Key parameters at a glance

A radius of 5.35 Earth radii
A mass of 24.80 Earth masses
Surface gravity around 0.87 g
An orbital period of 12.214 days
Equilibrium temperature 808 K (535 °C)
Distance from Earth 643.32 light-years
Earth Similarity Index 0.227
Travel time at Voyager 1 speed 11,344,945 years

TOI-5174 b Planet Profile

Physical Specs

Radius

5.35 R⊕

Radius (Jupiter)

0.477 R♃

Mass

24.80 M⊕

Mass (Jupiter)

0.078 M♃

Density

0.89 g/cm³

Surface Gravity

0.87 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.227

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

#333of 574

top 57.8%

This planet

5.35R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-33 d 5.35 R⊕ TOI-1694 b 5.34 R⊕ Kepler-82 c 5.34 R⊕

Metric	Earth	TOI-5174 b	Jupiter
Radius (R⊕)	1.00	5.35	11.21
Mass (M⊕)	1.00	24.80	317.83
Density (g/cm³)	5.51	0.89	1.33
Surface Gravity (g)	1.00	0.87	2.53
Insolation (S⊕)	1.00	100.91	0.037

Star Catalogue Identifiers

TIC

TIC 49428710

Gaia DR2

Gaia DR2 3793743895297313408

Gaia DR3

Gaia DR3 3793743895297313408

System

TOI-5174

Percentile among Neptune-like cohort

Radius 5.351 R⊕ · percentile 42 / cohort 574

Mass 24.800 M⊕ · percentile 41 / cohort 574

Orbital period 12.21 d · percentile 41 / cohort 524

Distance 197.24 pc · percentile 39 / cohort 572

ESI 0.227 · percentile 34 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

12.214 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 12.21 Earth days (3.3% of a terrestrial year).

Transit Fingerprint

Depth

0.167 %

Duration

4.888 h

Transit midpoint (BJD)

2,459,527.2965

Photometric dip

Transit produces a flux drop of 1,670 ppm lasting ≈ 4.89 h.

Eq. Temperature

808K

(535 °C)

Insolation (S⊕)

100.91

Earth = 1.00

Earth Similarity (ESI)

0.227

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Mantovan et al. 2022

Instrument

TESS CCD Array

Publication

2022-11

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-5174

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,644 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.095 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

0.42

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

1.075 g/cm³

Metallicity ratio

[M/H]

Distance

197.24 parsec

Light-years 643.32 ly

V-band magnitude

11.58 mag

Voyager-speed travel 11,344,945 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

5.042 mas

Total Proper Motion

71.117 mas/yr

PM Right Ascension

6.79 mas/yr

PM Declination

-70.79 mas/yr

Galactic Cartesian (pc)

x = -0.994 · y = 0.103 · z = -0.035

Equatorial (J2000)

RA 174.10950° · Dec -2.02335°

Galactic ℓ, b

268.175° · 55.703°

Ecliptic λ, β

175.392° · -4.197°

HTM-20 index

-1359233275