Exoplanet

TOI-333 b

Orbiting TOI-333

Overview

TOI-333 b is an exoplanet orbiting the star TOI-333, discovered in 2025 using the Transit method. It is a Neptune-sized world.

Key Measurements

Radius

4.26

Earth radii

015 R⊕

Mass

20.10

Earth masses

0500 M⊕

Orbital Period

3.8

days

0.1d10,000d

Distance

352.3

parsecs

Nearby10,000 pc

Equilibrium Temp

1445

K

150 K3,500 K

Radius (Earth radii)

4.26

Mass (Earth masses)

20.10

Measured

Equilibrium Temperature

1445 K

Parameter source: Alves et al. 2026

Orbital Period

3.785+0.000−0.000days

Semi-Major Axis

0.0490+0.0010−0.0010au

Planet Mass (Earth masses)

20.10+2.40−2.40

Planet Mass (Jupiter masses)

0.0632+0.0076−0.0076

Eccentricity

0.0000

Argument of Periastron

90.0deg

Radial Velocity Semi-Amplitude

7.90+0.87−0.87m/s

Distance from Earth

352.3 pc (~1149 ly)

Spectral Type

Unknown

Temperature

6241 K

Mass (Solar)

1.20 M☉

Radius (Solar)

1.10 R☉

Luminosity

Unknown

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

353.3575°, -41.1715°

Discovery Method

Transit

Discovery Year

2025

Data Sources
NASA Exoplanet Archive

Source ID: TOI-333 b

System Context

TOI-333 b orbits TOI-333 and was reported in 2025 and was detected with the Transit method.

Published measurements list a radius of 4.26 Earth radii, a mass of 20.1 Earth masses, an orbital period of 3.79 days, and an equilibrium temperature near 1,445 K.

Catalog data places the system at about 352.3 parsecs from Earth and 1 known planet in the system.

Host star

Explore the stellar record for this system to compare temperature, spectral type, and known planets.

Open TOI-333
TOI-333 b