HN Lib b
📋 A written introduction is coming — for now this page shows official values only.
Planet
- Host star
- HN Lib
- Distance from Earth
- 6.2444 pc (≈ 20.4 light-years)
- NASA planet type
- Neptune-like
- Radius (Earth = 1)
- 2.2
- Mass (Earth = 1)
- 5.46
- Orbital period
- 36.116 days
- Semi-major axis
- 0.1417 AU
- Eccentricity
- 0.079
- Equilibrium temperature
- 234.4 K
- Discovery method
- Radial Velocity
- Discovery year
- 2,023
- Discovery facility
- Calar Alto Observatory
- Host spectral type
- M4.0 V
- Host temperature
- 3,347 K
- Host radius (Sun = 1)
- 0.299
- Host mass (Sun = 1)
- 0.291
- Host brightness
- 11.311 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 20 years to reach Earth — the light you see tonight left around AD 2006 (official distance ÷ speed of light).
- Its radius is about 2.2 times Earth's (NASA Exoplanet Archive).
- One orbit takes about 36.1 Earth days — that is this planet's year.
Worked out from this object's official values.