Key parameters at a glance

A radius of 1.45 Earth radii
A mass of 4.04 Earth masses
Surface gravity around 1.92 g
An orbital period of 2.470 days
Equilibrium temperature 1,364 K (1091 °C)
Distance from Earth 171.62 light-years
Earth Similarity Index 0.204
Travel time at Voyager 1 speed 3,026,577 years

TOI-1011 b Planet Profile

Physical Specs

Radius

1.45 R⊕

Radius (Jupiter)

0.129 R♃

Mass

4.04 M⊕

Mass (Jupiter)

0.013 M♃

Density

7.28 g/cm³

Surface Gravity

1.92 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.204

HZ Position Inner

Controversial No

Discovery

Year 2025

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#837of 1176

top 71.1%

This planet

1.45R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1226 b 1.45 R⊕ Kepler-361 b 1.45 R⊕ Kepler-375 b 1.45 R⊕

Metric	Earth	TOI-1011 b	Jupiter
Radius (R⊕)	1.00	1.45	11.21
Mass (M⊕)	1.00	4.04	317.83
Density (g/cm³)	5.51	7.28	1.33
Surface Gravity (g)	1.00	1.92	2.53
Insolation (S⊕)	1.00	575.60	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4.040 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HIP

HIP 36964

TIC

TIC 114018671

Gaia DR2

Gaia DR2 5592015297342611968

Gaia DR3

Gaia DR3 5592015297342611968

System

TOI-1011

Percentile among Super-Earth cohort

Radius 1.450 R⊕ · percentile 28 / cohort 1176

Mass 4.040 M⊕ · percentile 75 / cohort 1176

Orbital period 2.47 d · percentile 16 / cohort 1164

Distance 52.62 pc · percentile 11 / cohort 1171

ESI 0.204 · percentile 13 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.470 days

Semi-major axis

— AU

Eccentricity

0.000

Inclination

— °

Year Length

A year here lasts approximately 2.47 Earth days (0.7% of a terrestrial year) on a nearly circular orbit.

Transit Fingerprint

Depth

0.027 %

Duration

2.302 h

Impact parameter b

0.240

Rp / R★

0.014300

Transit midpoint (BJD)

2,458,489.9776

Photometric dip

Transit produces a flux drop of 273 ppm lasting ≈ 2.30 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014300

Impact parameter (b)

0.240

RV semi-amplitude (K)

2.030 m/s

Transit mid-time (BJD)

2,458,489.9776

Eq. Temperature

1,364K

(1091 °C)

Insolation (S⊕)

575.60

Earth = 1.00

Earth Similarity (ESI)

0.204

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

Brinkman et al. 2025

Instrument

TESS CCD Array

Publication

2025-08

Observation locale

Space

Discovery cohort

Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-1266 d · Super-Earth TOI-2267 c · Rocky Terrestrial TOI-5799 c · Super-Earth TOI-5728 b · Super-Earth TOI-5716 b · Rocky Terrestrial TOI-7166 b · Sub-Neptune TOI-2267 b · Rocky Terrestrial TOI-2093 c · Sub-Neptune TOI-2267 d · Super-Earth TOI-5489 c · Super-Earth TOI-1743 b · Super-Earth TOI-4364 b · Sub-Neptune

Host System: TOI-1011

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,475 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.920 R☉

Stellar Mass

0.910 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

1.589 g/cm³

Metallicity ratio

[Fe/H]

Distance

52.62 parsec

Light-years 171.62 ly

V-band magnitude

8.94 mag

Voyager-speed travel 3,026,577 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

18.975 mas

Total Proper Motion

198.123 mas/yr

PM Right Ascension

145.10 mas/yr

PM Declination

-134.90 mas/yr

Galactic Cartesian (pc)

x = -0.342 · y = 0.768 · z = -0.542

Equatorial (J2000)

RA 113.98476° · Dec -32.84200°

Galactic ℓ, b

246.957° · -5.913°

Ecliptic λ, β

124.951° · -53.409°

HTM-20 index

-659601187