Ryugu, provisional designation 1999 JU3, is a near-Earth object and a potentially hazardous asteroid of the Apollo group. It measures approximately 1 kilometre (0.62 mi) in diameter and is a dark object of the rare spectral type Cb,[12] with qualities of both a C-type asteroid and a B-type asteroid. In June 2018, the Japanese spacecraft Hayabusa2 arrived at the asteroid.[13] After making measurements and taking samples, Hayabusa2 left Ryugu for Earth in November 2019[14][15] and returned the sample capsule to Earth on 5 December 2020.