Exoplanet

TOI-521 b

Orbiting TOI-521

Overview

TOI-521 b is an exoplanet orbiting the star TOI-521, discovered in 2025 using the Transit method. It is a Super-Earth world.

Key Measurements

Radius

1.98

Earth radii

015 R⊕

Mass

5.30

Earth masses

0500 M⊕

Orbital Period

1.5

days

0.1d10,000d

Distance

60.9

parsecs

Nearby10,000 pc

Equilibrium Temp

794

K

150 K3,500 K

Radius (Earth radii)

1.98

Mass (Earth masses)

5.30

Measured

Equilibrium Temperature

794 K

Orbital Period

1.54 days

Distance from Earth

60.9 pc (~199 ly)

Spectral Type

M3

Temperature

3544 K

Mass (Solar)

0.42 M☉

Radius (Solar)

0.42 R☉

Luminosity

-1.60 log L☉

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

123.3443°, 12.2221°

Discovery Method

Transit

Discovery Year

2025

Data Sources
NASA Exoplanet Archive

Source ID: TOI-521 b

System Context

TOI-521 b orbits TOI-521 and was reported in 2025 and was detected with the Transit method.

Published measurements list a radius of 1.98 Earth radii, a mass of 5.3 Earth masses, an orbital period of 1.54 days, and an equilibrium temperature near 794 K.

Catalog data places the system at about 60.9 parsecs from Earth, a host star classified as M3, 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-521