(181902) 1999 RD215

(181902) 1999 RD₂₁₅
Discovery
Discovered by	C. Trujillo J. X. Luu D. C. Jewitt
Discovery site	Mauna Kea Obs.
Discovery date	6 September 1999
Designations
MPC designation	(181902) 1999 RD₂₁₅
Alternative designations	1999 RD₂₁₅
Minor planet category	TNO · SDO · distant
Orbital characteristics
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3 · 1
Observation arc	8.03 yr (2,933 days)
Aphelion	204.40 AU
Perihelion	37.541 AU
Semi-major axis	120.97 AU
Eccentricity	0.6897
Orbital period (sidereal)	1330.58 yr (485,993 d)
Mean anomaly	7.8003°
Mean motion	0° 0^m 2.52^s / day
Inclination	25.990°
Longitude of ascending node	210.32°
Argument of perihelion	137.86°
Physical characteristics
Mean diameter	147 km 148 km
Geometric albedo	0.08 (estimate) 0.09 (estimate)
Absolute magnitude (H)	7.4 · 7.6

(181902) 1999 RD₂₁₅ is a trans-Neptunian object of the scattered disc, approximately 148 kilometers in diameter. It was discovered on 6 September 1999, by American astronomers Chad Trujillo, Jane Luu, and David Jewitt at the Mauna Kea Observatories, Hawaii.