Discovery site APO MPC designation (145451) 2005 RM43 Observation arc 14323 days (39.21 yr) | Discovery date 9 September 2005 Minor planet category SDO | |
Discovered by A. C. BeckerA. W. PuckettJ. M. Kubica | ||
(145451) 2005 RM43, also written as (145451) 2005 RM43, is a trans-Neptunian object that resides in the scattered disc region beyond the Kuiper belt. It was discovered on September 9, 2005 by Andrew Becker, Andrew Puckett and Jeremy Kubica at Apache Point Observatory in Sunspot, New Mexico.
(145451) 2005 RM43 is considered likely to be a dwarf planet by both, Brown and Tancredi. Based on an absolute magnitude of 4.4, the body's diameter could be anywhere in the range of 350 to 800 kilometres, depending on its albedo, the surface reflectivity of the object. One source gives an estimate of 580 km.
It has been observed 219 times over eleven oppositions, with precovery images back to 1976. The orbit is well determined with an uncertainty parameter of 2.