The HD 5278 System
HD 5278 is a planetary system in the constellation Octans hosting 2 confirmed exoplanets, about 188 light-years from Earth.
Size Comparison: The Planets of HD 5278
Planets without a measured radius are not shown.
HD 5278: Star and Habitable Zone
HD 5278
- Spectral type
- F V
- Surface temperature
- 6,203 K (Sun: 5,772 K)
- Mass
- 1.13 M☉
- Radius
- 1.19 R☉
- Luminosity
- 1.9070 L☉
- Age
- 3.0 billion years (Sun: 4.6)
Habitable zone of HD 5278: 1.010–2.356 AU (conservative: 1.279–2.234 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 2 Planets in the HD 5278 System
Discovery History
The first planet found here, HD 5278 b, was discovered in 2021 using the transit method.
Frequently Asked Questions About HD 5278
How many planets does HD 5278 have?
HD 5278 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the HD 5278 system habitable?
None of the known planets in HD 5278 orbit within the star's habitable zone.
How far away is HD 5278?
HD 5278 is about 188 light-years from Earth in the constellation Octans.
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