LHS 1903 b
Orbiting LHS 1903
LHS 1903 b is an exoplanet orbiting the star LHS 1903, discovered in 2026 using the Transit method. It is a Earth-sized world.
Radius
1.38
Earth radii
Mass
3.28
Earth masses
Orbital Period
2.2
days
Distance
35.7
parsecs
Equilibrium Temp
796
K
Radius (Earth radii)
1.38
Mass (Earth masses)
3.28
Measured
Equilibrium Temperature
796 K
Parameter source: Wilson et al. 2026
Orbital Period
2.156+0.000−0.000days
Semi-Major Axis
0.0266+0.0006−0.0006au
Planet Mass (Earth masses)
3.28+0.42−0.42
Planet Mass (Jupiter masses)
0.0103+0.0013−0.0013
Eccentricity
0.0150+0.0140−0.0100
Argument of Periastron
216.0+80.0−87.0deg
Radial Velocity Semi-Amplitude
2.46+0.30−0.30m/s
Distance from Earth
35.7 pc (~116 ly)
Spectral Type
M
Temperature
3664 K
Mass (Solar)
0.54 M☉
Radius (Solar)
0.54 R☉
Luminosity
Unknown
Planets in System
4
Stars in System
1
Coordinates (RA, Dec)
107.8658°, 48.3279°
Discovery Method
Transit
Discovery Year
2026
Source ID: LHS 1903 b
LHS 1903 b orbits LHS 1903 and was reported in 2026 and was detected with the Transit method.
Published measurements list a radius of 1.38 Earth radii, a mass of 3.28 Earth masses, an orbital period of 2.16 days, and an equilibrium temperature near 796 K.
Catalog data places the system at about 35.7 parsecs from Earth, a host star classified as M, and 4 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open LHS 1903More planets in this system