HD 28109 c
Orbiting HD 28109
HD 28109 c is an exoplanet orbiting the star HD 28109, discovered in 2022 using the Transit method. It is a Neptune-sized world.
Radius
4.13
Earth radii
Mass
9.20
Earth masses
Orbital Period
56.0
days
Distance
139.6
parsecs
Equilibrium Temp
643
K
Radius (Earth radii)
4.13
Mass (Earth masses)
9.20
Measured
Equilibrium Temperature
643 K
Parameter source: Barone et al. 2025
Orbital Period
55.997+0.000−0.000days
Planet Mass (Earth masses)
9.20+2.00−2.00
Planet Mass (Jupiter masses)
0.0289+0.0063−0.0063
Eccentricity
0.0039+0.0041−0.0037
Argument of Periastron
39.0+73.0−6.0deg
Radial Velocity Semi-Amplitude
1.35+0.28−0.28m/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 c
HD 28109 c orbits HD 28109 and was reported in 2022 and was detected with the Transit method.
Published measurements list a radius of 4.13 Earth radii, a mass of 9.2 Earth masses, an orbital period of 56 days, and an equilibrium temperature near 643 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