18 Delphini b
Astronomical discovery
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18 Delphini b, formally named Arion, is an extrasolar planet approximately 249 light-years away in the constellation of Delphinus.
The 993-day period planet orbits the yellow giant star 18 Delphini. A very massive and dense planet with a minimum... Wikipedia
Discovered: February 19, 2008
Discovered by: Sato et al.
Orbits: 18 Delphini
Distance from sun: about 245.6 light-years
Orbital period (sidereal): 993.3 ± 3.2 d; 2.719 y
Semi-major axis: 2.6 AU (390,000,000 km)