Key parameters at a glance

A radius of 2.82 Earth radii
A mass of 8.35 Earth masses
Surface gravity around 1.05 g
An orbital period of 1.159 days
Semi-major axis 0.0164 AU
Equilibrium temperature 861 K (588 °C)
Distance from Earth 263.06 light-years
Earth Similarity Index 0.280
Travel time at Voyager 1 speed 4,638,979 years
Almost certainly tidally locked to its host star given the close orbit

TOI-4479 b Planet Profile

Physical Specs

Radius

2.82 R⊕

Radius (Jupiter)

0.252 R♃

Mass

8.35 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.05 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.280

HZ Position Inner

Controversial No

Discovery

Year 2022

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#720of 1978

top 36.3%

This planet

2.82R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-281 b 2.82 R⊕ Kepler-198 b 2.82 R⊕ Kepler-722 c 2.82 R⊕

Metric	Earth	TOI-4479 b	Jupiter
Radius (R⊕)	1.00	2.82	11.21
Mass (M⊕)	1.00	8.35	317.83
Density (g/cm³)	5.51	2.05	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	92.50	0.037

Star Catalogue Identifiers

TIC

TIC 126606859

Gaia DR2

Gaia DR2 1841177820379504768

Gaia DR3

Gaia DR3 1841177820379504768

System

TOI-4479

Percentile among Sub-Neptune cohort

Radius 2.820 R⊕ · percentile 63 / cohort 1978

Mass 8.350 M⊕ · percentile 58 / cohort 1978

Orbital period 1.16 d · percentile 0 / cohort 1946

Distance 80.65 pc · percentile 18 / cohort 1975

ESI 0.280 · percentile 23 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

1.159 days

Semi-major axis

0.0164 AU

Eccentricity

—

Inclination

86.36 °

Year Length

A year here lasts approximately 1.16 Earth days (0.3% of a terrestrial year) at a mean orbital distance of 0.0164 AU.

Transit Fingerprint

Depth

0.347 %

Duration

1.169 h

Impact parameter b

0.430

Rp / R★

0.062000

Transit midpoint (BJD)

2,459,420.7578

Photometric dip

Transit produces a flux drop of 3,471 ppm lasting ≈ 1.17 h.

Extended Orbital Architecture

Planet / star radius ratio

0.062000

Semi-major axis / stellar radius

7.800

Impact parameter (b)

0.430

Transit mid-time (BJD)

2,459,420.7578

Angular separation (arcsec)

0.20300

Eq. Temperature

861K

(588 °C)

Insolation (S⊕)

92.50

Earth = 1.00

Earth Similarity (ESI)

0.280

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

Esparza Borges et al. 2022

Instrument

TESS CCD Array

Publication

2022-06

Observation locale

Space

Discovery cohort

Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-1452 b · Super-Earth TOI-712 d · Sub-Neptune TOI-1468 c · Sub-Neptune TOI-2136 b · Sub-Neptune LTT 1445 A c · Rocky Terrestrial TOI-712 c · Sub-Neptune LP 890-9 b · Super-Earth TOI-2081 b · Sub-Neptune GJ 3929 b · Rocky Terrestrial HD 260655 c · Super-Earth HD 73583 c · Sub-Neptune TOI-1759 b · Sub-Neptune

Host System: TOI-4479

Spectral Class

M-type red dwarf

Effective Temperature

3,400 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.451 R☉

Stellar Mass

0.452 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

7.621 g/cm³

Metallicity ratio

[Fe/H]

Distance

80.65 parsec

Light-years 263.06 ly

V-band magnitude

15.18 mag

Voyager-speed travel 4,638,979 yr

Multi-band Host Photometry — 10 bands

Astrometric Data

Parallax

12.370 mas

Total Proper Motion

151.445 mas/yr

PM Right Ascension

90.93 mas/yr

PM Declination

-121.11 mas/yr

Galactic Cartesian (pc)

x = 0.655 · y = -0.630 · z = 0.417

Equatorial (J2000)

RA 316.09694° · Dec 24.65367°

Galactic ℓ, b

71.141° · -14.663°

Ecliptic λ, β

327.801° · 39.302°

HTM-20 index

267318744