C/2023 X1 (Leonard) Orbit by S. Nakano unpublished (2024) Observed in 1st half of 2024
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) 2023 Oct. 18.1040 0.950741 0.994581 321.4994 137.0173 110.5907 0.200 m1 = 13.5 + 5 log Delta + 8.0 log r Date/ 0h TT R.A.(1950) Decl. R.A.(2000) Decl. Delta r Daily motion Magnitude Mot./PA Elong. P PA/Tail Moon Age h m ¡ , h m ¡ , m , m1 , ¡ ¡ ¡ ¡ ¡ ¡ 2023 Dec. 22 13 17.50 +43 28.3 13 19.71 +43 12.6 1.025 1.448 +3.57 +91.4 14.8 97.3/ 17 92.2 42.8 301/6.61 125 .74 2024 Jan. 1 13 53.74 +58 41.6 13 55.43 +58 26.9 1.054 1.568 +6.06 +78.3 15.2 86.6/ 19 100.5 38.1 297/5.81 59 .78 11 14 55.82 +71 41.8 14 56.05 +71 29.8 1.157 1.690 +13.13 +51.5 15.6 68.7/ 28 104.0 34.4 298/4.88 108 .01 21 17 11.02 +80 08.0 17 07.35 +80 04.4 1.318 1.814 +21.94 + 9.0 16.2 51.2/ 54 103.0 31.9 317/4.06 75 .79 31 20 49.75 +81 23.3 20 46.79 +81 34.5 1.518 1.938 +13.11 -17.5 16.7 37.3/101 99.2 30.1 359/3.40 97 .77 Feb. 10 22 56.80 +78 23.1 22 57.88 +78 39.2 1.741 2.062 +6.15 -18.1 17.2 27.2/124 94.1 28.5 21/2.85 98 .00 20 23 56.89 +75 21.2 23 59.42 +75 37.9 1.976 2.186 +3.75 -13.6 17.7 20.2/128 88.5 26.9 27/2.40 66 .82 Mar. 1 00 33.77 +73 05.5 00 36.90 +73 22.0 2.213 2.308 +2.78 - 9.2 18.1 15.5/123 82.8 25.2 27/2.04 121 .75 11 01 01.25 +71 34.2 01 04.72 +71 50.2 2.447 2.430 +2.32 - 5.5 18.5 12.4/114 77.3 23.5 25/1.74 74 .01 21 01 24.20 +70 39.2 01 27.94 +70 54.8 2.674 2.550 +2.07 - 2.7 18.9 10.6/102 72.1 21.8 23/1.49 78 .84 31 01 44.70 +70 13.2 01 48.67 +70 28.1 2.891 2.670 +1.93 - 0.4 19.2 9.7/ 90 67.3 20.2 19/1.28 130 .72 Apr. 10 02 03.83 +70 10.4 02 08.01 +70 24.6 3.095 2.788 +1.85 + 1.5 19.5 9.4/ 78 63.1 18.7 15/1.12 55 .02 20 02 22.13 +70 26.5 02 26.55 +70 40.0 3.285 2.905 +1.81 + 3.1 19.8 9.4/ 69 59.4 17.3 10/0.98 95 .86 30 02 39.96 +70 58.2 02 44.64 +71 10.9 3.458 3.021 +1.79 + 4.4 20.0 9.6/ 60 56.5 16.1 4/0.87 121 .66 May 10 02 57.58 +71 43.2 03 02.55 +71 55.0 3.615 3.136 +1.79 + 5.6 20.3 9.8/ 54 54.3 15.2 358/0.79 47 .05 20 03 15.14 +72 39.7 03 20.43 +72 50.6 3.756 3.249 +1.80 + 6.6 20.5 10.1/ 48 53.0 14.4 352/0.72 112 .88 30 03 32.79 +73 46.3 03 38.46 +73 56.2 3.879 3.361 +1.84 + 7.5 20.7 10.5/ 42 52.6 13.9 345/0.67 102 .58 June 9 03 50.69 +75 02.3 03 56.82 +75 11.0 3.986 3.472 +1.89 + 8.3 20.8 10.8/ 37 53.1 13.5 339/0.64 55 .07 19 04 08.98 +76 26.9 04 15.68 +76 34.5 4.077 3.582 +1.97 + 9.1 21.0 11.2/ 33 54.4 13.3 333/0.62 124 .90 29 04 27.93 +77 59.6 04 35.36 +78 05.9 4.153 3.691 +2.10 + 9.9 21.1 11.6/ 29 56.5 13.3 327/0.61 81 .49 July 9 04 47.96 +79 40.3 04 56.39 +79 45.1 4.216 3.799 +2.33 +10.7 21.3 12.1/ 25 59.3 13.3 323/0.60 70 .09 19 05 09.81 +81 28.4 05 19.68 +81 31.7 4.267 3.906 +2.78 +11.3 21.4 12.6/ 22 62.6 13.4 319/0.59 127 .92 29 05 35.30 +83 23.7 05 47.46 +83 25.0 4.309 4.012 +3.86 +11.9 21.5 13.1/ 21 66.4 13.4 317/0.59 65 .40 Aug. 8 06 09.64 +85 25.1 06 26.03 +85 23.8 4.344 4.117 +7.52 +11.9 21.6 13.7/ 22 70.4 13.4 317/0.59 86 .11 18 07 15.72 +87 28.7 07 41.24 +87 22.4 4.374 4.221 +25.63 + 7.3 21.7 14.3/ 32 74.7 13.4 327/0.58 117 .95 28 11 54.07 +88 51.9 11 57.54 +88 35.2 4.402 4.324 +24.63 - 8.4 21.8 14.8/ 88 79.0 13.3 23/0.57 62 .33 Sept. 7 16 21.96 +87 18.7 16 03.82 +87 11.2 4.430 4.426 +7.26 -13.6 21.9 15.4/142 83.2 13.1 76/0.56 100 .13 17 17 26.25 +84 57.8 17 16.41 +84 55.0 4.463 4.527 +3.77 -14.6 22.0 15.8/152 87.2 12.8 85/0.55 100 .98 27 17 59.94 +82 29.0 17 54.06 +82 28.8 4.501 4.627 +2.72 -15.0 22.1 16.2/154 90.9 12.5 85/0.53 71 .28 Oct. 7 18 24.97 +79 57.5 18 21.26 +79 59.1 4.549 4.727 +2.27 -15.0 22.2 16.4/153 94.1 12.2 82/0.51 106 .15 17 18 46.32 +77 26.3 18 43.97 +77 29.5 4.608 4.826 +2.03 -14.7 22.3 16.4/151 96.6 11.8 77/0.49 84 1.00 27 19 05.67 +74 58.0 19 04.24 +75 02.7 4.679 4.924 +1.88 -14.2 22.4 16.2/149 98.4 11.5 72/0.47 87 .25 Nov. 6 19 23.79 +72 35.1 19 23.03 +72 41.1 4.764 5.021 +1.77 -13.4 22.5 15.8/146 99.3 11.2 66/0.45 102 .18 16 19 41.02 +70 20.3 19 40.76 +70 27.4 4.863 5.118 +1.69 -12.4 22.6 15.2/142 99.3 11.0 59/0.43 77 1.00 26 19 57.53 +68 15.6 19 57.65 +68 23.8 4.976 5.213 +1.62 -11.2 22.7 14.5/138 98.5 10.8 53/0.41 101 .24 Dec. 6 20 13.44 +66 22.9 20 13.87 +66 32.1 5.101 5.309 +1.56 - 9.8 22.8 13.8/134 96.8 10.6 46/0.40 88 .23 16 20 28.80 +64 43.7 20 29.47 +64 53.8 5.238 5.403 +1.50 - 8.4 23.0 12.9/129 94.4 10.5 40/0.38 83 .99 26 20 43.61 +63 18.9 20 44.49 +63 29.8 5.383 5.497 +1.45 - 6.9 23.1 12.1/123 91.4 10.3 33/0.37 108 .23 2025 Jan. 5 20 57.91 +62 08.9 20 58.96 +62 20.7 5.536 5.590 +1.39 - 5.4 23.2 11.2/117 88.1 10.1 27/0.35 73 .28 15 21 11.67 +61 14.0 21 12.87 +61 26.4 5.693 5.683 +1.33 - 4.0 23.3 10.4/111 84.4 9.9 20/0.34 96 .99 25 21 24.89 +60 33.8 21 26.22 +60 46.8 5.852 5.774 +1.28 - 2.5 23.4 9.7/104 80.6 9.7 14/0.32 106 .22 Feb. 4 21 37.55 +60 07.7 21 38.98 +60 21.3 6.010 5.866 +1.22 - 1.2 23.5 9.1/ 96 76.9 9.4 7/0.30 64 .35 14 21 49.61 +59 55.1 21 51.14 +60 09.2 6.165 5.957 +1.15 0.0 23.6 8.6/ 89 73.3 9.1 0/0.29 110 .98 24 22 01.04 +59 54.9 22 02.65 +60 09.5 6.315 6.047 +1.08 + 1.2 23.8 8.1/ 81 69.9 8.8 353/0.27 96 .19 Mar. 6 22 11.79 +60 06.3 22 13.47 +60 21.2 6.457 6.136 +1.01 + 2.2 23.9 7.8/ 72 66.9 8.6 346/0.26 68 .42 16 22 21.79 +60 28.2 22 23.54 +60 43.4 6.590 6.225 +0.93 + 3.1 23.9 7.4/ 64 64.4 8.3 338/0.24 120 .97 26 22 30.99 +60 59.4 22 32.79 +61 14.9 6.712 6.314 +0.83 + 4.0 24.0 7.2/ 55 62.5 8.1 330/0.23 81 .16