Key parameters at a glance

A radius of 1.06 Earth radii
A mass of 1.17 Earth masses
Surface gravity around 1.04 g
An orbital period of 0.279 days
Equilibrium temperature 1,216 K (943 °C)
Distance from Earth 67.02 light-years
Earth Similarity Index 0.259
Travel time at Voyager 1 speed 1,181,918 years
Almost certainly tidally locked to its host star given the close orbit

TOI-6324 b Planet Profile

Physical Specs

Radius

1.06 R⊕

Radius (Jupiter)

0.094 R♃

Mass

1.17 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.41 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.259

HZ Position Inner

Controversial No

Discovery

Year 2025

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#278of 570

top 48.6%

This planet

1.06R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1203 b 1.06 R⊕ Kepler-1200 b 1.06 R⊕ Kepler-316 b 1.06 R⊕

Metric	Earth	TOI-6324 b	Jupiter
Radius (R⊕)	1.00	1.06	11.21
Mass (M⊕)	1.00	1.17	317.83
Density (g/cm³)	5.51	5.41	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	284.21	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1.170 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 372207328

Gaia DR2

Gaia DR2 2220012421430629632

Gaia DR3

Gaia DR3 2220012421430629632

System

TOI-6324

Percentile among Rocky Terrestrial cohort

Radius 1.059 R⊕ · percentile 51 / cohort 570

Mass 1.170 M⊕ · percentile 46 / cohort 570

Orbital period 0.28 d · percentile 1 / cohort 567

Distance 20.55 pc · percentile 10 / cohort 566

ESI 0.259 · percentile 27 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.279 days

Semi-major axis

— AU

Eccentricity

0.000

Inclination

74.60 °

Year Length

A year here lasts roughly 6.7 hours long on a nearly circular orbit.

Transit Fingerprint

Depth

0.078 %

Duration

0.409 h

Impact parameter b

0.750

Rp / R★

0.033100

Transit midpoint (BJD)

2,458,739.9793

Photometric dip

Transit produces a flux drop of 779 ppm lasting ≈ 0.41 h.

Extended Orbital Architecture

Planet / star radius ratio

0.033100

Semi-major axis / stellar radius

3.170

Impact parameter (b)

0.750

RV semi-amplitude (K)

2.690 m/s

Transit mid-time (BJD)

2,458,739.9793

Eq. Temperature

1,216K

(943 °C)

Insolation (S⊕)

284.21

Earth = 1.00

Earth Similarity (ESI)

0.259

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Lee et al. 2025

Instrument

TESS CCD Array

Publication

2025-04

Observation locale

Space

Discovery cohort

Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-1266 d · Super-Earth TOI-2267 c · Rocky Terrestrial TOI-5799 c · Super-Earth TOI-5728 b · Super-Earth TOI-5716 b · Rocky Terrestrial TOI-7166 b · Sub-Neptune TOI-2267 b · Rocky Terrestrial TOI-2093 c · Sub-Neptune TOI-2267 d · Super-Earth TOI-5489 c · Super-Earth TOI-1743 b · Super-Earth TOI-4364 b · Sub-Neptune

Host System: TOI-6324

Spectral Class

M-type red dwarf

Effective Temperature

3,247 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.293 R☉

Stellar Mass

0.269 M☉

Metallicity [Fe/H]

-0.32

Extended Stellar Properties

Surface gravity (log g)

4.930 dex

Stellar density

10.700 g/cm³

Rotational v·sin i

2.00 km/s

Metallicity ratio

[Fe/H]

Distance

20.55 parsec

Light-years 67.02 ly

V-band magnitude

13.39 mag

Voyager-speed travel 1,181,918 yr

Multi-band Host Photometry — 7 bands

Astrometric Data

Parallax

48.636 mas

Total Proper Motion

608.433 mas/yr

PM Right Ascension

531.46 mas/yr

PM Declination

-296.21 mas/yr

Galactic Cartesian (pc)

x = 0.334 · y = -0.186 · z = 0.924

Equatorial (J2000)

RA 330.84454° · Dec 67.49868°

Galactic ℓ, b

107.870° · 9.684°

Ecliptic λ, β

30.441° · 67.191°

HTM-20 index

-1232941304