orbit 88DAYS MEBURY 88 DAYS MERCURY VENUS 225 DAYS EARTH 365 365DAYS DAYS MARS 687 687DAYS DAYS . HOW LONG DOES EACH PLANET TAKE HOLHLOIEAPLANEIt orbits its host star with an orbital period P = 3.37077196 ± 0.00000059 days, semimajor axis a = 0.02604 ± 0.00045 au and an orbital eccentricity of 0.029 ± 0.030.