2_20200.txt c_ck17k010.txt C/2017 K1 PANSTARRS C/2017 K1 CK17K010 C/2017 K1 (PANSTARRS) 2018 03 17.7630 7.289463 1.002790 4.4242 225.6814 154.0169 2021 05 27 7.0 2000.0 4.0