12P/Pons-Brooks Orbit by S. Nakano CBET 4805 (2020) Observed in 2nd half of 2022
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2024 Apr. 21.01278 0.7808610 0.9545603 71.2 198.98689 255.85502 74.19061 0.200 2023 Sep. 13.0 m1 = 4.0 + 5 log Delta + 12.0 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 Dec. 27 18 23.55 +24 38.0 18 25.60 +24 39.8 6.400 5.788 +0.76 + 2.0 17.2 10.5/ 79 48.0 7.3 2/0.22 67 .18 2023 Jan. 6 18 31.11 +24 57.0 18 33.16 +24 59.3 6.311 5.703 +0.77 + 3.1 17.1 10.9/ 73 48.2 7.4 350/0.23 128 .99 16 18 38.81 +25 27.4 18 40.84 +25 30.3 6.208 5.618 +0.77 + 4.3 17.0 11.2/ 67 49.4 7.6 339/0.24 75 .41 26 18 46.52 +26 09.6 18 48.55 +26 13.0 6.090 5.531 +0.76 + 5.5 16.8 11.6/ 61 51.5 8.0 329/0.25 83 .23 Feb. 5 18 54.13 +27 03.7 18 56.14 +27 07.7 5.959 5.444 +0.74 + 6.7 16.7 11.8/ 55 54.4 8.5 319/0.27 123 .99 15 19 01.53 +28 09.7 19 03.52 +28 14.2 5.816 5.357 +0.70 + 7.8 16.6 12.1/ 49 57.9 9.0 310/0.30 63 .36 25 19 08.59 +29 27.7 19 10.55 +29 32.7 5.663 5.268 +0.65 + 9.0 16.4 12.4/ 43 61.8 9.5 301/0.32 98 .27 Mar. 7 19 15.16 +30 57.4 19 17.09 +31 02.9 5.502 5.179 +0.59 +10.1 16.3 12.6/ 36 66.1 10.1 293/0.35 113 1.00 17 19 21.09 +32 38.4 19 22.99 +32 44.2 5.335 5.089 +0.51 +11.2 16.1 12.9/ 29 70.5 10.6 285/0.38 60 .29 27 19 26.23 +34 30.0 19 28.08 +34 36.2 5.164 4.999 +0.41 +12.2 16.0 13.1/ 22 75.0 11.1 278/0.41 108 .30 Apr. 6 19 30.37 +36 31.4 19 32.17 +36 37.9 4.991 4.907 +0.29 +13.0 15.8 13.4/ 15 79.4 11.6 270/0.44 100 1.00 16 19 33.31 +38 41.2 19 35.05 +38 47.9 4.820 4.814 +0.14 +13.7 15.6 13.8/ 7 83.7 12.0 262/0.47 66 .22 26 19 34.79 +40 57.7 19 36.46 +41 04.5 4.652 4.721 -0.03 +14.1 15.4 14.1/359 87.8 12.3 254/0.50 111 .32 May 6 19 34.54 +43 18.3 19 36.14 +43 25.0 4.488 4.627 -0.24 +14.1 15.2 14.4/350 91.6 12.6 246/0.53 88 1.00 16 19 32.27 +45 39.9 19 33.78 +45 46.5 4.332 4.532 -0.47 +13.8 15.1 14.6/341 94.9 12.8 236/0.56 79 .15 26 19 27.67 +47 58.6 19 29.09 +48 04.9 4.185 4.436 -0.73 +13.0 14.9 14.9/332 97.7 13.1 226/0.59 107 .35 June 5 19 20.50 +50 09.3 19 21.81 +50 15.1 4.048 4.339 -1.00 +11.7 14.7 15.0/322 99.9 13.3 215/0.62 81 .99 15 19 10.60 +52 06.6 19 11.80 +52 11.7 3.922 4.241 -1.27 + 9.7 14.5 15.0/312 101.4 13.6 203/0.65 90 .10 25 18 58.05 +53 44.2 18 59.14 +53 48.5 3.807 4.142 -1.49 + 7.1 14.3 14.8/300 102.1 13.9 191/0.69 97 .37 July 5 18 43.26 +54 56.5 18 44.27 +54 59.7 3.704 4.041 -1.63 + 4.1 14.1 14.5/288 102.1 14.2 178/0.72 82 .96 15 18 27.01 +55 39.1 18 27.96 +55 41.1 3.611 3.940 -1.66 + 0.9 13.9 14.1/275 101.4 14.7 164/0.76 96 .07 25 18 10.42 +55 49.3 18 11.34 +55 50.0 3.529 3.837 -1.57 - 2.3 13.7 13.4/262 99.9 15.1 151/0.80 87 .41 Aug. 4 17 54.73 +55 27.7 17 55.68 +55 27.3 3.456 3.734 -1.36 - 5.1 13.6 12.8/248 97.9 15.6 137/0.85 91 .92 14 17 41.06 +54 37.5 17 42.06 +54 36.2 3.389 3.629 -1.08 - 7.5 13.4 12.1/233 95.5 16.1 125/0.89 95 .05 24 17 30.20 +53 23.7 17 31.28 +53 21.6 3.328 3.522 -0.75 - 9.2 13.2 11.4/218 92.7 16.7 113/0.93 79 .46 Sept. 3 17 22.58 +51 52.7 17 23.74 +51 50.0 3.269 3.415 -0.42 -10.3 13.0 11.0/202 89.6 17.2 102/0.98 101 .88 13 17 18.29 +50 10.4 17 19.54 +50 07.5 3.211 3.306 -0.10 -10.8 12.8 10.8/185 86.5 17.7 92/1.02 89 .04 23 17 17.26 +48 22.6 17 18.59 +48 19.6 3.152 3.195 +0.21 -10.8 12.5 11.0/169 83.3 18.2 83/1.07 77 .52 Oct. 3 17 19.28 +46 34.4 17 20.68 +46 31.5 3.091 3.083 +0.49 -10.5 12.3 11.7/153 80.3 18.7 74/1.12 107 .84 13 17 24.13 +44 49.5 17 25.60 +44 47.0 3.024 2.970 +0.76 - 9.7 12.1 12.7/139 77.3 19.1 66/1.17 82 .03 23 17 31.64 +43 11.5 17 33.16 +43 09.5 2.952 2.854 +1.01 - 8.8 11.8 14.2/127 74.6 19.6 58/1.23 81 .60 Nov. 2 17 41.64 +41 43.1 17 43.21 +41 41.8 2.873 2.737 +1.25 - 7.6 11.5 16.0/117 72.2 20.2 50/1.29 110 .81 12 17 54.07 +40 26.3 17 55.68 +40 25.9 2.786 2.619 +1.49 - 6.2 11.2 18.2/109 70.0 20.8 43/1.37 76 .02 22 18 08.92 +39 23.0 18 10.57 +39 23.7 2.692 2.498 +1.73 - 4.7 10.9 20.8/102 68.1 21.5 36/1.46 86 .67 Dec. 2 18 26.24 +38 34.4 18 27.92 +38 36.4 2.591 2.376 +2.00 - 3.2 10.6 23.7/ 96 66.4 22.4 30/1.57 111 .79 12 18 46.18 +38 00.9 18 47.89 +38 04.3 2.484 2.252 +2.28 - 1.7 10.2 27.1/ 92 65.0 23.3 24/1.70 72 .01 22 19 09.00 +37 42.7 19 10.74 +37 47.7 2.372 2.126 +2.60 - 0.3 9.8 30.9/ 88 63.6 24.5 19/1.86 89 .74 2024 Jan. 1 19 35.00 +37 38.3 19 36.78 +37 45.1 2.258 1.998 +2.97 + 0.8 9.4 35.2/ 86 62.2 25.8 14/2.05 114 .78 11 20 04.63 +37 44.5 20 06.46 +37 53.2 2.143 1.868 +3.38 + 1.3 8.9 39.9/ 85 60.6 27.3 11/2.26 67 .01 21 20 38.35 +37 55.9 20 40.25 +38 06.6 2.031 1.737 +3.83 + 0.9 8.4 45.1/ 86 58.7 28.9 9/2.51 91 .79 31 21 16.55 +38 02.8 21 18.54 +38 15.5 1.926 1.605 +4.30 - 0.9 7.9 50.6/ 88 56.3 30.7 8/2.79 124 .77 Feb. 10 21 59.37 +37 51.6 22 01.49 +38 06.1 1.831 1.472 +4.72 - 4.5 7.3 56.1/ 91 53.3 32.5 9/3.07 57 .00 20 22 46.36 +37 05.3 22 48.66 +37 21.1 1.751 1.339 +5.01 -10.0 6.7 61.1/ 96 49.5 34.1 12/3.35 93 .82 Mar. 1 23 36.25 +35 24.9 23 38.73 +35 41.5 1.689 1.209 +5.09 -16.9 6.1 65.3/101 44.9 35.3 18/3.57 138 .75 11 00 27.01 +32 36.0 00 29.66 +32 52.6 1.645 1.085 +4.94 -24.4 5.5 68.1/108 39.7 35.8 26/3.70 35 .01 21 01 16.32 +28 32.7 01 19.08 +28 48.5 1.621 0.971 +4.60 -31.5 4.9 69.4/114 34.0 35.0 36/3.68 102 .84 31 02 02.29 +23 19.1 02 05.10 +23 33.5 1.611 0.875 +4.17 -37.2 4.3 69.4/121 28.6 33.1 50/3.51 143 .72