HD 28109 b
Orbiting HD 28109
HD 28109 b is an exoplanet orbiting the star HD 28109, discovered in 2022 using the Transit method. It is a Mini-Neptune world.
Radius
2.69
Earth radii
Mass
6.20
Earth masses
Orbital Period
22.9
days
Distance
139.6
parsecs
Equilibrium Temp
867
K
Radius (Earth radii)
2.69
Mass (Earth masses)
6.20
Measured
Equilibrium Temperature
867 K
Parameter source: Barone et al. 2025
Orbital Period
22.891+0.000−0.000days
Planet Mass (Earth masses)
6.20+1.60−1.60
Planet Mass (Jupiter masses)
0.0195+0.0050−0.0050
Eccentricity
0.0071+0.0475−0.0071
Argument of Periastron
-93.0+54.0−54.0deg
Radial Velocity Semi-Amplitude
1.22+0.31−0.31m/s
Distance from Earth
139.6 pc (~455 ly)
Spectral Type
F8
Temperature
6189 K
Mass (Solar)
1.23 M☉
Radius (Solar)
1.43 R☉
Luminosity
0.43 log L☉
Planets in System
3
Stars in System
1
Coordinates (RA, Dec)
65.2383°, -68.1027°
Discovery Method
Transit
Discovery Year
2022
Source ID: HD 28109 b
HD 28109 b orbits HD 28109 and was reported in 2022 and was detected with the Transit method.
Published measurements list a radius of 2.69 Earth radii, a mass of 6.2 Earth masses, an orbital period of 22.89 days, and an equilibrium temperature near 867 K.
Catalog data places the system at about 139.6 parsecs from Earth, a host star classified as F8, and 3 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open HD 28109More planets in this system