21P/Giacobini-Zinner Orbit by T. Kobayashi NK 4974 (2022) Last obs. 2020 01 30 (G96)
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2025 Mar. 25.20990 1.0089878 0.7111531 6.53 172.91446 195.34072 32.05378 0.200 2024 Mar. 31.0 m1 = 8.5 + 5 log Delta + 18.0 log r Date/ 0h TT R.A.(1950) Decl. R.A.(2000) Decl. Delta r Variation Magnitude Mot./PA Elong. P PA/Tail Moon Age h m ¡ , h m ¡ , for T=+1 day m1 , ¡ ¡ ¡ ¡ ¡ ¡ 2023 Dec. 22 15 09.16 -05 32.0 15 11.80 -05 43.2 4.920 4.264 -0.27 - 0.5 23.3 13.0/ 90 43.7 9.2 298/0.36 157 .74 2024 Jan. 1 15 17.83 -05 32.1 15 20.48 -05 42.9 4.753 4.212 -0.29 - 0.5 23.1 12.4/ 86 51.5 10.5 295/0.42 73 .78 11 15 26.10 -05 24.3 15 28.75 -05 34.6 4.571 4.160 -0.31 - 0.5 22.9 11.6/ 82 59.5 11.8 292/0.49 55 .01 21 15 33.81 -05 07.6 15 36.45 -05 17.4 4.377 4.106 -0.33 - 0.6 22.7 10.8/ 76 67.7 12.8 290/0.56 159 .79 31 15 40.80 -04 41.2 15 43.43 -04 50.6 4.175 4.052 -0.36 - 0.7 22.5 9.8/ 68 76.0 13.6 287/0.62 49 .77 Feb. 10 15 46.89 -04 04.3 15 49.52 -04 13.4 3.968 3.996 -0.38 - 0.7 22.3 8.9/ 57 84.5 14.2 284/0.68 86 .00 20 15 51.88 -03 16.4 15 54.50 -03 25.1 3.759 3.940 -0.41 - 0.8 22.1 8.1/ 43 93.2 14.5 282/0.73 132 .82 Mar. 1 15 55.57 -02 16.9 15 58.17 -02 25.4 3.552 3.882 -0.44 - 0.9 21.9 7.8/ 24 102.1 14.5 278/0.76 26 .75 11 15 57.76 -01 05.7 16 00.34 -01 14.1 3.351 3.823 -0.48 - 1.1 21.6 8.3/ 5 111.1 14.0 274/0.78 120 .01 21 15 58.22 +00 16.7 16 00.78 +00 08.4 3.161 3.763 -0.51 - 1.2 21.4 9.5/347 120.3 13.2 270/0.78 101 .84 31 15 56.81 +01 49.2 15 59.34 +01 40.7 2.986 3.702 -0.54 - 1.5 21.1 11.2/333 129.5 12.0 263/0.75 31 .72 Apr. 10 15 53.43 +03 29.4 15 55.93 +03 20.7 2.831 3.640 -0.56 - 1.7 20.9 13.1/322 138.3 10.6 254/0.69 149 .02 20 15 48.09 +05 13.6 15 50.57 +05 04.6 2.699 3.577 -0.58 - 2.0 20.6 14.8/314 146.2 9.0 241/0.62 69 .86 30 15 41.00 +06 56.8 15 43.46 +06 47.4 2.593 3.513 -0.60 - 2.4 20.4 15.9/307 151.7 7.8 220/0.56 65 .66 May 10 15 32.53 +08 33.1 15 34.96 +08 23.2 2.515 3.447 -0.60 - 2.8 20.2 16.1/301 153.2 7.6 194/0.56 140 .05 20 15 23.26 +09 56.3 15 25.67 +09 45.8 2.467 3.380 -0.58 - 3.1 20.0 15.3/295 149.8 8.7 170/0.65 39 .88 30 15 13.89 +11 01.4 15 16.29 +10 50.4 2.446 3.312 -0.56 - 3.4 19.8 13.6/289 142.9 10.6 152/0.80 106 .58 June 9 15 05.15 +11 45.1 15 07.54 +11 33.6 2.449 3.242 -0.53 - 3.7 19.6 11.1/281 134.4 12.9 139/0.97 106 .07 19 14 57.70 +12 06.5 15 00.10 +11 54.6 2.474 3.171 -0.50 - 3.8 19.5 8.3/270 125.3 15.2 130/1.12 33 .90 29 14 52.03 +12 06.8 14 54.43 +11 54.6 2.513 3.099 -0.47 - 3.8 19.3 5.6/251 116.2 17.1 124/1.25 141 .49 July 9 14 48.44 +11 48.3 14 50.85 +11 35.9 2.564 3.026 -0.44 - 3.8 19.2 4.0/210 107.3 18.7 118/1.34 74 .09 19 14 47.08 +11 14.1 14 49.49 +11 01.7 2.620 2.951 -0.41 - 3.6 19.1 4.8/165 98.7 19.9 113/1.39 56 .92 29 14 47.93 +10 27.6 14 50.36 +10 15.2 2.678 2.874 -0.40 - 3.5 18.9 7.2/141 90.6 20.7 109/1.41 150 .40 Aug. 8 14 50.94 +09 31.4 14 53.38 +09 19.2 2.734 2.797 -0.39 - 3.2 18.7 9.8/130 82.9 21.1 105/1.41 48 .11 18 14 56.00 +08 28.3 14 58.45 +08 16.3 2.785 2.717 -0.39 - 3.0 18.5 12.4/123 75.7 21.2 101/1.39 84 .95 28 15 02.98 +07 20.4 15 05.44 +07 08.8 2.827 2.637 -0.40 - 2.7 18.3 14.9/118 68.8 20.9 98/1.36 129 .33 Sept. 7 15 11.78 +06 09.5 15 14.25 +05 58.4 2.860 2.555 -0.41 - 2.4 18.1 17.3/114 62.4 20.5 94/1.31 30 .13 17 15 22.30 +04 57.3 15 24.79 +04 46.8 2.881 2.471 -0.43 - 2.1 17.9 19.6/111 56.4 19.8 90/1.27 110 .98 27 15 34.48 +03 45.3 15 36.98 +03 35.4 2.890 2.386 -0.46 - 1.8 17.6 21.8/109 50.8 19.0 85/1.21 107 .28 Oct. 7 15 48.28 +02 34.7 15 50.80 +02 25.7 2.886 2.300 -0.50 - 1.5 17.3 24.1/106 45.6 18.1 80/1.16 27 .15 17 16 03.68 +01 26.9 16 06.22 +01 18.9 2.868 2.212 -0.55 - 1.2 17.0 26.3/104 40.8 17.1 74/1.10 133 1.00 27 16 20.70 +00 23.3 16 23.26 +00 16.4 2.838 2.123 -0.61 - 0.9 16.6 28.6/101 36.5 16.2 68/1.05 89 .25 Nov. 6 16 39.38 -00 34.8 16 41.95 -00 40.4 2.796 2.032 -0.68 - 0.6 16.3 31.0/ 99 32.6 15.2 61/1.01 36 .18 16 16 59.76 -01 25.9 17 02.35 -01 30.1 2.742 1.941 -0.76 - 0.3 15.9 33.5/ 97 29.3 14.4 52/0.98 149 1.00 26 17 21.93 -02 08.5 17 24.54 -02 11.2 2.678 1.848 -0.86 - 0.1 15.4 36.2/ 95 26.5 13.8 44/0.95 76 .24 Dec. 6 17 45.99 -02 41.2 17 48.60 -02 42.1 2.606 1.755 -0.97 + 0.2 15.0 39.0/ 93 24.3 13.3 34/0.95 49 .23 16 18 12.01 -03 02.2 18 14.63 -03 01.3 2.528 1.662 -1.10 + 0.4 14.5 42.1/ 91 22.5 13.1 25/0.96 155 .99 26 18 40.11 -03 10.4 18 42.73 -03 07.4 2.447 1.570 -1.24 + 0.7 14.0 45.3/ 89 21.0 13.0 16/0.98 67 .23 2025 Jan. 5 19 10.37 -03 04.3 19 12.99 -02 59.2 2.365 1.478 -1.40 + 0.9 13.4 48.7/ 87 19.8 13.0 7/1.01 61 .28 15 19 42.86 -02 43.4 19 45.47 -02 36.0 2.286 1.389 -1.57 + 1.1 12.9 52.2/ 86 18.6 13.0 359/1.04 156 .99 25 20 17.59 -02 07.7 20 20.19 -01 58.2 2.211 1.304 -1.75 + 1.4 12.3 55.6/ 85 17.2 12.9 353/1.07 61 .22 Feb. 4 20 54.52 -01 18.3 20 57.10 -01 06.7 2.145 1.224 -1.94 + 1.7 11.7 58.8/ 84 15.5 12.5 349/1.06 71 .35 14 21 33.48 -00 17.5 21 36.05 -00 04.1 2.090 1.153 -2.12 + 2.2 11.2 61.5/ 83 13.5 11.5 346/1.00 159 .98 24 22 14.25 +00 50.9 22 16.80 +01 05.9 2.047 1.092 -2.28 + 2.8 10.7 63.7/ 83 11.1 10.0 346/0.89 56 .19 Mar. 6 22 56.45 +02 02.6 22 59.00 +02 18.7 2.018 1.046 -2.42 + 3.6 10.4 65.0/ 84 8.3 7.8 349/0.71 79 .42 16 23 39.59 +03 12.6 23 42.15 +03 29.2 2.004 1.018 -2.50 + 4.5 10.1 65.5/ 84 5.4 5.2 0/0.48 163 .97 26 00 23.13 +04 16.6 00 25.71 +04 33.2 2.004 1.009 -2.54 + 5.4 10.1 65.1/ 85 3.0 2.9 36/0.27 50 .16