2_20701.txt c_ck18n020.txt C/2018 N2 ASASSN C/2018 N2 CK18N020 C/2018 N2 (ASASSN) 2019 11 11.3622 3.127779 1.000946 24.4849 25.2037 77.5542 2023 01 28 6.0 2000.0 4.0