(145452) 2005 RN43 (provisional designation 2005 RN43) is a classical Kuiper belt object.

[6] It was discovered by Andrew Becker, Andrew Puckett and Jeremy Kubica on 10 September 2005 at Apache Point Observatory in Sunspot, New Mexico.

[9][10] The Minor Planet Center (MPC) classifies it as a cubewano.

[3] But since this object has an inclination of 19.3°, the Deep Ecliptic Survey (DES) classifies it as scattered-extended.

[4] It has been observed 119 times over thirteen oppositions, with precovery images back to 1954.