TOI-198 b
Orbiting TOI-198
TOI-198 b is an exoplanet orbiting the star TOI-198, discovered in 2023 using the Transit method. It is a Earth-sized world.
Radius
1.36
Earth radii
Mass
3.17
Earth masses
Orbital Period
10.2
days
Distance
23.7
parsecs
Equilibrium Temp
456
K
Radius (Earth radii)
1.36
Mass (Earth masses)
3.17
Measured
Equilibrium Temperature
456 K
Parameter source: Zapatero Osorio et al. 2026
Orbital Period
10.215+0.000−0.000days
Semi-Major Axis
0.0675+0.0067−0.0082au
Planet Mass (Earth masses)
3.17+0.64−0.65
Planet Mass (Jupiter masses)
0.0100+0.0020−0.0020
Eccentricity
<0.15
Epoch of Periastron
2458356.37+0.00−0.00days(JD)
Argument of Periastron
90.0deg
Radial Velocity Semi-Amplitude
1.67+0.21−0.24m/s
Distance from Earth
23.7 pc (~77 ly)
Spectral Type
Unknown
Temperature
3801 K
Mass (Solar)
0.42 M☉
Radius (Solar)
0.42 R☉
Luminosity
-1.48 log L☉
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
2.2715°, -27.1217°
Discovery Method
Transit
Discovery Year
2023
Source ID: TOI-198 b
TOI-198 b orbits TOI-198 and was reported in 2023 and was detected with the Transit method.
Published measurements list a radius of 1.36 Earth radii, a mass of 3.17 Earth masses, an orbital period of 10.22 days, and an equilibrium temperature near 456 K.
Catalog data places the system at about 23.7 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-198