The HD 80653 System
HD 80653 is a planetary system in the constellation Cancer hosting 2 confirmed exoplanets, about 358 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.
Size Comparison: The Planets of HD 80653
Planets without a measured radius are not shown.
HD 80653: Star and Habitable Zone
HD 80653
- Surface temperature
- 5,959 K (Sun: 5,772 K)
- Mass
- 1.18 M☉
- Radius
- 1.22 R☉
- Age
- 2.7 billion years (Sun: 4.6)
Habitable zone of HD 80653: 0.963–2.259 AU (conservative: 1.220–2.142 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 80653 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| HD 80653 b | Lava World | 0.7 d | 1.61 R⊕ | 0.27 | 2020 |
| K2-312 c HZ | Cold Gas Giant | 921 d | — | 0.39 | 2023 |
Discovery History
The first planet found here, HD 80653 b, was discovered in 2020 using the transit method. The most recent addition, K2-312 c, followed in 2023.
- 2020 — HD 80653 b (Transit)
- 2023 — K2-312 c (Radial Velocity)
Frequently Asked Questions About HD 80653
How many planets does HD 80653 have?
HD 80653 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the HD 80653 system habitable?
One planet in the system orbits within the habitable zone, where liquid water could exist. Actual habitability depends on atmospheres and composition, which are not yet known.
How far away is HD 80653?
HD 80653 is about 358 light-years from Earth in the constellation Cancer.
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