HD 180617 b
📋 A written introduction is coming — for now this page shows official values only.
Planet
- Host star
- HD 180617
- Distance from Earth
- 5.9106 pc (≈ 19.3 light-years)
- NASA planet type
- Neptune-like
- Radius (Earth = 1)
- 3.53
- Mass (Earth = 1)
- 12.214
- Orbital period
- 105.911 days
- Semi-major axis
- 0.343 AU
- Eccentricity
- 0.101
- Equilibrium temperature
- 201.8 K
- Discovery method
- Radial Velocity
- Discovery year
- 2,018
- Discovery facility
- Calar Alto Observatory
- Host spectral type
- M2.5 V
- Host temperature
- 3,534 K
- Host radius (Sun = 1)
- 0.481
- Host mass (Sun = 1)
- 0.484
- Host brightness
- 9.12 mag
Source:NASA Exoplanet Archive (Caltech/IPAC) · checked 2026-11-02 ↗NASA Science · checked 2026-11-02 ↗NASA Exoplanet Archive (Caltech/IPAC) · checked 2026-11-02 ↗
In everyday life
- Light from this object takes about 19 years to reach Earth — the light you see tonight left around AD 2007 (official distance ÷ speed of light).
- Its radius is about 3.5 times Earth's (NASA Exoplanet Archive).
- One orbit takes about 105.9 Earth days — that is this planet's year.
Worked out from this object's official values.