C/2017 S2 Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 T 2017 Aug. 28.6017 TT MPC 106347 q 3.613979 (2000.0) P Q n 0.0106235 Peri. 305.8099 +0.9721009 -0.1309582 a 20.493927 Node 62.4468 +0.2109571 +0.8508312 e 0.823656 Incl. 12.6794 -0.1025518 +0.5088578 P 92.8 From 43 observations 2017 Aug. 22-Sept. 29, mean residual 0".4. C/2017 S2 (PANSTARRS) Elements MPC 106347 Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag. 2017 09 04 01 35.22 -04 10.4 2.791 3.614 139.2 10.5 19.8 2017 09 09 01 34.47 -04 15.8 2.753 3.615 143.9 9.5 19.8 2017 09 14 01 33.35 -04 21.6 2.720 3.616 148.6 8.3 19.8 2017 09 19 01 31.88 -04 27.6 2.693 3.618 153.3 7.2 19.7 2017 09 24 01 30.10 -04 33.3 2.672 3.620 157.8 6.0 19.7 2017 09 29 01 28.08 -04 38.2 2.657 3.623 161.9 4.9 19.7 2017 10 04 01 25.85 -04 42.1 2.650 3.626 165.4 4.0 19.7 2017 10 09 01 23.50 -04 44.5 2.649 3.630 167.3 3.5 19.7 2017 10 14 01 21.08 -04 45.1 2.655 3.634 167.1 3.5 19.7 2017 10 19 01 18.66 -04 43.6 2.668 3.639 164.9 4.1 19.7 2017 10 24 01 16.31 -04 39.8 2.688 3.643 161.2 5.0 19.8 2017 10 29 01 14.10 -04 33.3 2.714 3.649 156.9 6.1 19.8 2017 11 03 01 12.10 -04 24.2 2.748 3.655 152.2 7.3 19.8 2017 11 08 01 10.35 -04 12.4 2.787 3.661 147.4 8.4 19.9 2017 11 13 01 08.90 -03 57.8 2.833 3.668 142.5 9.5 19.9 2017 11 18 01 07.78 -03 40.4 2.884 3.675 137.6 10.4 20.0 2017 11 23 01 07.03 -03 20.5 2.940 3.683 132.7 11.4 20.0 2017 11 28 01 06.67 -02 58.0 3.002 3.691 127.9 12.2 20.1 2017 12 03 01 06.70 -02 33.1 3.067 3.699 123.2 12.9 20.1 2017 12 08 01 07.14 -02 06.1 3.136 3.708 118.5 13.5 20.2 2017 12 13 01 07.97 -01 37.0 3.209 3.718 113.9 14.0 20.2 2017 12 18 01 09.19 -01 06.0 3.284 3.727 109.3 14.4 20.3 2017 12 23 01 10.79 -00 33.4 3.362 3.737 104.9 14.7 20.4 2017 12 28 01 12.76 +00 00.8 3.442 3.748 100.5 15.0 20.4 2018 01 02 01 15.07 +00 36.2 3.523 3.759 96.2 15.1 20.5 2018 01 07 01 17.72 +01 12.9 3.606 3.770 92.0 15.1 20.5 2018 01 12 01 20.68 +01 50.5 3.689 3.782 87.9 15.1 20.6 2018 01 17 01 23.94 +02 29.0 3.772 3.794 83.8 14.9 20.7 2018 01 22 01 27.47 +03 08.2 3.856 3.807 79.8 14.7 20.7 2018 01 27 01 31.26 +03 48.1 3.939 3.820 75.8 14.5 20.8 2018 02 01 01 35.29 +04 28.3 4.022 3.833 72.0 14.1 20.9 2018 02 06 01 39.54 +05 08.9 4.103 3.846 68.1 13.8 20.9 2018 02 11 01 43.99 +05 49.6 4.183 3.860 64.4 13.3 21.0 2018 02 16 01 48.64 +06 30.5 4.262 3.875 60.6 12.8 21.0 2018 02 21 01 53.46 +07 11.4 4.339 3.889 57.0 12.3 21.1 2018 02 26 01 58.44 +07 52.1 4.414 3.904 53.3 11.7 21.1 2018 03 03 02 03.56 +08 32.6 4.487 3.920 49.7 11.1 21.2 2018 03 08 02 08.81 +09 12.9 4.557 3.935 46.2 10.5 21.2 2018 03 13 02 14.19 +09 52.7 4.624 3.951 42.7 9.8 21.3 2018 03 18 02 19.67 +10 32.2 4.689 3.968 39.2 9.1 21.3 2018 03 23 02 25.26 +11 11.1 4.751 3.984 35.7 8.4 21.4 H = 12.0, 2.5n = 10.0