C/2017 S7 Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 T 2017 May 27.8608 TT MPEC 2017-T38 q 7.614128 (2000.0) P Q z -0.000286 Peri. 187.7455 +0.1996035 +0.5359564 +/-0.000020 Node 262.7875 +0.9375140 +0.1390350 e 1.002179 Incl. 124.2232 +0.2850016 -0.8327184 From 63 observations 2016 Dec. 18-2017 Oct. 7, mean residual 0".4. C/2017 S7 (Lemmon) Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag. 2017 09 04 05 28.94 +11 37.5 7.760 7.639 79.4 7.5 19.3 2017 09 09 05 28.63 +11 13.2 7.676 7.642 84.3 7.5 19.3 2017 09 14 05 28.09 +10 48.0 7.592 7.644 89.2 7.6 19.2 2017 09 19 05 27.32 +10 22.2 7.509 7.647 94.1 7.5 19.2 2017 09 24 05 26.30 +09 55.6 7.426 7.650 99.2 7.4 19.2 2017 09 29 05 25.03 +09 28.3 7.345 7.653 104.3 7.3 19.2 2017 10 04 05 23.51 +09 00.4 7.266 7.657 109.4 7.1 19.1 2017 10 09 05 21.74 +08 31.9 7.191 7.660 114.6 6.8 19.1 2017 10 14 05 19.72 +08 03.0 7.119 7.663 119.8 6.5 19.1 2017 10 19 05 17.46 +07 33.7 7.052 7.667 125.0 6.1 19.1 2017 10 24 05 14.95 +07 04.2 6.991 7.671 130.2 5.7 19.1 2017 10 29 05 12.23 +06 34.6 6.936 7.675 135.4 5.2 19.1 2017 11 03 05 09.29 +06 05.1 6.887 7.679 140.5 4.7 19.0 2017 11 08 05 06.17 +05 35.8 6.846 7.683 145.5 4.2 19.0 2017 11 13 05 02.89 +05 06.8 6.813 7.687 150.1 3.7 19.0 2017 11 18 04 59.47 +04 38.5 6.788 7.691 154.4 3.2 19.0 2017 11 23 04 55.94 +04 10.8 6.771 7.696 157.9 2.8 19.0 2017 11 28 04 52.34 +03 44.1 6.764 7.700 160.3 2.5 19.0 2017 12 03 04 48.71 +03 18.5 6.766 7.705 161.0 2.4 19.0 2017 12 08 04 45.07 +02 54.1 6.777 7.710 160.0 2.5 19.0 2017 12 13 04 41.47 +02 31.1 6.797 7.715 157.3 2.8 19.0 2017 12 18 04 37.93 +02 09.6 6.826 7.720 153.6 3.2 19.0 2017 12 23 04 34.49 +01 49.6 6.863 7.725 149.3 3.7 19.1 2017 12 28 04 31.18 +01 31.3 6.909 7.730 144.5 4.2 19.1 2018 01 02 04 28.04 +01 14.6 6.962 7.736 139.5 4.7 19.1 2018 01 07 04 25.08 +00 59.6 7.022 7.741 134.3 5.2 19.1 2018 01 12 04 22.32 +00 46.1 7.089 7.747 129.1 5.7 19.1 2018 01 17 04 19.78 +00 34.3 7.161 7.753 123.9 6.0 19.2 2018 01 22 04 17.48 +00 24.0 7.238 7.759 118.6 6.4 19.2 2018 01 27 04 15.42 +00 15.1 7.320 7.765 113.4 6.7 19.2 2018 02 01 04 13.61 +00 07.5 7.405 7.771 108.3 6.9 19.3 2018 02 06 04 12.06 +00 01.1 7.493 7.777 103.2 7.1 19.3 2018 02 11 04 10.75 -00 04.2 7.583 7.783 98.1 7.2 19.3 2018 02 16 04 09.69 -00 08.5 7.674 7.790 93.1 7.3 19.3 2018 02 21 04 08.87 -00 12.0 7.765 7.796 88.2 7.3 19.4 2018 02 26 04 08.29 -00 14.8 7.856 7.803 83.3 7.2 19.4 2018 03 03 04 07.94 -00 17.1 7.946 7.810 78.5 7.1 19.4 2018 03 08 04 07.80 -00 18.9 8.035 7.817 73.8 7.0 19.5 2018 03 13 04 07.86 -00 20.4 8.121 7.824 69.2 6.8 19.5 2018 03 18 04 08.12 -00 21.7 8.205 7.831 64.7 6.6 19.5 2018 03 23 04 08.56 -00 22.9 8.285 7.839 60.3 6.3 19.5 H = 6.0, 2.5n = 10.0