|Discovery date||August 21, 2006|
|MPC designation||2006 QH181|
|Minor planet category||Trans-Neptunian object
|Epoch 2454311.5 (30 July 2007)|
|Aphelion||97.8 AU (Q)|
|Perihelion||37.3 AU (q)|
|Semi-major axis||67.6 AU (a)|
|Orbital period||555 a|
|Mean anomaly||95° (M)|
|Longitude of ascending node||73.76° (Ω)|
|Argument of perihelion||212° (ω)|
765 km (assumed)
|Absolute magnitude (H)||3.8|
2006 QH181, also written as 2006 QH181, is a trans-Neptunian object. It is very likely a dwarf planet. It is part of the scattered disc. It may be a detached object since a perihelion of 37.6 AU may place it outside of the direct influence of Neptune, or it could have a 3:10 or 1:5 resonance with Neptune. Further observations of the orbit will be required.
It came to perihelion around 1858. It is currently 82.7 AU from the Sun. The only dwarf planets and likely dwarf planets currently further from the Sun are Eris (96.6AU), Sedna (87.0AU), and 2007 OR10 (86.5AU). Because it is so far from the Sun, it only has an apparent magnitude of 23.
It has been observed 10 times over only 2 oppositions and thus currently has a poorly known orbit. JPL ranks orbital quality from 0 to 9 (0 being best), and 2006 QH181 is currently listed with an orbit quality of 8. If the quality of the known orbit were any worse, the uncertainty parameter U would be listed as E for "eccentricity was assumed".
- "MPEC 2008-O05 : Distant Minor Planets". Minor Planet Center & Tamkin Foundation Computer Network. 2008-07-17. Retrieved 2008-07-29.
- "List Of Centaurs and Scattered-Disk Objects". MPC. Retrieved 2007-03-03.
- Marc W. Buie (2008-03-05). "Orbit Fit and Astrometric record for 06QH181". SwRI (Space Science Department). Retrieved 2008-07-29.
- "JPL Small-Body Database Browser: (2006 QH181)". 2008-03-05 last obs. Retrieved 2008-07-23.
- "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 1 September 2008. Retrieved 2008-07-29.
- Wm. Robert Johnston. "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 18 February 2007. Retrieved 2007-03-03.
- "AstDys 2006QH181 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2009-03-16.
- Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2012-01-31.
- "Horizon Online Ephemeris System". California Institute of Technology, Jet Propulsion Laboratory. Retrieved 2009-01-22.
- "AstDys (136199) Eris Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-01-31.
- "AstDys (90377) Sedna Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-01-31.
- "AstDys 2007OR10 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-01-31.