2_20701.txt c_ck21s040.txt C/2021 S4 Tsuchinshan C/2021 S4 CK21S040 C/2021 S4 (Tsuchinshan) 2024 01 01.4016 6.690829 0.959405 72.7859 5.4968 17.4800 2023 01 28 6.5 2000.0 4.0