 The first new asteroid that was designated in 1852 using this new scheme was 16 Psyche, when American astronomer James Ferguson published his observations.Psyche is massive enough that its gravitational perturbations on other asteroids can be observed, which enables a mass measurement.The values for the mass of and the density of obtained from a 2002 analysis by Kuzmanoski and Kovačević, of a close encounter with asteroid .