2_20200.txt  c_ck17f010.txt  C/2017 F1       Lemmon                                                                                               C/2017 F1       CK17F010     C/2017 F1 (Lemmon)                        2017 11 30.9568 4.499585   1.004798 64.8196    158.7555   146.4814   2018 09 28      10.5  2000.0 4.0