Key parameters at a glance

A radius of 4.06 Earth radii
A mass of 18.05 Earth masses
Surface gravity around 1.10 g
An orbital period of 6.363 days
Semi-major axis 0.0640 AU
Equilibrium temperature 891 K (618 °C)
Distance from Earth 397.39 light-years
Earth Similarity Index 0.238
Travel time at Voyager 1 speed 7,007,945 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around TOI-1472

TOI-1472 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
TOI-1472 b this	Neptune-like	4.06	18.05	6.363	891	2024
TOI-1472 c	Sub-Neptune	3.33	21.13	15.538	662	2025

TOI-1472 b Planet Profile

Physical Specs

Radius

4.06 R⊕

Radius (Jupiter)

0.362 R♃

Mass

18.05 M⊕

Mass (Jupiter)

0.057 M♃

Density

1.49 g/cm³

Surface Gravity

1.10 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.238

HZ Position Inner

Controversial No

Discovery

Year 2024

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#558of 574

top 97.0%

This planet

4.06R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

HD 190007 b 4.06 R⊕ Kepler-258 b 4.06 R⊕ Kepler-302 b 4.06 R⊕

Metric	Earth	TOI-1472 b	Jupiter
Radius (R⊕)	1.00	4.06	11.21
Mass (M⊕)	1.00	18.05	317.83
Density (g/cm³)	5.51	1.49	1.33
Surface Gravity (g)	1.00	1.10	2.53
Insolation (S⊕)	1.00	110.02	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	18.050 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 306955329

Gaia DR2

Gaia DR2 402396521052843264

Gaia DR3

Gaia DR3 402396521052843264

System

TOI-1472

Percentile among Neptune-like cohort

Radius 4.058 R⊕ · percentile 3 / cohort 574

Mass 18.050 M⊕ · percentile 22 / cohort 574

Orbital period 6.36 d · percentile 26 / cohort 524

Distance 121.84 pc · percentile 27 / cohort 572

ESI 0.238 · percentile 38 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

6.363 days

Semi-major axis

0.0640 AU

Eccentricity

0.041

Inclination

89.95 °

Year Length

A year here lasts approximately 6.36 Earth days (1.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0640 AU.

Transit Fingerprint

Depth

0.237 %

Duration

2.740 h

Impact parameter b

0.014

Rp / R★

0.044000

Transit midpoint (BJD)

2,459,694.6639

Photometric dip

Transit produces a flux drop of 2,369 ppm lasting ≈ 2.74 h.

Extended Orbital Architecture

Planet / star radius ratio

0.044000

Semi-major axis / stellar radius

18.565

Impact parameter (b)

0.014

RV semi-amplitude (K)

6.841 m/s

Transit mid-time (BJD)

2,459,694.6639

Long. of periastron (ω)

50.50°

Angular separation (arcsec)

0.52500

Eq. Temperature

891K

(618 °C)

Insolation (S⊕)

110.02

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. 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

Polanski et al. 2024

Instrument

TESS CCD Array

Publication

2024-06

Observation locale

Space

Discovery cohort

Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

Gliese 12 b · Rocky Terrestrial TOI-6002 b · Super-Earth TOI-5713 b · Super-Earth TOI-4336 A b · Sub-Neptune TOI-406.01 · Sub-Neptune TOI-1224 c · Sub-Neptune LHS 1678 d · Rocky Terrestrial TOI-2088 b · Sub-Neptune TOI-2120 b · Sub-Neptune TOI-1806.01 · Sub-Neptune TOI-4633 c · Sub-Neptune TOI-260 b · Super-Earth

Host System: TOI-1472

Spectral Class

K-type orange

Effective Temperature

5,100 K — cooler than the Sun (5,778 K)

Estimated Age

3.10 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.840 R☉

Stellar Mass

0.870 M☉

Metallicity [Fe/H]

0.27

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

2.184 g/cm³

Systemic radial velocity

-15.05 km/s

Activity index (log R'HK)

-4.790

Metallicity ratio

[Fe/H]

Distance

121.84 parsec

Light-years 397.39 ly

V-band magnitude

11.30 mag

Voyager-speed travel 7,007,945 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.180 mas

Total Proper Motion

104.241 mas/yr

PM Right Ascension

103.37 mas/yr

PM Declination

-13.43 mas/yr

Galactic Cartesian (pc)

x = 0.641 · y = 0.161 · z = 0.751

Equatorial (J2000)

RA 14.11426° · Dec 48.63752°

Galactic ℓ, b

123.787° · -14.226°

Ecliptic λ, β

34.855° · 38.646°

HTM-20 index

-465577535

Similar Worlds

HD 190007 b

Neptune-like · K-type orange

Radius 4.06 R⊕ · 41.5 ly

Kepler-258 b

Neptune-like · K-type orange

Radius 4.06 R⊕ · 1,878.6 ly

Kepler-248 c

Neptune-like · K-type orange

Radius 4.07 R⊕ · 2,409.6 ly

BD-11 4672 c

Neptune-like · K-type orange

Radius 4.04 R⊕ · 88.6 ly

Kepler-247 c

Neptune-like · K-type orange

Radius 4.09 R⊕ · 2,164.7 ly

Kepler-815 b

Neptune-like · K-type orange

Radius 4.11 R⊕ · 4,107.2 ly

Explore Related Categories

Neptune-like Planets Transit Discoveries Transiting Exoplanet Survey Satellite (TESS) Mission K-type orange Hosts