Key parameters at a glance

A radius of 2.84 Earth radii
A mass of 8.43 Earth masses
Surface gravity around 1.05 g
An orbital period of 6.454 days
Semi-major axis 0.0683 AU
Equilibrium temperature 999 K (726 °C)
Distance from Earth 3,459.77 light-years
Earth Similarity Index 0.238
Travel time at Voyager 1 speed 61,012,952 years

Kepler-1724 b Planet Profile

Physical Specs

Radius

2.84 R⊕

Radius (Jupiter)

0.253 R♃

Mass

8.43 M⊕

Mass (Jupiter)

0.027 M♃

Density

2.03 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.238

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

#701of 1978

top 35.4%

This planet

2.84R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-410 A b 2.84 R⊕ Kepler-1665 b 2.84 R⊕ Kepler-133 c 2.84 R⊕

Metric	Earth	Kepler-1724 b	Jupiter
Radius (R⊕)	1.00	2.84	11.21
Mass (M⊕)	1.00	8.43	317.83
Density (g/cm³)	5.51	2.03	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	234.98	0.037

Star Catalogue Identifiers

TIC

TIC 27771842

Gaia DR2

Gaia DR2 2086649220125927040

Gaia DR3

Gaia DR3 2086649220125927040

System

Kepler-1724

Percentile among Sub-Neptune cohort

Radius 2.837 R⊕ · percentile 65 / cohort 1978

Mass 8.430 M⊕ · percentile 59 / cohort 1978

Orbital period 6.45 d · percentile 20 / cohort 1946

Distance 1,060.77 pc · percentile 82 / cohort 1975

ESI 0.238 · percentile 14 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.454 days

Semi-major axis

0.0683 AU

Eccentricity

0.000

Inclination

86.67 °

Year Length

A year here lasts approximately 6.45 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0683 AU.

Transit Fingerprint

Depth

0.059 %

Duration

2.677 h

Impact parameter b

0.880

Rp / R★

0.023798

Transit midpoint (BJD)

2,455,006.2148

Photometric dip

Transit produces a flux drop of 586 ppm lasting ≈ 2.68 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023798

Semi-major axis / stellar radius

9.600

Impact parameter (b)

0.880

Transit mid-time (BJD)

2,455,006.2148

Angular separation (arcsec)

0.06440

Eq. Temperature

999K

(726 °C)

Insolation (S⊕)

234.98

Earth = 1.00

Earth Similarity (ESI)

0.238

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-1724

Spectral Class

F-type yellow-white

Effective Temperature

6,092 K — hotter than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.943 R☉

Stellar Mass

1.016 M☉

Metallicity [Fe/H]

-0.22

Extended Stellar Properties

Surface gravity (log g)

4.496 dex

Stellar density

0.973 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,060.77 parsec

Light-years 3,459.77 ly

V-band magnitude

14.96 mag

Voyager-speed travel 61,012,952 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.914 mas

Total Proper Motion

2.207 mas/yr

PM Right Ascension

2.11 mas/yr

PM Declination

0.65 mas/yr

Galactic Cartesian (pc)

x = 0.295 · y = -0.602 · z = 0.742

Equatorial (J2000)

RA 296.12073° · Dec 47.92147°

Galactic ℓ, b

81.176° · 11.632°

Ecliptic λ, β

318.959° · 66.974°

HTM-20 index

1956520333