Key parameters at a glance

A radius of 2.67 Earth radii
A mass of 7.59 Earth masses
Surface gravity around 1.07 g
An orbital period of 4.666 days
Semi-major axis 0.0601 AU
Equilibrium temperature 1,264 K (991 °C)
Distance from Earth 256.87 light-years
Earth Similarity Index 0.188
Travel time at Voyager 1 speed 4,529,954 years

TOI-3353.01 Planet Profile

Physical Specs

Radius

2.67 R⊕

Radius (Jupiter)

0.238 R♃

Mass

7.59 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.20 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.188

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

#925of 1978

top 46.7%

This planet

2.67R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-264 c 2.67 R⊕ Kepler-96 b 2.67 R⊕ K2-26 b 2.67 R⊕

Metric	Earth	TOI-3353.01	Jupiter
Radius (R⊕)	1.00	2.67	11.21
Mass (M⊕)	1.00	7.59	317.83
Density (g/cm³)	5.51	2.20	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	313.04	0.037

Star Catalogue Identifiers

TIC

TIC 391903064

Gaia DR2

Gaia DR2 5212899427468919296

Gaia DR3

Gaia DR3 5212899427468919296

System

TOI-3353

Percentile among Sub-Neptune cohort

Radius 2.667 R⊕ · percentile 53 / cohort 1978

Mass 7.590 M⊕ · percentile 49 / cohort 1978

Orbital period 4.67 d · percentile 11 / cohort 1946

Distance 78.76 pc · percentile 17 / cohort 1975

ESI 0.188 · percentile 5 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

4.666 days

Semi-major axis

0.0601 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 4.67 Earth days (1.3% of a terrestrial year) at a mean orbital distance of 0.0601 AU.

Transit Fingerprint

Depth

0.057 %

Duration

3.041 h

Rp / R★

0.023933

Transit midpoint (BJD)

2,460,174.1500

Photometric dip

Transit produces a flux drop of 565 ppm lasting ≈ 3.04 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023933

Semi-major axis / stellar radius

12.672

Transit mid-time (BJD)

2,460,174.1500

Angular separation (arcsec)

0.76300

Eq. Temperature

1,264K

(991 °C)

Insolation (S⊕)

313.04

Earth = 1.00

Earth Similarity (ESI)

0.188

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Hord et al. 2024

Instrument

TESS CCD Array

Publication

2024-05

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-3353

Spectral Class

F-type yellow-white

Effective Temperature

6,365 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.021 R☉

Stellar Mass

1.332 M☉

Metallicity [Fe/H]

—

Distance

78.76 parsec

Light-years 256.87 ly

V-band magnitude

9.33 mag

Voyager-speed travel 4,529,954 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

12.668 mas

Total Proper Motion

39.056 mas/yr

PM Right Ascension

-5.96 mas/yr

PM Declination

38.60 mas/yr

Galactic Cartesian (pc)

x = -0.070 · y = 0.235 · z = -0.970

Equatorial (J2000)

RA 106.52981° · Dec -75.81956°

Galactic ℓ, b

287.237° · -25.349°

Ecliptic λ, β

247.724° · -79.403°

HTM-20 index

749351574