Key parameters at a glance

A radius of 3.00 Earth radii
A mass of 9.28 Earth masses
Surface gravity around 1.03 g
An orbital period of 46.716 days
Semi-major axis 0.2588 AU
Equilibrium temperature 531 K (258 °C)
Distance from Earth 5,777.23 light-years
Earth Similarity Index 0.438
Travel time at Voyager 1 speed 101,881,513 years

Kepler-1925 b Planet Profile

Physical Specs

Radius

3.00 R⊕

Radius (Jupiter)

0.268 R♃

Mass

9.28 M⊕

Mass (Jupiter)

0.029 M♃

Density

1.89 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.438

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

#520of 1978

top 26.2%

This planet

3.00R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-338 d 3.00 R⊕ HD 3167 c 3.00 R⊕ HIP 94235 b 3.00 R⊕

Metric	Earth	Kepler-1925 b	Jupiter
Radius (R⊕)	1.00	3.00	11.21
Mass (M⊕)	1.00	9.28	317.83
Density (g/cm³)	5.51	1.89	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	18.74	0.037

Star Catalogue Identifiers

TIC

TIC 159177232

Gaia DR2

Gaia DR2 2127063316192062464

Gaia DR3

Gaia DR3 2127063316192062464

System

Kepler-1925

Percentile among Sub-Neptune cohort

Radius 3.002 R⊕ · percentile 74 / cohort 1978

Mass 9.280 M⊕ · percentile 67 / cohort 1978

Orbital period 46.72 d · percentile 84 / cohort 1946

Distance 1,771.31 pc · percentile 96 / cohort 1975

ESI 0.438 · percentile 60 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

46.716 days

Semi-major axis

0.2588 AU

Eccentricity

0.000

Inclination

89.68 °

Year Length

A year here lasts approximately 46.72 Earth days (12.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2588 AU.

Transit Fingerprint

Depth

0.035 %

Duration

7.353 h

Impact parameter b

0.159

Rp / R★

0.016994

Transit midpoint (BJD)

2,454,978.4922

Photometric dip

Transit produces a flux drop of 346 ppm lasting ≈ 7.35 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016994

Semi-major axis / stellar radius

48.710

Impact parameter (b)

0.159

Transit mid-time (BJD)

2,454,978.4922

Angular separation (arcsec)

0.14600

Eq. Temperature

531K

(258 °C)

Insolation (S⊕)

18.74

Earth = 1.00

Earth Similarity (ESI)

0.438

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-1925

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,856 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.092 R☉

Stellar Mass

1.057 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.386 dex

Stellar density

0.975 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,771.31 parsec

Light-years 5,777.23 ly

V-band magnitude

15.38 mag

Voyager-speed travel 101,881,513 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.536 mas

Total Proper Motion

17.861 mas/yr

PM Right Ascension

-4.63 mas/yr

PM Declination

-17.25 mas/yr

Galactic Cartesian (pc)

x = 0.239 · y = -0.664 · z = 0.708

Equatorial (J2000)

RA 289.82875° · Dec 45.10269°

Galactic ℓ, b

76.630° · 14.287°

Ecliptic λ, β

306.172° · 66.070°

HTM-20 index

2041604084