2_20701.txt c_ck21y010.txt C/2021 Y1 ATLAS C/2021 Y1 CK21Y010 C/2021 Y1 (ATLAS) 2023 04 30.6998 2.032420 1.000871 245.8142 244.7699 77.1900 2023 01 28 7.0 2000.0 4.0