軌道要素 T = 2006 Oct. 9.226 TT Peri. = 181.745 Node = 284.416 2000.0 q = 1.07182 AU Incl. = 19.117
2015年9月28日付小惑星回報（The Minor Planet Circulars）より(162173) Ryugu = 1999 JU3Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.Ryugu is the undersea palace of the Dragon God. In a Japanese legend, a fisherman was rewarded with a visit to Ryugu and brought back a box with a secret. The spaceprobe Hayabusa 2 will visit this asteroid and bring back a capsule containing surface samples.