parent parent_name family_id family_name c_param author ref method 1599 Giomus -1 Giomus -1.0000 Nesvorny 2024ApJS..274...25N HCM-2024 10 Hygiea 0 Hygiea nan Novakovic 2019EPSC...13.1671N HCM 10 Hygiea 601 Hygiea nan Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14