Exoplanet

TOI-5422 b

Orbiting TOI-5422

Overview

TOI-5422 b is an exoplanet orbiting the star TOI-5422, discovered in 2026 using the Transit method. It is a Neptune-sized world.

Key Measurements

Radius

9.10

Earth radii

015 R⊕

Mass

8899.20

Earth masses

0500 M⊕

Orbital Period

5.4

days

0.1d10,000d

Distance

346.1

parsecs

Nearby10,000 pc

Equilibrium Temp

1369

K

150 K3,500 K

Radius (Earth radii)

9.10

Mass (Earth masses)

8899.20

Measured

Equilibrium Temperature

1369 K

Parameter source: Zhang et al. 2026

Orbital Period

5.377+0.000−0.000days

Semi-Major Axis

0.0619+0.0018−0.0013au

Planet Mass (Earth masses)

8899.20+508.53−381.39

Planet Mass (Jupiter masses)

28.0000+1.6000−1.2000

Eccentricity

0.0940+0.0047−0.0045

Epoch of Periastron

2459541.07+0.09−0.09days(BJD-TDB)

Argument of Periastron

0.1+5.9−5.9deg

Radial Velocity Semi-Amplitude

3068.00+22.00−23.00m/s

Distance from Earth

346.1 pc (~1129 ly)

Spectral Type

Unknown

Temperature

5820 K

Mass (Solar)

1.07 M☉

Radius (Solar)

1.47 R☉

Luminosity

0.35 log L☉

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

86.8436°, 25.6260°

Discovery Method

Transit

Discovery Year

2026

Data Sources
NASA Exoplanet Archive

Source ID: TOI-5422 b

System Context

TOI-5422 b orbits TOI-5422 and was reported in 2026 and was detected with the Transit method.

Published measurements list a radius of 9.1 Earth radii, a mass of 8,899.2 Earth masses, an orbital period of 5.38 days, and an equilibrium temperature near 1,369 K.

Catalog data places the system at about 346.1 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-5422