sentences:  Salacia was previously believed to have a mass of around , in which case it would also have had the lowest density (around ) of any known large TNO; William Grundy and colleagues proposed that this low density would imply that Salacia never collapsed into a solid body, in which case it would not be in hydrostatic equilibrium.Salacia's infrared spectrum is almost featureless, indicating an abundance of water ice of less than 5% on the surface.Its light-curve amplitude is only 3%.