21P/Giacobini-Zinner Orbit by S. Nakano NK 5329 (2024) Observed in 2nd half of 2024
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2025 Mar. 25.35453 1.0089502 0.7110271 6.52 172.93272 195.33157 32.05114 0.200 2025 May 5.0 m1 = 8.5 + 5 log Delta + 18.0 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 , ¡ ¡ ¡ ¡ ¡ ¡ 2024 Dec. 26 18 39.96 -03 10.3 18 42.58 -03 07.3 2.448 1.571 +3.02 + 0.8 14.0 45.3/ 89 21.0 13.0 15/0.97 67 .23 2025 Jan. 5 19 10.21 -03 04.2 19 12.82 -02 59.0 2.366 1.479 +3.25 + 2.3 13.4 48.7/ 87 19.8 13.0 7/1.01 62 .28 15 19 42.67 -02 43.2 19 45.28 -02 35.9 2.287 1.390 +3.47 + 3.8 12.9 52.1/ 86 18.6 13.0 359/1.04 156 .99 25 20 17.38 -02 07.5 20 19.97 -01 58.0 2.212 1.305 +3.69 + 5.2 12.3 55.6/ 85 17.2 12.9 353/1.06 61 .22 Feb. 4 20 54.28 -01 18.0 20 56.86 -01 06.4 2.146 1.225 +3.89 + 6.3 11.7 58.7/ 84 15.6 12.5 348/1.06 71 .35 14 21 33.23 -00 17.2 21 35.79 -00 03.8 2.090 1.153 +4.07 + 7.0 11.2 61.5/ 83 13.5 11.5 345/1.00 159 .98 24 22 13.97 +00 51.3 22 16.53 +01 06.3 2.047 1.093 +4.22 + 7.3 10.8 63.7/ 83 11.1 10.0 345/0.89 55 .19 Mar. 6 22 56.16 +02 03.1 22 58.71 +02 19.2 2.018 1.047 +4.31 + 7.1 10.4 65.0/ 84 8.3 7.9 347/0.71 79 .42 16 23 39.29 +03 13.2 23 41.85 +03 29.8 2.004 1.018 +4.36 + 6.4 10.1 65.5/ 84 5.4 5.2 358/0.48 163 .97 26 00 22.84 +04 17.2 00 25.41 +04 33.8 2.004 1.009 +4.34 + 5.4 10.1 65.1/ 85 2.9 2.9 32/0.26 50 .16 Apr. 5 01 06.21 +05 11.9 01 08.80 +05 27.8 2.018 1.021 +4.26 + 4.1 10.2 63.8/ 86 3.3 3.2 99/0.29 86 .49 15 01 48.83 +05 54.5 01 51.44 +06 09.3 2.044 1.052 +4.14 + 2.8 10.4 61.8/ 87 5.9 5.6 127/0.50 160 .96 25 02 30.21 +06 23.8 02 32.85 +06 37.0 2.084 1.100 +3.98 + 1.3 10.8 59.3/ 88 8.6 7.9 139/0.69 43 .11 May 5 03 09.98 +06 39.0 03 12.64 +06 50.2 2.135 1.162 +3.79 - 0.1 11.3 56.4/ 90 11.1 9.6 147/0.82 92 .54 15 03 47.82 +06 39.7 03 50.49 +06 48.7 2.196 1.235 +3.58 - 1.6 11.9 53.3/ 91 13.3 10.8 155/0.90 151 .95 25 04 23.58 +06 26.4 04 26.26 +06 33.2 2.266 1.315 +3.36 - 2.9 12.4 50.2/ 93 15.1 11.6 162/0.93 37 .07 June 4 04 57.18 +05 59.8 04 59.86 +06 04.2 2.343 1.401 +3.14 - 4.1 13.0 47.1/ 95 16.6 11.9 170/0.93 98 .58 14 05 28.60 +05 20.9 05 31.27 +05 23.1 2.424 1.491 +2.93 - 5.2 13.5 44.1/ 96 17.9 12.1 178/0.91 142 .93 24 05 57.90 +04 30.9 06 00.55 +04 31.0 2.508 1.582 +2.72 - 6.2 14.1 41.2/ 98 19.0 12.1 187/0.89 29 .03 July 4 06 25.17 +03 31.1 06 27.80 +03 29.2 2.591 1.675 +2.53 - 7.0 14.6 38.6/100 20.3 12.1 196/0.86 105 .61 14 06 50.51 +02 22.9 06 53.11 +02 19.1 2.672 1.768 +2.35 - 7.7 15.1 36.1/102 21.7 12.3 206/0.85 130 .89 24 07 14.04 +01 07.3 07 16.63 +01 01.9 2.749 1.861 +2.18 - 8.3 15.6 33.8/104 23.4 12.5 215/0.84 25 .01 Aug. 3 07 35.89 -00 14.5 07 38.44 -00 21.3 2.820 1.953 +2.02 - 8.8 16.0 31.6/106 25.5 12.9 224/0.85 116 .64 13 07 56.13 -01 41.4 07 58.66 -01 49.6 2.882 2.045 +1.87 - 9.2 16.4 29.5/108 28.1 13.5 233/0.87 113 .84 23 08 14.87 -03 12.6 08 17.38 -03 22.0 2.935 2.135 +1.73 - 9.6 16.8 27.6/110 31.2 14.2 241/0.90 31 .00 Sept. 2 08 32.16 -04 47.4 08 34.65 -04 57.7 2.977 2.224 +1.59 - 9.8 17.1 25.6/113 34.8 15.0 248/0.94 129 .66 12 08 48.04 -06 24.7 08 50.51 -06 36.0 3.007 2.312 +1.45 -10.0 17.4 23.7/115 38.9 15.9 255/0.98 92 .77 22 09 02.54 -08 04.0 09 04.99 -08 16.0 3.025 2.398 +1.31 -10.1 17.7 21.8/118 43.5 16.7 260/1.03 44 .00 Oct. 2 09 15.63 -09 44.3 09 18.07 -09 57.0 3.029 2.483 +1.16 -10.1 18.0 19.9/121 48.5 17.6 266/1.07 144 .70 12 09 27.27 -11 24.8 09 29.69 -11 38.0 3.021 2.566 +1.01 -10.0 18.3 17.9/124 54.1 18.4 271/1.12 68 .69 22 09 37.40 -13 04.7 09 39.81 -13 18.3 3.001 2.648 +0.85 - 9.8 18.5 15.8/129 60.0 19.0 275/1.17 63 .00 Nov. 1 09 45.89 -14 42.6 09 48.29 -14 56.5 2.968 2.728 +0.67 - 9.5 18.7 13.6/135 66.5 19.5 279/1.21 153 .73 11 09 52.63 -16 17.0 09 55.02 -16 31.3 2.926 2.807 +0.48 - 8.9 18.9 11.3/143 73.4 19.8 284/1.24 45 .63 21 09 57.45 -17 46.3 09 59.83 -18 00.7 2.875 2.885 +0.27 - 8.2 19.1 9.0/155 80.7 19.8 288/1.26 85 .01 Dec. 1 10 00.18 -19 08.0 10 02.55 -19 22.5 2.818 2.961 +0.05 - 7.1 19.2 7.1/174 88.5 19.4 292/1.27 139 .78 11 10 00.69 -20 19.1 10 03.04 -20 33.6 2.759 3.036 -0.18 - 5.7 19.4 6.3/204 96.7 18.8 298/1.25 31 .59 21 09 58.86 -21 16.1 10 01.20 -21 30.6 2.702 3.109 -0.42 - 3.9 19.5 7.0/236 105.2 17.8 303/1.20 111 .01 31 09 54.71 -21 54.9 09 57.04 -22 09.3 2.651 3.181 -0.63 - 1.6 19.7 8.9/259 114.1 16.4 310/1.13 108 .84 2026 Jan. 10 09 48.44 -22 11.6 09 50.76 -22 25.7 2.611 3.252 -0.80 + 0.9 19.8 11.2/274 122.9 14.7 319/1.03 43 .56 20 09 40.43 -22 02.7 09 42.73 -22 16.4 2.586 3.321 -0.92 + 3.7 19.9 13.2/286 131.5 12.8 330/0.91 138 .01 30 09 31.28 -21 26.5 09 33.58 -21 39.8 2.583 3.389 -0.95 + 6.3 20.1 14.7/295 139.0 11.0 344/0.78 71 .89 Feb. 9 09 21.79 -20 24.0 09 24.08 -20 37.0 2.605 3.456 -0.90 + 8.5 20.3 15.3/303 144.5 9.5 3/0.67 73 .55 19 09 12.73 -18 59.2 09 15.04 -19 11.7 2.653 3.521 -0.79 +10.2 20.5 15.1/312 146.6 8.9 25/0.62 142 .03 Mar. 1 09 04.84 -17 18.0 09 07.16 -17 30.2 2.730 3.586 -0.62 +11.0 20.7 14.2/321 144.8 9.2 47/0.62 38 .93