(418993) 2009 MS9, provisionally known as 2009 MS9, is a centaur roughly 30–60 km in diameter.
It has a highly inclined orbit and a barycentric semi-major axis (average distance from the Sun) of ~353 AU.
[a] 2009 MS9 has a well determined orbit and has been assigned a minor planet number.
[2] It came to perihelion in February 2013 at a distance of 11 AU from the Sun (outside the orbit of Saturn).
After leaving the planetary region of the Solar System, 2009 MS9 will have a barycentric aphelion of 696 AU with an orbital period of 6640 years.