Key parameters at a glance

A radius of 1.83 Earth radii
A mass of 4.01 Earth masses
Surface gravity around 1.20 g
An orbital period of 4.266 days
Semi-major axis 0.0359 AU
Equilibrium temperature 485 K (212 °C)
Distance from Earth 134.62 light-years
Earth Similarity Index 0.571
Travel time at Voyager 1 speed 2,374,085 years
Almost certainly tidally locked to its host star given the close orbit

TOI-1743 b Planet Profile

Physical Specs

Radius

1.83 R⊕

Radius (Jupiter)

0.163 R♃

Mass

4.01 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.60 g/cm³

Surface Gravity

1.20 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.571

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

#221of 1176

top 18.7%

This planet

1.83R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

WASP-47 e 1.83 R⊕ Kepler-110 b 1.83 R⊕ K2-316 c 1.83 R⊕

Metric	Earth	TOI-1743 b	Jupiter
Radius (R⊕)	1.00	1.83	11.21
Mass (M⊕)	1.00	4.01	317.83
Density (g/cm³)	5.51	3.60	1.33
Surface Gravity (g)	1.00	1.20	2.53
Insolation (S⊕)	1.00	10.88	0.037

Star Catalogue Identifiers

TIC

TIC 219860288

Gaia DR2

Gaia DR2 1651807592698185728

Gaia DR3

Gaia DR3 1651807592698185728

System

TOI-1743

Percentile among Super-Earth cohort

Radius 1.830 R⊕ · percentile 80 / cohort 1176

Mass 4.010 M⊕ · percentile 74 / cohort 1176

Orbital period 4.27 d · percentile 34 / cohort 1164

Distance 41.28 pc · percentile 9 / cohort 1171

ESI 0.571 · percentile 79 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

4.266 days

Semi-major axis

0.0359 AU

Eccentricity

—

Inclination

87.92 °

Year Length

A year here lasts approximately 4.27 Earth days (1.2% of a terrestrial year) at a mean orbital distance of 0.0359 AU.

Transit Fingerprint

Depth

0.170 %

Duration

0.924 h

Impact parameter b

0.827

Rp / R★

0.049600

Transit midpoint (BJD)

2,459,575.1723

Photometric dip

Transit produces a flux drop of 1,700 ppm lasting ≈ 0.92 h.

Extended Orbital Architecture

Planet / star radius ratio

0.049600

Semi-major axis / stellar radius

22.810

Impact parameter (b)

0.827

Transit mid-time (BJD)

2,459,575.1723

Angular separation (arcsec)

0.87000

Eq. Temperature

485K

(212 °C)

Insolation (S⊕)

10.88

Earth = 1.00

Earth Similarity (ESI)

0.571

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.

Discovery Paper

Primary reference

Yalcinkaya et al. 2025

Instrument

TESS CCD Array

Publication

2025-10

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-4364 b · Sub-Neptune HD 35843 c · Sub-Neptune

Host System: TOI-1743

Spectral Class

M-type red dwarf

Effective Temperature

3,277 K — cooler than the Sun (5,778 K)

Estimated Age

9.70 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.338 R☉

Stellar Mass

0.339 M☉

Metallicity [Fe/H]

0.22

Extended Stellar Properties

Surface gravity (log g)

4.909 dex

Stellar density

12.300 g/cm³

Metallicity ratio

[Fe/H]

Distance

41.28 parsec

Light-years 134.62 ly

V-band magnitude

14.97 mag

Voyager-speed travel 2,374,085 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

24.199 mas

Total Proper Motion

200.303 mas/yr

PM Right Ascension

66.98 mas/yr

PM Declination

188.77 mas/yr

Galactic Cartesian (pc)

x = -0.066 · y = -0.304 · z = 0.950

Equatorial (J2000)

RA 257.74733° · Dec 71.87220°

Galactic ℓ, b

103.203° · 33.427°

Ecliptic λ, β

123.679° · 83.162°

HTM-20 index

-1227639727