Key parameters at a glance

A radius of 1.73 Earth radii
A mass of 3.65 Earth masses
Surface gravity around 1.22 g
An orbital period of 4.165 days
Semi-major axis 0.0348 AU
Equilibrium temperature 505 K (232 °C)
Distance from Earth 90.71 light-years
Earth Similarity Index 0.561
Travel time at Voyager 1 speed 1,599,697 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around TOI-5799

TOI-5799 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
TOI-5799 b this	Super-Earth	1.73	3.65	4.165	505	2024
TOI-5799 c	Super-Earth	1.76	3.75	14.010	337	2025

TOI-5799 b Planet Profile

Physical Specs

Radius

1.73 R⊕

Radius (Jupiter)

0.155 R♃

Mass

3.65 M⊕

Mass (Jupiter)

0.012 M♃

Density

3.85 g/cm³

Surface Gravity

1.22 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.561

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

#354of 1176

top 30.0%

This planet

1.73R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

LHS 1903 e 1.73 R⊕ Kepler-1856 b 1.73 R⊕ Kepler-1608 b 1.73 R⊕

Metric	Earth	TOI-5799 b	Jupiter
Radius (R⊕)	1.00	1.73	11.21
Mass (M⊕)	1.00	3.65	317.83
Density (g/cm³)	5.51	3.85	1.33
Surface Gravity (g)	1.00	1.22	2.53
Insolation (S⊕)	1.00	11.91	0.037

Star Catalogue Identifiers

TIC

TIC 328081248

Gaia DR2

Gaia DR2 1807887150930343424

Gaia DR3

Gaia DR3 1807887150930343424

System

TOI-5799

Percentile among Super-Earth cohort

Radius 1.733 R⊕ · percentile 70 / cohort 1176

Mass 3.650 M⊕ · percentile 63 / cohort 1176

Orbital period 4.16 d · percentile 33 / cohort 1164

Distance 27.81 pc · percentile 6 / cohort 1171

ESI 0.561 · percentile 78 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

4.165 days

Semi-major axis

0.0348 AU

Eccentricity

—

Inclination

89.15 °

Year Length

A year here lasts approximately 4.16 Earth days (1.1% of a terrestrial year) at a mean orbital distance of 0.0348 AU.

Transit Fingerprint

Depth

0.261 %

Duration

1.352 h

Impact parameter b

0.346

Rp / R★

0.049510

Transit midpoint (BJD)

2,460,255.4185

Photometric dip

Transit produces a flux drop of 2,612 ppm lasting ≈ 1.35 h.

Extended Orbital Architecture

Planet / star radius ratio

0.049510

Semi-major axis / stellar radius

23.310

Impact parameter (b)

0.346

Transit mid-time (BJD)

2,460,255.4185

Angular separation (arcsec)

1.25000

Eq. Temperature

505K

(232 °C)

Insolation (S⊕)

11.91

Earth = 1.00

Earth Similarity (ESI)

0.561

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

Mistry et al. 2023

Instrument

TESS CCD Array

Publication

2023-11

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-5799

Spectral Class

M-type red dwarf

Effective Temperature

3,452 K — cooler than the Sun (5,778 K)

Estimated Age

9.60 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.321 R☉

Stellar Mass

0.325 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.936 dex

Stellar density

13.800 g/cm³

Metallicity ratio

[Fe/H]

Distance

27.81 parsec

Light-years 90.71 ly

V-band magnitude

13.29 mag

Voyager-speed travel 1,599,697 yr

Multi-band Host Photometry — 7 bands

Astrometric Data

Parallax

35.926 mas

Total Proper Motion

301.977 mas/yr

PM Right Ascension

177.64 mas/yr

PM Declination

244.21 mas/yr

Galactic Cartesian (pc)

x = 0.504 · y = -0.819 · z = 0.275

Equatorial (J2000)

RA 301.63018° · Dec 15.98914°

Galactic ℓ, b

55.924° · -8.610°

Ecliptic λ, β

308.164° · 35.332°

HTM-20 index

1523836595