2_20701.txt c_ck19s040.txt C/2019 S4 Lemmon C/2019 S4 CK19S040 C/2019 S4 (Lemmon) 2020 04 07.9143 3.442294 0.985107 71.3663 63.1588 92.0339 2021 10 18 11.0 2000.0 4.0