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Table 1

Orbital elements of P9, as given in Batygin & Brown (2016), in ecliptic (IERS) orbital elements (a,e,i,ω,Ω), respectively semi-major axis, eccentricity, inclination, argument of perihelion, and longitude of the node.

a (AU) e i (deg) ω (deg) Ω (deg)

700 0.6 30 150 113