HD 28109 d
Orbiting HD 28109
HD 28109 d is an exoplanet orbiting the star HD 28109, discovered in 2022 using the Transit method. It is a Mini-Neptune world.
Radius
3.11
Earth radii
Mass
5.80
Earth masses
Orbital Period
84.3
days
Distance
139.6
parsecs
Equilibrium Temp
561
K
Radius (Earth radii)
3.11
Mass (Earth masses)
5.80
Measured
Equilibrium Temperature
561 K
Parameter source: Barone et al. 2025
Orbital Period
84.290+0.002−0.002days
Planet Mass (Earth masses)
5.80+0.90−1.10
Planet Mass (Jupiter masses)
0.0182+0.0028−0.0035
Eccentricity
0.0054+0.0027−0.0036
Argument of Periastron
-72.0+42.0−27.0deg
Radial Velocity Semi-Amplitude
<1.24m/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 d
HD 28109 d orbits HD 28109 and was reported in 2022 and was detected with the Transit method.
Published measurements list a radius of 3.11 Earth radii, a mass of 5.8 Earth masses, an orbital period of 84.29 days, and an equilibrium temperature near 561 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