Key parameters at a glance

A radius of 1.25 Earth radii
A mass of 1.55 Earth masses
Surface gravity around 0.99 g
An orbital period of 7.587 days
Semi-major axis 0.0509 AU
Equilibrium temperature 400 K (126 °C)
Distance from Earth 73.53 light-years
Earth Similarity Index 0.736
Travel time at Voyager 1 speed 1,296,763 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around TOI-4336 A

TOI-4336 A 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-4336 A c this	Super-Earth	1.25	1.55	7.587	400	2026
TOI-4336 A b	Sub-Neptune	2.14	3.33	16.336	309	2024

TOI-4336 A c Planet Profile

Physical Specs

Radius

1.25 R⊕

Radius (Jupiter)

0.112 R♃

Mass

1.55 M⊕

Mass (Jupiter)

0.005 M♃

Density

4.35 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.736

HZ Position Inner

Controversial No

Discovery

Year 2026

Method Transit

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1160of 1176

top 98.6%

This planet

1.25R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-445 d 1.25 R⊕ Kepler-1074 b 1.25 R⊕ Kepler-150 b 1.25 R⊕

Metric	Earth	TOI-4336 A c	Jupiter
Radius (R⊕)	1.00	1.25	11.21
Mass (M⊕)	1.00	1.55	317.83
Density (g/cm³)	5.51	4.35	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	4.24	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1.550 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 166184428

Gaia DR2

Gaia DR2 6113245033656232448

Gaia DR3

Gaia DR3 6113245033656232448

System

TOI-4336

Percentile among Super-Earth cohort

Radius 1.251 R⊕ · percentile 1 / cohort 1176

Mass 1.550 M⊕ · percentile 1 / cohort 1176

Orbital period 7.59 d · percentile 55 / cohort 1164

Distance 22.55 pc · percentile 4 / cohort 1171

ESI 0.736 · percentile 86 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.587 days

Semi-major axis

0.0509 AU

Eccentricity

0.000

Inclination

89.64 °

Year Length

A year here lasts approximately 7.59 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0509 AU.

Transit Fingerprint

Duration

1.740 h

Impact parameter b

0.210

Rp / R★

0.035200

Transit midpoint (BJD)

2,459,333.2931

Extended Orbital Architecture

Planet / star radius ratio

0.035200

Impact parameter (b)

0.210

RV semi-amplitude (K)

1.114 m/s

Transit mid-time (BJD)

2,459,333.2931

Long. of periastron (ω)

90.00°

Angular separation (arcsec)

2.26000

Eq. Temperature

400K

(126 °C)

Insolation (S⊕)

4.24

Earth = 1.00

Earth Similarity (ESI)

0.736

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.

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

Parc et al. 2026

Instrument

Multiple Instruments

Publication

2026-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2026 at Multiple Observatories (12 shown).

DMPP-6 b · Sub-Neptune GJ 887 d · Sub-Neptune HD 176986 d · Sub-Neptune GJ 887 e · Rocky Terrestrial DMPP-6 c · Sub-Neptune DMPP-9 b · Sub-Neptune TOI-5789 d · Super-Earth TOI-5789 e · Sub-Neptune HD 85426 c · Sub-Neptune DMPP-2 c · Neptune-like DMPP-7 b · Neptune-like TOI-375 d · Gas Giant

Host System: TOI-4336 A

Spectral Class

M-type red dwarf

Effective Temperature

3,307 K — cooler than the Sun (5,778 K)

Estimated Age

6.70 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.326 R☉

Stellar Mass

0.306 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.897 dex

Stellar density

12.450 g/cm³

Systemic radial velocity

18.38 km/s

Rotation period

35.50 days

Metallicity ratio

[Fe/H]

Distance

22.55 parsec

Light-years 73.53 ly

V-band magnitude

13.60 mag

Voyager-speed travel 1,296,763 yr

Multi-band Host Photometry — 10 bands

Astrometric Data

Parallax

44.326 mas

Total Proper Motion

166.499 mas/yr

PM Right Ascension

151.52 mas/yr

PM Declination

69.02 mas/yr

Galactic Cartesian (pc)

x = -0.684 · y = -0.335 · z = -0.647

Equatorial (J2000)

RA 206.10701° · Dec -40.33735°

Galactic ℓ, b

313.747° · 21.419°

Ecliptic λ, β

219.545° · -27.416°

HTM-20 index

1544241962