An gano samfurori na canzawar ruwa a samansa, wanda zai iya nuna kasancewar ruwan kankara a baya wanda ya yi zafi sosai don narkewa. Halin da ke cikin farfajiyar yau zai nuna cewa Hygiea bai narke ba a farkon lokacin samar da hasken rana, sabanin sauran manyan taurari kamar 4 Vesta. Hygiea shine babban memba na dangin Hygiea kuma yana dauke da kusan dukkanin taro (fiye da 90%) a cikin wannan dangin.
bayan Kirkwood rata