parent parent_name family_id family_name c_param author ref method 45765 2000 LJ3 -1 2000LJ3 -1.0000 Nesvorny 2025arXiv250800753N/ HCM-2025 1272 Gefion 0 Gefion nan Novakovic 2019EPSC...13.1671N HCM 1272 Gefion 516 Gefion 0.2900 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14