LHS 1903 d
Orbiting LHS 1903
LHS 1903 d is an exoplanet orbiting the star LHS 1903, discovered in 2026 using the Transit method. It is a Mini-Neptune world.
Radius
2.50
Earth radii
Mass
5.96
Earth masses
Orbital Period
12.6
days
Distance
35.7
parsecs
Equilibrium Temp
442
K
Radius (Earth radii)
2.50
Mass (Earth masses)
5.96
Measured
Equilibrium Temperature
442 K
Parameter source: Wilson et al. 2026
Orbital Period
12.566+0.000−0.000days
Semi-Major Axis
0.0860+0.0018−0.0019au
Planet Mass (Earth masses)
5.96+1.15−1.13
Planet Mass (Jupiter masses)
0.0188+0.0036−0.0036
Eccentricity
0.1120+0.0550−0.0440
Argument of Periastron
233.0+29.0−19.0deg
Radial Velocity Semi-Amplitude
2.48+0.46−0.46m/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 d
LHS 1903 d orbits LHS 1903 and was reported in 2026 and was detected with the Transit method.
Published measurements list a radius of 2.5 Earth radii, a mass of 5.96 Earth masses, an orbital period of 12.57 days, and an equilibrium temperature near 442 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