Key parameters at a glance

A radius of 1.30 Earth radii
A mass of 2.24 Earth masses
Surface gravity around 1.33 g
An orbital period of 0.736 days
Semi-major axis 0.0112 AU
Equilibrium temperature 910 K (637 °C)
Distance from Earth 155.73 light-years
Earth Similarity Index 0.343
Travel time at Voyager 1 speed 2,746,264 years
Almost certainly tidally locked to its host star given the close orbit

TOI-206 b Planet Profile

Physical Specs

Radius

1.30 R⊕

Radius (Jupiter)

0.116 R♃

Mass

2.24 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.60 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.343

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

#1090of 1176

top 92.6%

This planet

1.30R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1568 b 1.30 R⊕ Kepler-796 b 1.30 R⊕ Kepler-1254 c 1.30 R⊕

Metric	Earth	TOI-206 b	Jupiter
Radius (R⊕)	1.00	1.30	11.21
Mass (M⊕)	1.00	2.24	317.83
Density (g/cm³)	5.51	5.60	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	117.76	0.037

Star Catalogue Identifiers

TIC

TIC 55650590

Gaia DR2

Gaia DR2 4665277593852295424

Gaia DR3

Gaia DR3 4665277593852295424

System

TOI-206

Percentile among Super-Earth cohort

Radius 1.300 R⊕ · percentile 7 / cohort 1176

Mass 2.240 M⊕ · percentile 7 / cohort 1176

Orbital period 0.74 d · percentile 3 / cohort 1164

Distance 47.75 pc · percentile 11 / cohort 1171

ESI 0.343 · percentile 49 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

0.736 days

Semi-major axis

0.0112 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts roughly 17.7 hours long at a mean orbital distance of 0.0112 AU.

Transit Fingerprint

Depth

0.132 %

Duration

0.674 h

Impact parameter b

0.660

Transit midpoint (BJD)

2,458,325.5431

Photometric dip

Transit produces a flux drop of 1,323 ppm lasting ≈ 0.67 h.

Eq. Temperature

910K

(637 °C)

Insolation (S⊕)

117.76

Earth = 1.00

Earth Similarity (ESI)

0.343

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Giacalone et al. 2022

Instrument

TESS CCD Array

Publication

2022-02

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-206

Spectral Class

M-type red dwarf

Effective Temperature

3,383 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.350 R☉

Stellar Mass

0.350 M☉

Metallicity [Fe/H]

—

Distance

47.75 parsec

Light-years 155.73 ly

V-band magnitude

14.94 mag

Voyager-speed travel 2,746,264 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

20.915 mas

Total Proper Motion

153.475 mas/yr

PM Right Ascension

105.97 mas/yr

PM Declination

111.02 mas/yr

Galactic Cartesian (pc)

x = 0.129 · y = 0.443 · z = -0.887

Equatorial (J2000)

RA 73.73822° · Dec -62.52187°

Galactic ℓ, b

272.538° · -37.185°

Ecliptic λ, β

22.487° · -81.961°

HTM-20 index

-1004081753