Key parameters at a glance

A radius of 2.91 Earth radii
A mass of 8.78 Earth masses
Surface gravity around 1.04 g
An orbital period of 8.054 days
Semi-major axis 0.0784 AU
Equilibrium temperature 878 K (605 °C)
Distance from Earth 318.84 light-years
Earth Similarity Index 0.271
Travel time at Voyager 1 speed 5,622,703 years

TOI-1772.01 Planet Profile

Physical Specs

Radius

2.91 R⊕

Radius (Jupiter)

0.259 R♃

Mass

8.78 M⊕

Mass (Jupiter)

0.028 M♃

Density

1.97 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.271

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

#617of 1978

top 31.1%

This planet

2.91R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-365 b 2.91 R⊕ K2-138 f 2.90 R⊕ Kepler-107 e 2.90 R⊕

Metric	Earth	TOI-1772.01	Jupiter
Radius (R⊕)	1.00	2.91	11.21
Mass (M⊕)	1.00	8.78	317.83
Density (g/cm³)	5.51	1.97	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	140.93	0.037

Star Catalogue Identifiers

TIC

TIC 85293053

Gaia DR2

Gaia DR2 749676822006222464

Gaia DR3

Gaia DR3 749676822006222464

System

TOI-1772

Percentile among Sub-Neptune cohort

Radius 2.905 R⊕ · percentile 69 / cohort 1978

Mass 8.780 M⊕ · percentile 63 / cohort 1978

Orbital period 8.05 d · percentile 26 / cohort 1946

Distance 97.76 pc · percentile 19 / cohort 1975

ESI 0.271 · percentile 21 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

8.054 days

Semi-major axis

0.0784 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 8.05 Earth days (2.2% of a terrestrial year) at a mean orbital distance of 0.0784 AU.

Transit Fingerprint

Depth

0.071 %

Duration

3.420 h

Rp / R★

0.026600

Transit midpoint (BJD)

2,459,628.8507

Photometric dip

Transit produces a flux drop of 707 ppm lasting ≈ 3.42 h.

Eq. Temperature

878K

(605 °C)

Insolation (S⊕)

140.93

Earth = 1.00

Earth Similarity (ESI)

0.271

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

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-1772

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,583 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.995 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

0.13

Extended Stellar Properties

Surface gravity (log g)

4.440 dex

Stellar density

1.416 g/cm³

Metallicity ratio

[M/H]

Distance

97.76 parsec

Light-years 318.84 ly

V-band magnitude

9.96 mag

Voyager-speed travel 5,622,703 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

10.201 mas

Total Proper Motion

43.800 mas/yr

PM Right Ascension

-39.42 mas/yr

PM Declination

-19.09 mas/yr

Galactic Cartesian (pc)

x = -0.759 · y = 0.325 · z = 0.565

Equatorial (J2000)

RA 156.83770° · Dec 34.39095°

Galactic ℓ, b

190.700° · 58.381°

Ecliptic λ, β

145.442° · 22.900°

HTM-20 index

591072471