Exoplanet

TOI-1291 b

Orbiting TOI-1291

Overview

TOI-1291 b is an exoplanet orbiting the star TOI-1291, discovered in 2026 using the Transit method. It is a Neptune-sized world.

Key Measurements

Radius

5.64

Earth radii

015 R⊕

Mass (est.)

28.80

Earth masses

0500 M⊕

Orbital Period

7.2

days

0.1d10,000d

Distance

428.1

parsecs

Nearby10,000 pc

Radius (Earth radii)

5.64

Mass (Earth masses)

28.80

Estimated

Equilibrium Temperature

Unknown

Parameter source: Lafarga et al. 2026

Orbital Period

7.162+0.000−0.000days

Distance from Earth

428.1 pc (~1396 ly)

Spectral Type

Unknown

Temperature

6140 K

Mass (Solar)

Unknown

Radius (Solar)

1.81 R☉

Luminosity

Unknown

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

245.8180°, 62.9251°

Discovery Method

Transit

Discovery Year

2026

Data Sources
NASA Exoplanet Archive

Source ID: TOI-1291 b

System Context

TOI-1291 b orbits TOI-1291 and was reported in 2026 and was detected with the Transit method.

Published measurements list a radius of 5.64 Earth radii, a mass of 28.8 Earth masses (estimated), and an orbital period of 7.16 days.

Catalog data places the system at about 428.1 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-1291