2_20701.txt c_ck19y040.txt C/2019 Y4 ATLAS C/2019 Y4 CK19Y040 C/2019 Y4 (ATLAS) 2020 05 30.9428 0.254752 0.999283 177.4540 120.6386 45.2600 2023 01 28 11.8 2000.0 6.0