123P/West-Hartley Orbit by S. Nakano NK 3780 (2019) Observed in 1st half of 2026
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2026 Sep. 21.92184 2.1586680 0.4448307 7.67 103.88111 45.86342 15.28169 0.200 2026 June 9.0 m1 = 6.0 + 5 log Delta + 21.0 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 , ¡ ¡ ¡ ¡ ¡ ¡ 2025 Dec. 31 03 20.03 +27 06.3 03 23.04 +27 17.0 2.109 2.894 -0.34 + 0.6 17.3 4.6/278 135.5 13.8 84/1.18 5 .84 2026 Jan. 10 03 16.60 +27 12.3 03 19.60 +27 23.1 2.174 2.852 -0.05 + 1.1 17.2 1.3/329 124.8 16.5 81/1.37 137 .56 20 03 16.08 +27 23.5 03 19.08 +27 34.3 2.252 2.809 +0.24 + 1.8 17.2 3.7/ 61 114.7 18.6 79/1.49 102 .01 30 03 18.49 +27 41.3 03 21.50 +27 52.1 2.340 2.768 +0.52 + 2.4 17.1 7.3/ 70 105.2 20.1 78/1.55 35 .89 Feb. 9 03 23.64 +28 06.1 03 26.67 +28 16.6 2.433 2.726 +0.77 + 3.1 17.1 10.6/ 73 96.4 21.1 77/1.57 167 .55 19 03 31.33 +28 37.1 03 34.38 +28 47.1 2.528 2.686 +1.00 + 3.5 17.0 13.6/ 74 88.2 21.6 76/1.55 70 .03 Mar. 1 03 41.35 +29 13.1 03 44.43 +29 22.5 2.621 2.646 +1.21 + 3.9 17.0 16.3/ 76 80.6 21.7 75/1.51 68 .93 11 03 53.45 +29 52.5 03 56.56 +30 01.1 2.710 2.606 +1.40 + 4.0 16.9 18.6/ 77 73.4 21.4 75/1.44 167 .54 21 04 07.45 +30 33.3 04 10.60 +30 41.1 2.793 2.568 +1.58 + 3.9 16.8 20.7/ 78 66.7 20.9 75/1.37 41 .05 31 04 23.19 +31 13.8 04 26.37 +31 20.5 2.870 2.530 +1.73 + 3.7 16.8 22.4/ 79 60.4 20.1 75/1.29 95 .95 Apr. 10 04 40.49 +31 51.7 04 43.71 +31 57.3 2.939 2.494 +1.88 + 3.2 16.7 24.0/ 81 54.5 19.1 75/1.20 146 .52 20 04 59.23 +32 25.3 05 02.47 +32 29.5 3.000 2.459 +2.01 + 2.6 16.6 25.4/ 83 48.9 17.9 76/1.11 14 .09 30 05 19.25 +32 52.4 05 22.53 +32 55.3 3.053 2.425 +2.12 + 1.7 16.5 26.7/ 85 43.6 16.6 76/1.01 118 .97 May 10 05 40.42 +33 11.5 05 43.70 +33 12.8 3.097 2.393 +2.22 + 0.8 16.4 27.8/ 87 38.6 15.3 76/0.92 126 .49 20 06 02.58 +33 20.7 06 05.87 +33 20.4 3.133 2.362 +2.30 - 0.4 16.3 28.8/ 89 33.9 13.8 76/0.82 13 .15 30 06 25.56 +33 18.7 06 28.85 +33 16.7 3.161 2.333 +2.36 - 1.6 16.2 29.7/ 91 29.5 12.3 75/0.73 137 .98 June 9 06 49.20 +33 04.2 06 52.47 +33 00.5 3.182 2.305 +2.41 - 2.9 16.1 30.5/ 94 25.3 10.8 73/0.64 106 .44 19 07 13.32 +32 36.5 07 16.55 +32 31.1 3.196 2.280 +2.44 - 4.3 16.0 31.2/ 96 21.4 9.4 70/0.55 36 .20 29 07 37.73 +31 55.0 07 40.92 +31 48.0 3.203 2.257 +2.45 - 5.7 16.0 31.9/ 99 17.8 7.9 66/0.46 154 .99 July 9 08 02.25 +30 59.6 08 05.38 +30 51.0 3.204 2.236 +2.44 - 7.1 15.9 32.4/101 14.7 6.6 58/0.39 85 .37 19 08 26.74 +29 50.5 08 29.81 +29 40.4 3.200 2.217 +2.42 - 8.4 15.8 32.9/103 12.2 5.6 47/0.33 56 .26 29 08 51.04 +28 28.4 08 54.04 +28 16.9 3.190 2.201 +2.39 - 9.6 15.7 33.2/105 10.7 4.9 30/0.29 168 1.00 Aug. 8 09 15.04 +26 54.0 09 17.97 +26 41.4 3.176 2.187 +2.36 -10.6 15.6 33.5/107 10.5 4.9 10/0.29 63 .29 18 09 38.66 +25 08.7 09 41.52 +24 55.1 3.157 2.176 +2.31 -11.6 15.6 33.7/109 11.7 5.4 352/0.32 73 .30 28 10 01.83 +23 14.0 10 04.62 +22 59.4 3.134 2.167 +2.26 -12.3 15.5 33.8/110 14.0 6.5 339/0.39 167 1.00 Sept. 7 10 24.49 +21 11.2 10 27.23 +20 55.9 3.107 2.162 +2.21 -13.0 15.5 33.8/112 16.8 7.7 330/0.47 41 .21 17 10 46.65 +19 02.2 10 49.33 +18 46.3 3.076 2.159 +2.16 -13.4 15.5 33.6/113 20.1 9.2 323/0.56 88 .33 27 11 08.26 +16 48.7 11 10.90 +16 32.4 3.040 2.159 +2.10 -13.6 15.4 33.4/113 23.6 10.7 318/0.66 152 1.00 Oct. 7 11 29.35 +14 32.5 11 31.95 +14 16.0 3.000 2.162 +2.05 -13.7 15.4 33.0/114 27.4 12.3 314/0.76 22 .15 17 11 49.89 +12 15.4 11 52.46 +11 58.7 2.956 2.168 +2.00 -13.6 15.4 32.4/114 31.4 13.8 311/0.87 102 .34 27 12 09.88 +09 59.1 12 12.43 +09 42.4 2.907 2.176 +1.94 -13.4 15.4 31.8/115 35.6 15.4 308/0.98 132 .99 Nov. 6 12 29.31 +07 45.1 12 31.86 +07 28.5 2.852 2.187 +1.88 -13.0 15.4 30.9/115 40.0 16.9 306/1.09 13 .11 16 12 48.15 +05 34.9 12 50.69 +05 18.6 2.793 2.201 +1.82 -12.5 15.4 29.9/114 44.6 18.4 303/1.21 117 .36 26 13 06.35 +03 30.1 13 08.89 +03 14.1 2.728 2.217 +1.75 -11.8 15.4 28.8/114 49.5 19.8 301/1.33 111 .97 Dec. 6 13 23.84 +01 31.6 13 26.39 +01 16.0 2.658 2.236 +1.67 -11.1 15.5 27.4/114 54.6 21.1 299/1.44 25 .09 16 13 40.52 -00 19.5 13 43.08 -00 34.6 2.582 2.257 +1.58 -10.2 15.5 25.8/113 60.0 22.2 297/1.56 134 .38 26 13 56.26 -02 02.3 13 58.85 -02 16.9 2.501 2.280 +1.47 - 9.4 15.5 23.9/113 65.7 23.2 295/1.67 87 .94 2027 Jan. 5 14 10.93 -03 36.5 14 13.53 -03 50.5 2.416 2.306 +1.34 - 8.4 15.5 21.7/113 71.8 23.9 293/1.78 43 .07 15 14 24.30 -05 01.5 14 26.92 -05 14.9 2.326 2.333 +1.19 - 7.5 15.6 19.2/113 78.2 24.4 291/1.88 154 .41 25 14 36.15 -06 17.4 14 38.79 -06 30.3 2.234 2.362 +1.01 - 6.6 15.6 16.4/114 85.1 24.5 289/1.96 61 .91 Feb. 4 14 46.22 -07 24.3 14 48.88 -07 36.8 2.140 2.393 +0.80 - 5.8 15.6 13.2/116 92.4 24.3 287/2.02 64 .06 14 14 54.20 -08 22.6 14 56.88 -08 34.6 2.047 2.426 +0.56 - 5.0 15.6 9.7/121 100.3 23.6 285/2.05 165 .46 24 14 59.79 -09 12.9 15 02.48 -09 24.6 1.957 2.459 +0.29 - 4.3 15.7 6.1/135 108.7 22.4 284/2.02 33 .88 Mar. 6 15 02.71 -09 55.8 15 05.42 -10 07.4 1.873 2.495 0.00 - 3.6 15.7 3.6/179 117.8 20.6 282/1.94 91 .05