|MPC designation||2003 QX113|
|Minor planet category||Detached object|
|Epoch June 18, 2009 (2455000.5)|
|Aphelion||62.257 AU (Q)|
|Perihelion||37.486 AU (q)|
|Semi-major axis||49.871 AU (a)|
|Orbital period||352.20 yr|
|Mean anomaly||128.89° (M)|
|Longitude of ascending node||158.09°|
|Argument of perihelion||26.273°|
|Dimensions||505 km (assumed)|
|Absolute magnitude (H)||4.7|
It is currently 59 AU from the Sun, and will come to aphelion around 2058. It last came to perihelion around 1883. This makes it currently one of the most distant known large bodies (59AU) in the solar system after Eris (96.7AU), Sedna (88AU), 2007 OR10 (86AU), and 2006 QH181 (82AU).
When 2003 QX113 was first discovered it was estimated to have an absolute magnitude (H) of 4.9 giving it an assumed size of only 461 km in diameter. As of 2010, 2003 QX113 is estimated to have a brighter absolute magnitude (H) of 4.7. Assuming it is a trans-Neptunian object with a generic albedo of 0.09, it is about 505 km in diameter.
- Marsden, Brian G. (2006-04-22). "MPEC 2006-H29 : 45 NEW MULTIPLE-OPPOSITION TNOs". IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. Retrieved 2010-01-06.
- Marc W. Buie (2008-05-05 using 23 of 23 observations). "Orbit Fit and Astrometric record for 03QX113". SwRI (Space Science Department). Retrieved 2009-03-23.
- "JPL Small-Body Database Browser: (2003 QX113)". 2008-05-05 last obs. Retrieved 2009-03-23.
- Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 2009-04-18. Retrieved 2009-03-23.
- "AstDys 2003QX113 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-05-14. Retrieved 2009-03-23.
- "Horizon Online Ephemeris System". California Institute of Technology, Jet Propulsion Laboratory. Retrieved 2009-03-23.
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- What is the most distant body in the Solar System? A historical view (Michael Richmond)