Key parameters at a glance

A radius of 2.82 Earth radii
A mass of 9.30 Earth masses
Surface gravity around 1.17 g
An orbital period of 12.564 days
Semi-major axis 0.1079 AU
Equilibrium temperature 1,143 K (870 °C)
Distance from Earth 258.99 light-years
Earth Similarity Index 0.209
Travel time at Voyager 1 speed 4,567,301 years

1 sibling around TOI-6054

TOI-6054.02 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-6054.01	Sub-Neptune	2.64	12.50	7.501	1,360	2024
TOI-6054.02 this	Sub-Neptune	2.82	9.30	12.564	1,143	2024

TOI-6054.02 Planet Profile

Physical Specs

Radius

2.82 R⊕

Radius (Jupiter)

0.252 R♃

Mass

9.30 M⊕

Mass (Jupiter)

0.029 M♃

Density

2.25 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.209

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

#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-6054.02	Jupiter
Radius (R⊕)	1.00	2.82	11.21
Mass (M⊕)	1.00	9.30	317.83
Density (g/cm³)	5.51	2.25	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	285.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	9.300 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HIP

HIP 17540

TIC

TIC 392681545

Gaia DR2

Gaia DR2 474143193821024256

Gaia DR3

Gaia DR3 474143193821024256

System

TOI-6054

Percentile among Sub-Neptune cohort

Radius 2.820 R⊕ · percentile 63 / cohort 1978

Mass 9.300 M⊕ · percentile 67 / cohort 1978

Orbital period 12.56 d · percentile 43 / cohort 1946

Distance 79.41 pc · percentile 17 / cohort 1975

ESI 0.209 · percentile 8 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

12.564 days

Semi-major axis

0.1079 AU

Eccentricity

0.332

Inclination

88.82 °

Year Length

A year here lasts approximately 12.56 Earth days (3.4% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1079 AU.

Transit Fingerprint

Depth

0.024 %

Duration

6.620 h

Impact parameter b

0.280

Rp / R★

0.015570

Transit midpoint (BJD)

2,458,826.8929

Photometric dip

Transit produces a flux drop of 243 ppm lasting ≈ 6.62 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015570

Semi-major axis / stellar radius

13.990

Impact parameter (b)

0.280

RV semi-amplitude (K)

2.530 m/s

Transit mid-time (BJD)

2,458,826.8929

Long. of periastron (ω)

-163.00°

Angular separation (arcsec)

1.36000

Eq. Temperature

1,143K

(870 °C)

Insolation (S⊕)

285.00

Earth = 1.00

Earth Similarity (ESI)

0.209

0 = alien, 1 = Earth-identical

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

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Crossfield et al. 2024

Instrument

TESS CCD Array

Publication

2024-11

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-6054

Spectral Class

F-type yellow-white

Effective Temperature

6,047 K — hotter than the Sun (5,778 K)

Estimated Age

6.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.662 R☉

Stellar Mass

1.107 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.100 dex

Stellar density

0.340 g/cm³

Rotational v·sin i

6.69 km/s

Metallicity ratio

[Fe/H]

Distance

79.41 parsec

Light-years 258.99 ly

V-band magnitude

8.02 mag

Voyager-speed travel 4,567,301 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

12.565 mas

Total Proper Motion

55.196 mas/yr

PM Right Ascension

-54.99 mas/yr

PM Declination

-4.79 mas/yr

Galactic Cartesian (pc)

x = 0.274 · y = 0.412 · z = 0.869

Equatorial (J2000)

RA 56.33701° · Dec 60.35092°

Galactic ℓ, b

142.893° · 4.405°

Ecliptic λ, β

69.238° · 39.315°

HTM-20 index

1723301027