Key parameters at a glance

A radius of 2.30 Earth radii
A mass of 30.00 Earth masses
Surface gravity around 5.65 g
An orbital period of 23.541 days
Semi-major axis 0.1470 AU
Equilibrium temperature 521 K (248 °C)
Distance from Earth 279.85 light-years
Earth Similarity Index 0.430
Travel time at Voyager 1 speed 4,935,206 years

TOI-1443 b Planet Profile

Physical Specs

Radius

2.30 R⊕

Radius (Jupiter)

0.206 R♃

Mass

30.00 M⊕

Mass (Jupiter)

0.094 M♃

Density

14.00 g/cm³

Surface Gravity

5.65 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.430

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

#1496of 1978

top 75.6%

This planet

2.30R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-202 b 2.30 R⊕ TOI-178 e 2.30 R⊕ Kepler-328 b 2.30 R⊕

Metric	Earth	TOI-1443 b	Jupiter
Radius (R⊕)	1.00	2.30	11.21
Mass (M⊕)	1.00	30.00	317.83
Density (g/cm³)	5.51	14.00	1.33
Surface Gravity (g)	1.00	5.65	2.53
Insolation (S⊕)	1.00	16.86	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	30.000 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 237232044

Gaia DR2

Gaia DR2 2289567866301169664

Gaia DR3

Gaia DR3 2289567870599358080

System

TOI-1443

Percentile among Sub-Neptune cohort

Radius 2.304 R⊕ · percentile 24 / cohort 1978

Mass 30.000 M⊕ · percentile 97 / cohort 1978

Orbital period 23.54 d · percentile 67 / cohort 1946

Distance 85.80 pc · percentile 19 / cohort 1975

ESI 0.430 · percentile 58 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

23.541 days

Semi-major axis

0.1470 AU

Eccentricity

0.000

Inclination

— °

Year Length

A year here lasts approximately 23.54 Earth days (6.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1470 AU.

Transit Fingerprint

Depth

0.096 %

Duration

4.260 h

Impact parameter b

0.319

Rp / R★

0.028119

Transit midpoint (BJD)

2,458,693.2500

Photometric dip

Transit produces a flux drop of 956 ppm lasting ≈ 4.26 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028119

Impact parameter (b)

0.319

Transit mid-time (BJD)

2,458,693.2500

Long. of periastron (ω)

90.00°

Angular separation (arcsec)

1.71000

Eq. Temperature

521K

(248 °C)

Insolation (S⊕)

16.86

Earth = 1.00

Earth Similarity (ESI)

0.430

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

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-1443

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,224 K — cooler than the Sun (5,778 K)

Estimated Age

7.40 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.751 R☉

Stellar Mass

0.766 M☉

Metallicity [Fe/H]

-0.29

Extended Stellar Properties

Surface gravity (log g)

4.564 dex

Stellar density

2.490 g/cm³

Metallicity ratio

[Fe/H]

Distance

85.80 parsec

Light-years 279.85 ly

V-band magnitude

10.68 mag

Voyager-speed travel 4,935,206 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

11.626 mas

Total Proper Motion

90.719 mas/yr

PM Right Ascension

-88.07 mas/yr

PM Declination

21.78 mas/yr

Galactic Cartesian (pc)

x = 0.110 · y = -0.213 · z = 0.971

Equatorial (J2000)

RA 297.39868° · Dec 76.13918°

Galactic ℓ, b

108.351° · 22.904°

Ecliptic λ, β

60.010° · 77.257°

HTM-20 index

2048862169