C/1999 T1 (McNaught-Hartley) Epoch 2000 Dec. 2.0 TT = JDT 2451880.5 T 2000 Dec. 13.4703 TT Marsden q 1.171704 (2000.0) P Q z +0.000021 Peri. 344.7572 -0.9658973 -0.2553886 +/-0.000005 Node 182.4823 +0.1065947 -0.5423231 e 0.999975 Incl. 79.9749 -0.2359660 +0.8004138 From 189 observations 1999 Oct. 7-2000 Nov. 2, mean residual 0".7.Elements are also available for the current standard epoch:
C/1999 T1 (McNaught-Hartley) Epoch 2001 Apr. 1.0 TT = JDT 2452000.5 T 2000 Dec. 13.4704 TT Marsden q 1.171717 (2000.0) P Q z +0.000023 Peri. 344.7581 -0.9659017 -0.2553747 +/-0.000005 Node 182.4815 +0.1066043 -0.5423395 e 0.999973 Incl. 79.9736 -0.2359438 +0.8004071An explanation of the orbital elements is available.
These orbital elements are also available in forms suitable for loading into a number of popular planetarium-type software programs.
Check out recent magnitude estimates for this comet.
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2 2001 01 01 14 56.41 -12 47.3 1.457 1.208 55.3 42.0 6.6 2001 01 06 15 10.37 -09 04.2 1.415 1.229 58.4 42.9 6.6 2001 01 11 15 24.34 -05 03.2 1.377 1.255 61.6 43.6 6.7 2001 01 16 15 38.33 -00 44.8 1.344 1.285 64.9 43.9 6.7 2001 01 21 15 52.32 +03 49.4 1.317 1.319 68.2 43.8 6.8 2001 01 26 16 06.28 +08 36.7 1.298 1.356 71.4 43.5 6.9 2001 01 31 16 20.17 +13 33.3 1.288 1.396 74.4 42.8 7.0 2001 02 05 16 33.95 +18 34.3 1.288 1.438 77.2 42.0 7.1 2001 02 10 16 47.58 +23 34.7 1.297 1.483 79.8 40.9 7.3 2001 02 15 17 00.99 +28 29.2 1.315 1.530 81.9 39.7 7.4 2001 02 20 17 14.13 +33 13.5 1.343 1.578 83.7 38.5 7.6 2001 02 25 17 26.91 +37 43.8 1.380 1.628 85.1 37.3 7.8 2001 03 02 17 39.24 +41 57.7 1.424 1.679 86.1 36.1 8.0 2001 03 07 17 51.05 +45 53.7 1.475 1.731 86.8 34.9 8.2 2001 03 12 18 02.25 +49 31.5 1.532 1.784 87.1 33.8 8.4 2001 03 17 18 12.76 +52 51.3 1.594 1.838 87.2 32.7 8.7 2001 03 22 18 22.45 +55 54.1 1.659 1.892 87.1 31.7 8.9 2001 03 27 18 31.21 +58 41.0 1.728 1.947 86.8 30.8 9.1 2001 04 01 18 38.92 +61 13.1 1.799 2.002 86.4 29.9 9.3 2001 04 06 18 45.44 +63 31.6 1.871 2.058 85.9 29.0 9.5 2001 04 11 18 50.63 +65 37.5 1.944 2.113 85.3 28.2 9.7 2001 04 16 18 54.34 +67 31.9 2.018 2.169 84.7 27.4 9.9 2001 04 21 18 56.37 +69 15.6 2.092 2.225 84.1 26.7 10.1 2001 04 26 18 56.5 +70 49.0 2.165 2.281 83.5 26.0 10.3 2001 05 01 18 54.7 +72 12.3 2.238 2.338 82.9 25.3 10.4 2001 05 06 18 50.6 +73 25.5 2.310 2.394 82.3 24.7 10.6 2001 05 11 18 44.2 +74 28.6 2.380 2.450 81.8 24.1 10.8 2001 05 16 18 35.6 +75 21.2 2.450 2.506 81.4 23.5 10.9 2001 05 21 18 24.7 +76 02.8 2.518 2.562 81.0 23.0 11.1 2001 05 26 18 12.0 +76 33.0 2.584 2.618 80.7 22.4 11.2 2001 05 31 17 58.0 +76 51.4 2.649 2.674 80.4 22.0 11.4 2001 06 05 17 43.4 +76 58.0 2.712 2.730 80.2 21.5 11.5 2001 06 10 17 28.9 +76 53.3 2.774 2.785 80.1 21.0 11.7 2001 06 15 17 15.3 +76 37.8 2.834 2.840 80.0 20.6 11.8 2001 06 20 17 02.9 +76 12.5 2.893 2.896 80.0 20.2 11.9 2001 06 25 16 52.3 +75 38.5 2.950 2.951 80.1 19.8 12.0 2001 06 30 16 43.6 +74 57.0 3.006 3.006 80.2 19.5 12.2 2001 07 05 16 36.8 +74 09.3 3.061 3.060 80.4 19.1 12.3 2001 07 10 16 31.9 +73 16.3 3.114 3.115 80.6 18.8 12.4 2001 07 15 16 28.5 +72 19.0 3.167 3.169 80.9 18.5 12.5 2001 07 20 16 26.7 +71 18.1 3.218 3.223 81.2 18.2 12.6 2001 07 25 16 26.1 +70 14.3 3.269 3.277 81.5 17.9 12.7 2001 07 30 16 26.74 +69 08.2 3.320 3.331 81.8 17.6 12.8 2001 08 04 16 28.35 +68 00.5 3.370 3.385 82.2 17.3 12.9 2001 08 09 16 30.80 +66 51.4 3.420 3.438 82.5 17.0 13.0 2001 08 14 16 33.99 +65 41.3 3.470 3.491 82.8 16.7 13.1 2001 08 19 16 37.81 +64 30.7 3.519 3.544 83.1 16.5 13.2 2001 08 24 16 42.19 +63 19.7 3.570 3.597 83.4 16.2 13.3 2001 08 29 16 47.05 +62 08.9 3.620 3.649 83.7 16.0 13.4 2001 09 03 16 52.32 +60 58.4 3.671 3.702 83.8 15.7 13.5 2001 09 08 16 57.93 +59 48.6 3.723 3.754 84.0 15.5 13.6 2001 09 13 17 03.85 +58 39.6 3.776 3.806 84.1 15.2 13.7 2001 09 18 17 10.04 +57 31.7 3.830 3.858 84.1 15.0 13.8 2001 09 23 17 16.46 +56 25.1 3.885 3.909 84.0 14.8 13.9 2001 09 28 17 23.08 +55 20.2 3.940 3.961 83.9 14.6 14.0 2001 10 03 17 29.85 +54 17.2 3.998 4.012 83.6 14.4 14.0 2001 10 08 17 36.77 +53 16.1 4.056 4.063 83.3 14.1 14.1 2001 10 13 17 43.81 +52 17.3 4.116 4.114 82.9 13.9 14.2 2001 10 18 17 50.94 +51 20.8 4.177 4.164 82.4 13.7 14.3 2001 10 23 17 58.15 +50 27.0 4.239 4.215 81.9 13.5 14.4 2001 10 28 18 05.43 +49 35.9 4.302 4.265 81.2 13.3 14.5 2001 11 02 18 12.74 +48 47.7 4.367 4.315 80.5 13.1 14.6 2001 11 07 18 20.08 +48 02.5 4.433 4.365 79.6 12.9 14.6 2001 11 12 18 27.43 +47 20.4 4.500 4.414 78.7 12.7 14.7 2001 11 17 18 34.78 +46 41.5 4.567 4.464 77.8 12.5 14.8 2001 11 22 18 42.13 +46 05.9 4.636 4.513 76.8 12.3 14.9 2001 11 27 18 49.44 +45 33.6 4.705 4.563 75.7 12.1 15.0 2001 12 02 18 56.72 +45 04.7 4.774 4.612 74.6 11.9 15.0 2001 12 07 19 03.95 +44 39.2 4.844 4.660 73.4 11.7 15.1 2001 12 12 19 11.12 +44 17.0 4.914 4.709 72.3 11.5 15.2 2001 12 17 19 18.22 +43 58.3 4.984 4.757 71.1 11.3 15.3 2001 12 22 19 25.25 +43 42.9 5.054 4.806 69.9 11.1 15.3 2001 12 27 19 32.18 +43 30.8 5.124 4.854 68.7 10.9 15.4 2002 01 01 19 39.02 +43 22.0 5.193 4.902 67.5 10.7 15.5 2002 01 06 19 45.74 +43 16.4 5.261 4.950 66.4 10.5 15.6 2002 01 11 19 52.36 +43 13.9 5.328 4.997 65.3 10.3 15.6 2002 01 16 19 58.85 +43 14.4 5.393 5.045 64.3 10.1 15.7 2002 01 21 20 05.21 +43 17.9 5.458 5.092 63.3 9.9 15.8 2002 01 26 20 11.42 +43 24.3 5.521 5.140 62.4 9.8 15.8 2002 01 31 20 17.48 +43 33.4 5.582 5.187 61.6 9.6 15.9 2002 02 05 20 23.39 +43 45.2 5.642 5.234 60.9 9.5 15.9