Exoplanet

TOI-251 b

Orbiting TOI-251

Overview

TOI-251 b is an exoplanet orbiting the star TOI-251, discovered in 2021 using the Transit method. It is a Mini-Neptune world.

Key Measurements

Radius

2.74

Earth radii

015 R⊕

Mass

317.83

Earth masses

0500 M⊕

Orbital Period

4.9

days

0.1d10,000d

Distance

99.5

parsecs

Nearby10,000 pc

Radius (Earth radii)

2.74

Mass (Earth masses)

317.83

Measured

Equilibrium Temperature

Unknown

Parameter source: Zhou et al. 2021

Orbital Period

4.938+0.000−0.000days

Semi-Major Axis

0.0574+0.0002−0.0002au

Planet Mass (Earth masses)

317.83

Planet Mass (Jupiter masses)

1.0000

Eccentricity

0.0000

Radial Velocity Semi-Amplitude

<120m/s

Distance from Earth

99.5 pc (~325 ly)

Spectral Type

Unknown

Temperature

5875 K

Mass (Solar)

1.04 M☉

Radius (Solar)

0.88 R☉

Luminosity

-0.08 log L☉

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

353.0621°, -37.2559°

Discovery Method

Transit

Discovery Year

2021

Data Sources
NASA Exoplanet Archive

Source ID: TOI-251 b

System Context

TOI-251 b orbits TOI-251 and was reported in 2021 and was detected with the Transit method.

Published measurements list a radius of 2.74 Earth radii, a mass of 317.83 Earth masses, and an orbital period of 4.94 days.

Catalog data places the system at about 99.5 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-251