(668643) 2012 DR₃₀ is a trans-Neptunian object and centaur from the scattered disk and/or inner Oort cloud, located in the outermost region of the Solar System. The object with a highly eccentric orbit of 0.99 was first observed by astronomers with the Spacewatch program at Steward Observatory on 31 March 2009.^[2] It measures approximately 188 kilometers (120 miles) in diameter.

Using an epoch of February 2017, it has the second-largest heliocentric semi-major axis of a minor planet not detected out-gassing like a comet.^[9] (2014 FE72 has a larger heliocentric semi-major axis.) 2012 DR₃₀ does have a barycentric semi-major axis of 1032 AU.^{[10][lower-alpha 1]} For the epoch of July 2018 2012 DR₃₀ will have its largest heliocentric semi-major axis of 1644 AU.

2012 DR₃₀ passed 5.7 AU from Saturn in February 2009 and came to perihelion in March 2011 at a distance of 14.5 AU from the Sun (inside the orbit of Uranus).^[1] In 2018, it will move from 18.2 AU to 19.1 AU from the Sun.^[8] It comes to opposition in late March. With an absolute magnitude (H) of 7.1,^[2] the object has a published diameter of 185 and 188 kilometers, respectively.^[5][6]

With an observation arc of 14.7 years,^[1] it has a well constrained orbit. It will not be 50 AU from the Sun until 2047. After leaving the planetary region of the Solar System, 2012 DR₃₀ will have a barycentric aphelion of 2049 AU with an orbital period of 33100 years.^{[lower-alpha 1]} In a 10 million year integration of the orbit, the nominal (best-fit) orbit and both 3-sigma clones remain outside 12.2 AU (q_min) from the Sun.^[4] Summary of barycentric orbital parameters are:

• Semi-major axis: ~1032 AU^{[lower-alpha 1]}
• aphelion: ~2049 AU^{[lower-alpha 1]}
• period: ~33,100 yr^{[lower-alpha 1]}

Archived data from the JPL SBDB and MPC.^{[lower-alpha 2][lower-alpha 3]}