2_20200.txt c_ck17s020.txt C/2017 S2 PANSTARRS C/2017 S2 CK17S020 C/2017 S2 (PANSTARRS) 2017 08 29.2828 3.614355 0.823208 305.9609 62.4277 12.6834 2018 03 01 13.0 2000.0 4.0