity Index 0.318
Travel time at Voyager 1 speed 45,129,753 years

Kepler-1843 b Planet Profile

Physical Specs

Radius

2.71 R⊕

Radius (Jupiter)

0.242 R♃

Mass

7.80 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.16 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.318

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

#859of 1978

top 43.4%

This planet

2.71R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1801 b 2.71 R⊕ Kepler-355 c 2.71 R⊕ Kepler-48 c 2.71 R⊕

Metric	Earth	Kepler-1843 b	Jupiter
Radius (R⊕)	1.00	2.71	11.21
Mass (M⊕)	1.00	7.80	317.83
Density (g/cm³)	5.51	2.16	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	111.80	0.037

Star Catalogue Identifiers

TIC

TIC 137900524

Gaia DR2

Gaia DR2 2053569485093626752

Gaia DR3

Gaia DR3 2053569485093626752

System

Kepler-1843

Percentile among Sub-Neptune cohort

Radius 2.709 R⊕ · percentile 57 / cohort 1978

Mass 7.800 M⊕ · percentile 52 / cohort 1978

Orbital period 25.54 d · percentile 69 / cohort 1946

Distance 784.63 pc · percentile 65 / cohort 1975

ESI 0.318 · percentile 32 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

25.543 days

Semi-major axis

0.1787 AU

Eccentricity

0.000

Inclination

88.78 °

Year Length

A year here lasts approximately 25.54 Earth days (7.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1787 AU.

Transit Fingerprint

Depth

0.014 %

Duration

8.567 h

Impact parameter b

0.593

Rp / R★

0.010710

Transit midpoint (BJD)

2,454,973.5871

Photometric dip

Transit produces a flux drop of 139 ppm lasting ≈ 8.57 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010710

Semi-major axis / stellar radius

18.400

Impact parameter (b)

0.593

Transit mid-time (BJD)

2,454,973.5871

Angular separation (arcsec)

0.22800

Eq. Temperature

772K

(499 °C)

Insolation (S⊕)

111.80

Earth = 1.00

Earth Similarity (ESI)

0.318

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-1843

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,422 K — cooler than the Sun (5,778 K)

Estimated Age

6.17 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.782 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

3.945 dex

Stellar density

0.259 g/cm³

Metallicity ratio

[Fe/H]

Distance

784.63 parsec

Light-years 2,559.10 ly

V-band magnitude

13.09 mag

Voyager-speed travel 45,129,753 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.246 mas

Total Proper Motion

21.214 mas/yr

PM Right Ascension

-14.21 mas/yr

PM Declination

-15.75 mas/yr

Galactic Cartesian (pc)

x = 0.292 · y = -0.692 · z = 0.660

Equatorial (J2000)

RA 292.88523° · Dec 41.27917°

Galactic ℓ, b

74.086° · 10.625°

Ecliptic λ, β

308.091° · 61.726°

HTM-20 index

1751876108