HD 5278 b
A confirmed exoplanet orbiting HD 5278.
Compared with Earth
- Size
- About 2.5 times Earth's width.
- Mass
- About 7.8 times Earth's mass.
- Temperature
- About 670 °C (1,238 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 132 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 14 Earth days.
Planet
- Radius
- 2.45 × Earth
- Mass
- 7.8 × Earth
- Density
- 2.9 g/cm³
- Equilibrium temperature
- 943 K
- Starlight received
- 132 × Earth
- Orbital period
- 14.34 days
- Average distance from its star
- 0.1202 AU
Star
- Host star
- HD 5278
- Spectral class
- F — yellow-white
- Surface temperature
- 6,203 K
- Radius
- 1.194 × Sun
- Mass
- 1.126 × Sun
- Age
- 3 billion years
System
- Distance from Earth
- 187.8 light-years (57.58 parsecs)
- Stars in system
- 1
- Known planets
- 2
Discovery
- Year
- 2021
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.