Key parameters at a glance

A radius of 16.81 Earth radii
A mass of 143.02 Earth masses
Surface gravity around 0.51 g
An orbital period of 2.922 days
Equilibrium temperature 2,027 K (1754 °C)
Distance from Earth 2,338.96 light-years
Earth Similarity Index 0.044
Travel time at Voyager 1 speed 41,247,487 years

TOI-4329 b Planet Profile

Physical Specs

Radius

16.81 R⊕

Radius (Jupiter)

1.500 R♃

Mass

143.02 M⊕

Mass (Jupiter)

0.450 M♃

Density

0.17 g/cm³

Surface Gravity

0.51 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.044

HZ Position Inner

Controversial No

Discovery

Year 2022

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#120of 1771

top 6.7%

This planet

16.81R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-136 b 16.81 R⊕ WASP-48 b 16.81 R⊕ HIP 65426 b 16.81 R⊕

Metric	Earth	TOI-4329 b	Jupiter
Radius (R⊕)	1.00	16.81	11.21
Mass (M⊕)	1.00	143.02	317.83
Density (g/cm³)	5.51	0.17	1.33
Surface Gravity (g)	1.00	0.51	2.53
Insolation (S⊕)	1.00	3,990.57	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	143.023 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 256722647

Gaia DR2

Gaia DR2 2224458777730383616

Gaia DR3

Gaia DR3 2224458777730383616

System

TOI-4329

Percentile among Gas Giant cohort

Radius 16.813 R⊕ · percentile 93 / cohort 1771

Mass 143.023 M⊕ · percentile 11 / cohort 1747

Orbital period 2.92 d · percentile 15 / cohort 1533

Distance 717.13 pc · percentile 81 / cohort 1759

ESI 0.044 · percentile 2 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.922 days

Semi-major axis

— AU

Eccentricity

0.068

Inclination

— °

Year Length

A year here lasts approximately 2.92 Earth days (0.8% of a terrestrial year) on a nearly circular orbit.

Transit Fingerprint

Depth

0.572 %

Duration

5.556 h

Impact parameter b

0.240

Transit midpoint (BJD)

2,458,765.0680

Photometric dip

Transit produces a flux drop of 5,724 ppm lasting ≈ 5.56 h.

Extended Orbital Architecture

Impact parameter (b)

0.240

RV semi-amplitude (K)

55.600 m/s

Transit mid-time (BJD)

2,458,765.0680

Long. of periastron (ω)

0.29°

Eq. Temperature

2,027K

(1754 °C)

Insolation (S⊕)

3,990.57

Earth = 1.00

Earth Similarity (ESI)

0.044

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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

Grunblatt et al. 2022

Instrument

TESS CCD Array

Publication

2022-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-1452 b · Super-Earth TOI-712 d · Sub-Neptune TOI-1468 c · Sub-Neptune TOI-2136 b · Sub-Neptune LTT 1445 A c · Rocky Terrestrial TOI-712 c · Sub-Neptune LP 890-9 b · Super-Earth TOI-2081 b · Sub-Neptune GJ 3929 b · Rocky Terrestrial HD 260655 c · Super-Earth HD 73583 c · Sub-Neptune TOI-1759 b · Sub-Neptune

Host System: TOI-4329

Spectral Class

F-type yellow-white

Effective Temperature

6,000 K — hotter than the Sun (5,778 K)

Estimated Age

2.39 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.310 R☉

Stellar Mass

1.538 M☉

Metallicity [Fe/H]

0.29

Extended Stellar Properties

Surface gravity (log g)

3.900 dex

Stellar density

0.179 g/cm³

Metallicity ratio

[Fe/H]

Distance

717.13 parsec

Light-years 2,338.96 ly

V-band magnitude

12.72 mag

Voyager-speed travel 41,247,487 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.366 mas

Total Proper Motion

4.440 mas/yr

PM Right Ascension

4.42 mas/yr

PM Declination

0.47 mas/yr

Galactic Cartesian (pc)

x = 0.279 · y = -0.164 · z = 0.946

Equatorial (J2000)

RA 329.56392° · Dec 71.13160°

Galactic ℓ, b

109.785° · 12.827°

Ecliptic λ, β

39.034° · 68.963°

HTM-20 index

-865405836