121P/Shoemaker-Holt Orbit by S. Nakano NK 4259 (2020) Observed in 2nd half of 2021
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2023 June 28.13879 3.7307590 0.1860681 9.81 11.56462 94.11537 20.16487 0.200 2022 Aug. 9.0 m1 = 4.5 + 5 log Delta + 20.0 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 , ¡ ¡ ¡ ¡ ¡ ¡ 2022 Jan. 1 01 36.30 -10 26.7 01 38.77 -10 11.5 3.957 4.211 +0.22 + 7.2 20.0 7.9/ 24 98.2 13.4 65/0.64 121 .05 11 01 38.49 -09 14.6 01 40.98 -08 59.5 4.088 4.197 +0.36 + 7.7 20.0 9.3/ 35 89.6 13.6 68/0.63 21 .62 21 01 42.07 -07 57.7 01 44.56 -07 42.7 4.219 4.182 +0.48 + 8.0 20.1 10.8/ 42 81.1 13.4 71/0.60 133 .91 31 01 46.89 -06 37.5 01 49.40 -06 22.7 4.349 4.168 +0.60 + 8.2 20.1 12.1/ 47 73.0 13.1 74/0.57 88 .02 Feb. 10 01 52.84 -05 15.3 01 55.35 -05 00.6 4.472 4.154 +0.69 + 8.3 20.1 13.3/ 52 65.1 12.4 76/0.53 44 .63 20 01 59.77 -03 52.3 02 02.29 -03 37.9 4.587 4.140 +0.78 + 8.3 20.1 14.3/ 55 57.4 11.6 79/0.48 160 .88 Mar. 2 02 07.56 -02 29.4 02 10.09 -02 15.3 4.691 4.126 +0.85 + 8.2 20.2 15.2/ 58 50.0 10.6 82/0.43 58 .01 12 02 16.09 -01 07.5 02 18.64 -00 53.7 4.783 4.112 +0.92 + 8.0 20.2 15.9/ 60 42.9 9.5 86/0.38 68 .64 22 02 25.26 +00 12.8 02 27.83 +00 26.2 4.862 4.098 +0.97 + 7.8 20.2 16.5/ 62 36.0 8.2 90/0.32 161 .84 Apr. 1 02 34.97 +01 30.7 02 37.55 +01 43.7 4.925 4.084 +1.02 + 7.5 20.2 17.0/ 64 29.4 6.9 96/0.27 31 .00 11 02 45.14 +02 45.8 02 47.74 +02 58.3 4.972 4.071 +1.06 + 7.1 20.2 17.3/ 66 23.2 5.6 104/0.21 91 .66 21 02 55.67 +03 57.5 02 58.29 +04 09.4 5.003 4.057 +1.08 + 6.7 20.2 17.6/ 67 17.6 4.3 116/0.17 134 .77 May 1 03 06.50 +05 05.4 03 09.14 +05 16.8 5.018 4.044 +1.11 + 6.3 20.1 17.7/ 69 13.3 3.3 137/0.13 12 .00 11 03 17.55 +06 09.2 03 20.21 +06 20.0 5.015 4.031 +1.12 + 5.9 20.1 17.7/ 70 11.7 2.9 168/0.11 114 .69 21 03 28.75 +07 08.6 03 31.42 +07 18.7 4.995 4.018 +1.13 + 5.4 20.1 17.6/ 72 13.5 3.4 199/0.13 105 .70 31 03 40.02 +08 03.2 03 42.72 +08 12.7 4.959 4.006 +1.13 + 4.9 20.0 17.4/ 73 17.8 4.4 219/0.17 24 .00 June 10 03 51.30 +08 52.9 03 54.01 +09 01.8 4.906 3.993 +1.12 + 4.4 20.0 17.2/ 75 23.2 5.7 231/0.22 139 .74 20 04 02.49 +09 37.6 04 05.22 +09 45.7 4.838 3.981 +1.10 + 3.9 19.9 16.8/ 76 29.1 7.1 239/0.28 76 .62 30 04 13.52 +10 17.2 04 16.26 +10 24.6 4.754 3.969 +1.08 + 3.4 19.9 16.2/ 78 35.3 8.5 244/0.34 46 .01 July 10 04 24.29 +10 51.7 04 27.05 +10 58.4 4.656 3.957 +1.04 + 2.9 19.8 15.6/ 79 41.8 9.9 249/0.40 164 .80 20 04 34.69 +11 21.2 04 37.46 +11 27.1 4.546 3.945 +0.99 + 2.4 19.7 14.8/ 80 48.4 11.1 252/0.47 50 .56 30 04 44.63 +11 45.8 04 47.41 +11 51.1 4.423 3.934 +0.93 + 1.9 19.6 13.8/ 82 55.3 12.2 255/0.53 70 .02 Aug. 9 04 53.96 +12 05.9 04 56.75 +12 10.6 4.289 3.923 +0.86 + 1.5 19.5 12.7/ 83 62.3 13.2 258/0.58 157 .86 19 05 02.55 +12 21.9 05 05.35 +12 26.0 4.147 3.912 +0.77 + 1.2 19.4 11.3/ 84 69.6 14.0 261/0.64 25 .52 29 05 10.25 +12 34.3 05 13.05 +12 37.8 3.998 3.901 +0.66 + 0.9 19.3 9.7/ 85 77.2 14.6 263/0.69 97 .03 Sept. 8 05 16.88 +12 43.7 05 19.69 +12 46.7 3.845 3.891 +0.54 + 0.7 19.2 7.9/ 85 85.1 15.0 265/0.73 126 .92 18 05 22.27 +12 51.0 05 25.08 +12 53.6 3.690 3.881 +0.40 + 0.6 19.1 5.8/ 84 93.4 15.0 267/0.76 14 .49 28 05 26.23 +12 57.0 05 29.04 +12 59.3 3.536 3.871 +0.24 + 0.6 19.0 3.5/ 81 102.0 14.7 269/0.78 127 .05 Oct. 8 05 28.58 +13 02.8 05 31.40 +13 04.9 3.387 3.861 +0.06 + 0.7 18.9 1.1/ 53 111.1 14.0 271/0.77 92 .96 18 05 29.18 +13 09.4 05 32.01 +13 11.6 3.247 3.852 -0.12 + 0.9 18.8 2.0/296 120.7 12.9 273/0.74 37 .47 28 05 27.95 +13 18.0 05 30.77 +13 20.3 3.120 3.843 -0.31 + 1.2 18.7 4.6/285 130.7 11.3 276/0.68 160 .08 Nov. 7 05 24.87 +13 29.7 05 27.70 +13 32.1 3.011 3.834 -0.47 + 1.6 18.6 7.1/283 141.2 9.3 279/0.58 55 .98 17 05 20.12 +13 45.1 05 22.95 +13 47.9 2.925 3.826 -0.61 + 2.0 18.5 9.2/283 151.9 7.0 284/0.45 70 .46 27 05 13.98 +14 04.9 05 16.82 +14 08.2 2.864 3.818 -0.70 + 2.5 18.4 10.5/284 162.6 4.4 296/0.29 150 .13 Dec. 7 05 06.96 +14 29.4 05 09.80 +14 33.1 2.834 3.810 -0.73 + 2.9 18.4 11.0/286 171.1 2.3 334/0.15 19 .99 17 04 59.66 +14 58.3 05 02.51 +15 02.5 2.833 3.802 -0.69 + 3.4 18.4 10.6/289 168.4 3.0 43/0.20 106 .44 27 04 52.74 +15 31.4 04 55.60 +15 36.1 2.864 3.795 -0.59 + 3.7 18.4 9.3/294 158.4 5.5 66/0.36 108 .18 2023 Jan. 6 04 46.81 +16 08.2 04 49.68 +16 13.3 2.923 3.789 -0.44 + 4.0 18.4 7.5/302 147.4 8.0 73/0.51 24 .99 16 04 42.36 +16 48.1 04 45.24 +16 53.6 3.007 3.782 -0.27 + 4.3 18.4 5.7/318 136.5 10.3 77/0.64 144 .41 26 04 39.70 +17 30.7 04 42.59 +17 36.3 3.113 3.776 -0.07 + 4.5 18.5 4.6/347 126.0 12.2 79/0.73 69 .23 Feb. 5 04 38.98 +18 15.1 04 41.88 +18 20.8 3.235 3.771 +0.12 + 4.6 18.6 4.9/ 21 115.8 13.6 81/0.79 56 .99 15 04 40.20 +19 00.9 04 43.13 +19 06.5 3.369 3.765 +0.31 + 4.6 18.7 6.4/ 44 106.1 14.6 82/0.81 174 .36 25 04 43.30 +19 47.1 04 46.24 +19 52.5 3.511 3.760 +0.49 + 4.6 18.7 8.2/ 56 96.9 15.1 82/0.81 34 .27 Mar. 7 04 48.14 +20 33.2 04 51.10 +20 38.2 3.656 3.756 +0.64 + 4.5 18.8 10.0/ 63 88.1 15.3 83/0.79 86 1.00 17 04 54.53 +21 18.3 04 57.52 +21 22.9 3.800 3.751 +0.78 + 4.3 18.9 11.7/ 68 79.7 15.1 84/0.75 144 .29 27 05 02.33 +22 01.8 05 05.33 +22 05.9 3.941 3.748 +0.90 + 4.1 19.0 13.2/ 72 71.6 14.6 85/0.70 7 .30 Apr. 6 05 11.35 +22 43.0 05 14.37 +22 46.4 4.075 3.744 +1.01 + 3.8 19.0 14.4/ 74 63.9 13.9 86/0.64 114 1.00 16 05 21.43 +23 21.3 05 24.46 +23 24.0 4.201 3.741 +1.10 + 3.4 19.1 15.5/ 77 56.4 12.9 86/0.58 111 .22 26 05 32.42 +23 56.2 05 35.47 +23 58.1 4.317 3.738 +1.18 + 3.0 19.1 16.4/ 79 49.2 11.8 87/0.52 20 .32 May 6 05 44.19 +24 27.2 05 47.26 +24 28.3 4.421 3.736 +1.24 + 2.6 19.2 17.1/ 81 42.2 10.4 88/0.45 141 1.00 16 05 56.60 +24 54.1 05 59.68 +24 54.2 4.512 3.734 +1.30 + 2.2 19.2 17.7/ 82 35.4 9.0 88/0.38 81 .15