HD 28109 d
A confirmed exoplanet orbiting HD 28109.
Compared with Earth
- Size
- About 3.1 times Earth's width.
- Mass
- About 5.8 times Earth's mass.
- Temperature
- About 288 °C (550 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 84 Earth days.
Planet
- Radius
- 3.11 × Earth
- Mass
- 5.8 × Earth
- Density
- 1.1 g/cm³
- Equilibrium temperature
- 561 K
- Starlight received
- Unknown
- Orbital period
- 84.29 days
- Average distance from its star
- Unknown
Star
- Host star
- HD 28109
- Spectral class
- F — yellow-white
- Surface temperature
- 6,189 K
- Radius
- 1.425 × Sun
- Mass
- 1.227 × Sun
- Age
- 3.2 billion years
System
- Distance from Earth
- 455.3 light-years (139.6 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2022
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.