Key parameters at a glance

A radius of 2.31 Earth radii
A mass of 5.97 Earth masses
Surface gravity around 1.11 g
An orbital period of 42.878 days
Semi-major axis 0.2197 AU
Equilibrium temperature 451 K (178 °C)
Distance from Earth 2,176.78 light-years
Earth Similarity Index 0.559
Travel time at Voyager 1 speed 38,387,539 years

Kepler-1926 b Planet Profile

Physical Specs

Radius

2.31 R⊕

Radius (Jupiter)

0.207 R♃

Mass

5.97 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.64 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.559

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

#1485of 1978

top 75.0%

This planet

2.31R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1787 b 2.32 R⊕ Kepler-244 d 2.31 R⊕ Kepler-981 b 2.31 R⊕

Metric	Earth	Kepler-1926 b	Jupiter
Radius (R⊕)	1.00	2.31	11.21
Mass (M⊕)	1.00	5.97	317.83
Density (g/cm³)	5.51	2.64	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	9.80	0.037

Star Catalogue Identifiers

TIC

TIC 159649308

Gaia DR2

Gaia DR2 2126202432947724160

Gaia DR3

Gaia DR3 2126202432947724160

System

Kepler-1926

Percentile among Sub-Neptune cohort

Radius 2.315 R⊕ · percentile 25 / cohort 1978

Mass 5.970 M⊕ · percentile 24 / cohort 1978

Orbital period 42.88 d · percentile 82 / cohort 1946

Distance 667.41 pc · percentile 58 / cohort 1975

ESI 0.559 · percentile 78 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

42.878 days

Semi-major axis

0.2197 AU

Eccentricity

0.000

Inclination

89.99 °

Year Length

A year here lasts approximately 42.88 Earth days (11.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2197 AU.

Transit Fingerprint

Depth

0.107 %

Duration

1.991 h

Impact parameter b

0.020

Rp / R★

0.029346

Transit midpoint (BJD)

2,454,989.0697

Photometric dip

Transit produces a flux drop of 1,069 ppm lasting ≈ 1.99 h.

Extended Orbital Architecture

Planet / star radius ratio

0.029346

Semi-major axis / stellar radius

169.300

Impact parameter (b)

0.020

Transit mid-time (BJD)

2,454,989.0697

Angular separation (arcsec)

0.32900

Eq. Temperature

451K

(178 °C)

Insolation (S⊕)

9.80

Earth = 1.00

Earth Similarity (ESI)

0.559

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-1926

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,256 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.832 R☉

Stellar Mass

0.768 M☉

Metallicity [Fe/H]

-0.16

Extended Stellar Properties

Surface gravity (log g)

4.483 dex

Stellar density

49.971 g/cm³

Metallicity ratio

[Fe/H]

Distance

667.41 parsec

Light-years 2,176.78 ly

V-band magnitude

15.80 mag

Voyager-speed travel 38,387,539 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.472 mas

Total Proper Motion

6.600 mas/yr

PM Right Ascension

-3.18 mas/yr

PM Declination

-5.79 mas/yr

Galactic Cartesian (pc)

x = 0.259 · y = -0.669 · z = 0.697

Equatorial (J2000)

RA 291.19879° · Dec 44.16620°

Galactic ℓ, b

76.177° · 13.009°

Ecliptic λ, β

307.627° · 64.860°

HTM-20 index

803893641