2_20200.txt c_ck17a010.txt C/2017 A1 PANSTARRS C/2017 A1 CK17A010 C/2017 A1 (PANSTARRS) 2017 05 17.1517 2.290594 0.971429 2.0639 121.0608 49.7920 2018 03 01 13.0 2000.0 4.0