2_20200.txt c_ck18c020.txt C/2018 C2 Lemmon C/2018 C2 CK18C020 C/2018 C2 (Lemmon) 2018 06 02.0732 1.956492 1.001148 134.1106 91.1388 34.4583 2019 12 08 13.0 2000.0 4.0