Key parameters at a glance

A radius of 8.88 Earth radii
A mass of 58.48 Earth masses
Surface gravity around 0.74 g
An orbital period of 30.356 days
Semi-major axis 0.1940 AU
Distance from Earth 1,071.76 light-years
Earth Similarity Index 0.331
Travel time at Voyager 1 speed 18,900,516 years

1 sibling around TOI-1232

TOI-1232 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-1232 b	Gas Giant	10.93	220.57	14.256	786	2026
TOI-1232 c this	Neptune-like	8.88	58.48	30.356	—	2026

TOI-1232 c Planet Profile

Physical Specs

Radius

8.88 R⊕

Radius (Jupiter)

0.792 R♃

Mass

58.48 M⊕

Mass (Jupiter)

0.184 M♃

Density

0.46 g/cm³

Surface Gravity

0.74 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.331

HZ Position Unknown

Controversial No

Discovery

Year 2026

Method Transit Timing Variations

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#98of 574

top 16.9%

This planet

8.88R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-890 b 8.89 R⊕ KOI-1783.01 8.86 R⊕ Kepler-491 b 8.92 R⊕

Metric	Earth	TOI-1232 c	Jupiter
Radius (R⊕)	1.00	8.88	11.21
Mass (M⊕)	1.00	58.48	317.83
Density (g/cm³)	5.51	0.46	1.33
Surface Gravity (g)	1.00	0.74	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	58.480 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 364395234

Gaia DR2

Gaia DR2 5289147737059634560

Gaia DR3

Gaia DR3 5289147737059634560

System

TOI-1232

Percentile among Neptune-like cohort

Radius 8.880 R⊕ · percentile 83 / cohort 574

Mass 58.480 M⊕ · percentile 77 / cohort 574

Orbital period 30.36 d · percentile 60 / cohort 524

Distance 328.60 pc · percentile 49 / cohort 572

ESI 0.331 · percentile 58 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

30.356 days

Semi-major axis

0.1940 AU

Eccentricity

0.027

Inclination

87.99 °

Year Length

A year here lasts approximately 30.36 Earth days (8.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1940 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.331

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Mihaylov et al. 2026

Instrument

TESS CCD Array

Publication

2026-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2026 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-2094 b · Super-Earth TOI-6716 b · Rocky Terrestrial TOI-1080 b · Rocky Terrestrial TOI-1243 b · Sub-Neptune TOI-4529 b · Super-Earth TOI-7384 b · Sub-Neptune LHS 1903 d · Sub-Neptune LHS 1903 c · Sub-Neptune TOI-5734 b · Sub-Neptune TOI-5788 c · Sub-Neptune LHS 1903 b · Super-Earth TOI-5788 b · Super-Earth

Host System: TOI-1232

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,823 K — hotter than the Sun (5,778 K)

Estimated Age

4.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.072 R☉

Stellar Mass

1.058 M☉

Metallicity [Fe/H]

0.18

Extended Stellar Properties

Surface gravity (log g)

4.403 dex

Stellar density

1.125 g/cm³

Rotational v·sin i

4.13 km/s

Metallicity ratio

[Fe/H]

Distance

328.60 parsec

Light-years 1,071.76 ly

V-band magnitude

12.68 mag

Voyager-speed travel 18,900,516 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.014 mas

Total Proper Motion

26.244 mas/yr

PM Right Ascension

-2.33 mas/yr

PM Declination

26.14 mas/yr

Galactic Cartesian (pc)

x = -0.210 · y = 0.422 · z = -0.882

Equatorial (J2000)

RA 116.50140° · Dec -61.87979°

Galactic ℓ, b

274.204° · -17.651°

Ecliptic λ, β

170.238° · -77.678°

HTM-20 index

138860185