Key parameters at a glance

A radius of 2.65 Earth radii
A mass of 7.53 Earth masses
Surface gravity around 1.07 g
An orbital period of 15.332 days
Semi-major axis 0.1216 AU
Equilibrium temperature 821 K (548 °C)
Distance from Earth 6,232.09 light-years
Earth Similarity Index 0.301
Travel time at Voyager 1 speed 109,902,919 years

Kepler-1924 b Planet Profile

Physical Specs

Radius

2.65 R⊕

Radius (Jupiter)

0.237 R♃

Mass

7.53 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.21 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.301

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

#942of 1978

top 47.6%

This planet

2.65R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1931 b 2.65 R⊕ Kepler-616 d 2.65 R⊕ TOI-1064 c 2.65 R⊕

Metric	Earth	Kepler-1924 b	Jupiter
Radius (R⊕)	1.00	2.65	11.21
Mass (M⊕)	1.00	7.53	317.83
Density (g/cm³)	5.51	2.21	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	107.44	0.037

Star Catalogue Identifiers

TIC

TIC 270705258

Gaia DR2

Gaia DR2 2077774443305045376

Gaia DR3

Gaia DR3 2077774443305045376

System

Kepler-1924

Percentile among Sub-Neptune cohort

Radius 2.654 R⊕ · percentile 52 / cohort 1978

Mass 7.530 M⊕ · percentile 48 / cohort 1978

Orbital period 15.33 d · percentile 51 / cohort 1946

Distance 1,910.77 pc · percentile 97 / cohort 1975

ESI 0.301 · percentile 28 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.332 days

Semi-major axis

0.1216 AU

Eccentricity

0.000

Inclination

86.55 °

Year Length

A year here lasts approximately 15.33 Earth days (4.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1216 AU.

Transit Fingerprint

Depth

0.018 %

Duration

5.239 h

Impact parameter b

0.032

Rp / R★

0.013025

Transit midpoint (BJD)

2,454,975.5250

Photometric dip

Transit produces a flux drop of 179 ppm lasting ≈ 5.24 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013025

Semi-major axis / stellar radius

22.640

Impact parameter (b)

0.032

Transit mid-time (BJD)

2,454,975.5250

Angular separation (arcsec)

0.06360

Eq. Temperature

821K

(548 °C)

Insolation (S⊕)

107.44

Earth = 1.00

Earth Similarity (ESI)

0.301

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-1924

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,726 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.285 R☉

Stellar Mass

1.018 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.228 dex

Stellar density

0.190 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,910.77 parsec

Light-years 6,232.09 ly

V-band magnitude

15.08 mag

Voyager-speed travel 109,902,919 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.495 mas

Total Proper Motion

6.056 mas/yr

PM Right Ascension

-2.09 mas/yr

PM Declination

-5.68 mas/yr

Galactic Cartesian (pc)

x = 0.296 · y = -0.671 · z = 0.680

Equatorial (J2000)

RA 293.76739° · Dec 42.82916°

Galactic ℓ, b

75.794° · 10.747°

Ecliptic λ, β

310.552° · 62.961°

HTM-20 index

-93924553