Key parameters at a glance

A radius of 2.55 Earth radii
A mass of 7.04 Earth masses
Surface gravity around 1.08 g
An orbital period of 3.981 days
Semi-major axis 0.0510 AU
Equilibrium temperature 1,380 K (1107 °C)
Distance from Earth 205.69 light-years
Earth Similarity Index 0.173
Travel time at Voyager 1 speed 3,627,273 years

TOI-4602.01 Planet Profile

Physical Specs

Radius

2.55 R⊕

Radius (Jupiter)

0.227 R♃

Mass

7.04 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.33 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.173

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

#1104of 1978

top 55.8%

This planet

2.55R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-156 c 2.55 R⊕ Kepler-1535 b 2.55 R⊕ Kepler-1043 b 2.55 R⊕

Metric	Earth	TOI-4602.01	Jupiter
Radius (R⊕)	1.00	2.55	11.21
Mass (M⊕)	1.00	7.04	317.83
Density (g/cm³)	5.51	2.33	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	603.69	0.037

Star Catalogue Identifiers

HIP

HIP 18841

TIC

TIC 467651916

Gaia DR2

Gaia DR2 169256041140206848

Gaia DR3

Gaia DR3 169256041140206848

System

TOI-4602

Percentile among Sub-Neptune cohort

Radius 2.550 R⊕ · percentile 44 / cohort 1978

Mass 7.040 M⊕ · percentile 41 / cohort 1978

Orbital period 3.98 d · percentile 8 / cohort 1946

Distance 63.06 pc · percentile 14 / cohort 1975

ESI 0.173 · percentile 4 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

3.981 days

Semi-major axis

0.0510 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 3.98 Earth days (1.1% of a terrestrial year) at a mean orbital distance of 0.0510 AU.

Transit Fingerprint

Depth

0.046 %

Duration

3.468 h

Rp / R★

0.020199

Transit midpoint (BJD)

2,460,655.2019

Photometric dip

Transit produces a flux drop of 464 ppm lasting ≈ 3.47 h.

Extended Orbital Architecture

Planet / star radius ratio

0.020199

Semi-major axis / stellar radius

9.486

Transit mid-time (BJD)

2,460,655.2019

Angular separation (arcsec)

0.80900

Eq. Temperature

1,380K

(1107 °C)

Insolation (S⊕)

603.69

Earth = 1.00

Earth Similarity (ESI)

0.173

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-4602

Spectral Class

F-type yellow-white

Effective Temperature

6,012 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.157 R☉

Stellar Mass

1.117 M☉

Metallicity [Fe/H]

—

Distance

63.06 parsec

Light-years 205.69 ly

V-band magnitude

8.32 mag

Voyager-speed travel 3,627,273 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

15.828 mas

Total Proper Motion

224.294 mas/yr

PM Right Ascension

-115.36 mas/yr

PM Declination

-192.35 mas/yr

Galactic Cartesian (pc)

x = 0.419 · y = 0.744 · z = 0.520

Equatorial (J2000)

RA 60.60033° · Dec 31.32984°

Galactic ℓ, b

164.032° · -15.911°

Ecliptic λ, β

64.759° · 10.430°

HTM-20 index

-2114442189