Key parameters at a glance

A radius of 2.43 Earth radii
A mass of 6.50 Earth masses
Surface gravity around 1.10 g
An orbital period of 15.508 days
Equilibrium temperature 853 K (580 °C)
Distance from Earth 288.43 light-years
Earth Similarity Index 0.299
Travel time at Voyager 1 speed 5,086,529 years

TOI-1054.01 Planet Profile

Physical Specs

Radius

2.43 R⊕

Radius (Jupiter)

0.217 R♃

Mass

6.50 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.48 g/cm³

Surface Gravity

1.10 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.299

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#1278of 1978

top 64.6%

This planet

2.43R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-44 b 2.43 R⊕ K2-198 d 2.44 R⊕ Kepler-1739 b 2.43 R⊕

Metric	Earth	TOI-1054.01	Jupiter
Radius (R⊕)	1.00	2.43	11.21
Mass (M⊕)	1.00	6.50	317.83
Density (g/cm³)	5.51	2.48	1.33
Surface Gravity (g)	1.00	1.10	2.53
Insolation (S⊕)	1.00	88.07	0.037

Star Catalogue Identifiers

HIP

HIP 99212

TIC

TIC 366989877

Gaia DR2

Gaia DR2 6473033932942902528

Gaia DR3

Gaia DR3 6473033932942902528

System

TOI-1054

Percentile among Sub-Neptune cohort

Radius 2.434 R⊕ · percentile 35 / cohort 1978

Mass 6.500 M⊕ · percentile 33 / cohort 1978

Orbital period 15.51 d · percentile 51 / cohort 1946

Distance 88.43 pc · percentile 19 / cohort 1975

ESI 0.299 · percentile 28 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.508 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 15.51 Earth days (4.2% of a terrestrial year).

Transit Fingerprint

Depth

0.051 %

Duration

4.565 h

Transit midpoint (BJD)

2,460,122.7001

Photometric dip

Transit produces a flux drop of 513 ppm lasting ≈ 4.57 h.

Eq. Temperature

853K

(580 °C)

Insolation (S⊕)

88.07

Earth = 1.00

Earth Similarity (ESI)

0.299

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

Giacalone et al. 2021

Instrument

TESS CCD Array

Publication

2021-01

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-2257 b · Sub-Neptune TOI-2285 b · Super-Earth TOI-1231 b · Sub-Neptune AU Mic c · Sub-Neptune LHS 1678 c · Rocky Terrestrial LHS 1478 b · Rocky Terrestrial TOI-2406 b · Sub-Neptune HD 207897 b · Sub-Neptune TOI-269 b · Sub-Neptune TIC 172900988 b · Gas Giant TOI-178 g · Sub-Neptune TOI-2076 d · Sub-Neptune

Host System: TOI-1054

Spectral Class

F-type yellow-white

Effective Temperature

6,122 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.170 R☉

Stellar Mass

1.140 M☉

Metallicity [Fe/H]

—

Distance

88.43 parsec

Light-years 288.43 ly

V-band magnitude

8.95 mag

Voyager-speed travel 5,086,529 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

11.279 mas

Total Proper Motion

15.982 mas/yr

PM Right Ascension

1.59 mas/yr

PM Declination

-15.90 mas/yr

Galactic Cartesian (pc)

x = 0.310 · y = -0.494 · z = -0.812

Equatorial (J2000)

RA 302.11417° · Dec -54.31750°

Galactic ℓ, b

343.855° · -32.790°

Ecliptic λ, β

291.768° · -33.279°

HTM-20 index

-2136833701