Hiisi
HAT-P-38 b
IAU name «Hiisi» — Finland, 2019 contest
📋 A written introduction is coming — for now this page shows official values only.
Planet
- Host star
- HAT-P-38
- Distance from Earth
- 255.206 pc (≈ 832.4 light-years)
- NASA planet type
- Gas Giant
- Radius (Earth = 1)
- 9.247
- Mass (Earth = 1)
- 84.857
- Orbital period
- 4.6404 days
- Semi-major axis
- 0.0523 AU
- Eccentricity
- 0.067
- Equilibrium temperature
- 1,082 K
- Discovery method
- Transit
- Discovery year
- 2,012
- Discovery facility
- HATNet
- Host spectral type
- G5
- Host temperature
- 5,330 K
- Host radius (Sun = 1)
- 0.923
- Host mass (Sun = 1)
- 0.886
- Host brightness
- 12.525 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 ↗
Related
Host star
In everyday life
- Light from this object takes about 832 years to reach Earth — the light you see tonight left around AD 1194 (official distance ÷ speed of light).
- Its radius is about 9.2 times Earth's (NASA Exoplanet Archive).
- One orbit takes about 4.6 Earth days — that is this planet's year.
Worked out from this object's official values.