Key parameters at a glance

A radius of 2.13 Earth radii
A mass of 4.10 Earth masses
Surface gravity around 0.91 g
An orbital period of 15.532 days
Semi-major axis 0.0861 AU
Equilibrium temperature 338 K (65 °C)
Distance from Earth 80.69 light-years
Earth Similarity Index 0.703
Travel time at Voyager 1 speed 1,422,980 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around TOI-1468

TOI-1468 c 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-1468 b	Super-Earth	1.40	3.04	1.881	684	2022
TOI-1468 c this	Sub-Neptune	2.13	4.10	15.532	338	2022

TOI-1468 c Planet Profile

Physical Specs

Radius

2.13 R⊕

Radius (Jupiter)

0.190 R♃

Mass

4.10 M⊕

Mass (Jupiter)

0.013 M♃

Density

2.31 g/cm³

Surface Gravity

0.91 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.703

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

#1779of 1978

top 89.9%

This planet

2.13R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-215 b 2.12 R⊕ Kepler-200 b 2.13 R⊕ TOI-2120 b 2.12 R⊕

Metric	Earth	TOI-1468 c	Jupiter
Radius (R⊕)	1.00	2.13	11.21
Mass (M⊕)	1.00	4.10	317.83
Density (g/cm³)	5.51	2.31	1.33
Surface Gravity (g)	1.00	0.91	2.53
Insolation (S⊕)	1.00	2.13	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4.100 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	4.100 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 243185500

Gaia DR2

Gaia DR2 2785466581298775680

Gaia DR3

Gaia DR3 2785466581298775680

System

TOI-1468

Percentile among Sub-Neptune cohort

Radius 2.126 R⊕ · percentile 10 / cohort 1978

Mass 4.100 M⊕ · percentile 1 / cohort 1978

Orbital period 15.53 d · percentile 52 / cohort 1946

Distance 24.74 pc · percentile 6 / cohort 1975

ESI 0.703 · percentile 93 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.532 days

Semi-major axis

0.0861 AU

Eccentricity

0.111

Inclination

89.22 °

Year Length

A year here lasts approximately 15.53 Earth days (4.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0861 AU.

Transit Fingerprint

Depth

0.276 %

Duration

1.860 h

Impact parameter b

0.664

Rp / R★

0.052600

Transit midpoint (BJD)

2,458,766.9267

Photometric dip

Transit produces a flux drop of 2,760 ppm lasting ≈ 1.86 h.

Extended Orbital Architecture

Planet / star radius ratio

0.052600

Semi-major axis / stellar radius

49.800

Impact parameter (b)

0.664

RV semi-amplitude (K)

2.120 m/s

Transit mid-time (BJD)

2,458,766.9267

Long. of periastron (ω)

130.00°

Angular separation (arcsec)

3.48000

Eq. Temperature

338K

(65 °C)

Insolation (S⊕)

2.13

Earth = 1.00

Earth Similarity (ESI)

0.703

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure. Close-orbiting tidally-locked around a cool host.

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

Chaturvedi et al. 2022

Instrument

TESS CCD Array

Publication

2022-10

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-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 TOI-1246 e · Sub-Neptune

Host System: TOI-1468

Spectral Class

M-type red dwarf

Effective Temperature

3,376 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.371 R☉

Stellar Mass

0.353 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.846 dex

Stellar density

9.700 g/cm³

Rotational v·sin i

2.00 km/s

Rotation period

42.50 days

Metallicity ratio

[Fe/H]

Distance

24.74 parsec

Light-years 80.69 ly

V-band magnitude

12.50 mag

Voyager-speed travel 1,422,980 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

40.392 mas

Total Proper Motion

226.524 mas/yr

PM Right Ascension

-41.46 mas/yr

PM Declination

-222.70 mas/yr

Galactic Cartesian (pc)

x = 0.905 · y = 0.271 · z = 0.329

Equatorial (J2000)

RA 16.65387° · Dec 19.22492°

Galactic ℓ, b

127.874° · -43.501°

Ecliptic λ, β

22.742° · 11.213°

HTM-20 index

-1296103795