Arion
18 Del b
IAU name «Arion» — Japan, 2015 contest
📋 A written introduction is coming — for now this page shows official values only.
Planet
- Host star
- 18 Del
- Distance from Earth
- 76.222 pc (≈ 248.6 light-years)
- NASA planet type
- Gas Giant
- Radius (Earth = 1)
- 12.5
- Mass (Earth = 1)
- 2,926.2461
- Orbital period
- 982.85 days
- Semi-major axis
- 2.476 AU
- Eccentricity
- 0.024
- Equilibrium temperature
- 452.72 K
- Discovery method
- Radial Velocity
- Discovery year
- 2,008
- Discovery facility
- Okayama Astrophysical Observatory
- Host spectral type
- G6 III
- Host temperature
- 4,980 K
- Host radius (Sun = 1)
- 8.8
- Host mass (Sun = 1)
- 2.1
- Host brightness
- 5.5105 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 249 years to reach Earth — the light you see tonight left around AD 1777 (official distance ÷ speed of light).
- Its radius is about 13 times Earth's (NASA Exoplanet Archive).
- One orbit takes about 982.9 Earth days (about 2.7 years) — that is this planet's year.
Worked out from this object's official values.