18D/Perrine-Mrkos Orbit by S. Nakano NK 5033 (2006) Last obs. 1969 01 13 (370)

Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2025 Jan. 1.66515 1.6358138 0.5852492 7.83 157.04860 237.92567 16.91096 0.200 2024 Mar. 31.0 m1 = 11.5 + 5 log Delta + 20.0 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 18 16.06 -15 02.4 18 18.92 -15 01.1 4.527 3.562 -0.38 - 1.4 25.8 19.2/ 84 9.8 2.7 30/0.11 113 .74 2024 Jan. 1 18 29.22 -14 43.4 18 32.07 -14 41.2 4.475 3.506 -0.40 - 1.5 25.7 19.7/ 83 8.7 2.4 345/0.10 121 .78 11 18 42.63 -14 17.6 18 45.47 -14 14.4 4.404 3.450 -0.42 - 1.6 25.5 20.0/ 81 12.4 3.5 310/0.15 14 .01 21 18 56.22 -13 44.6 18 59.05 -13 40.5 4.316 3.393 -0.44 - 1.8 25.3 20.3/ 79 17.9 5.1 294/0.23 139 .79 31 19 09.89 -13 04.3 19 12.69 -12 59.2 4.210 3.335 -0.47 - 2.0 25.1 20.6/ 77 24.1 6.9 284/0.31 100 .77 Feb. 10 19 23.56 -12 16.4 19 26.34 -12 10.3 4.090 3.277 -0.50 - 2.2 24.9 20.7/ 75 30.4 8.8 278/0.41 33 .00 20 19 37.14 -11 20.8 19 39.90 -11 13.8 3.955 3.219 -0.53 - 2.4 24.6 20.7/ 72 36.8 10.6 274/0.51 159 .82 Mar. 1 19 50.55 -10 17.6 19 53.29 -10 09.8 3.807 3.159 -0.56 - 2.6 24.4 20.7/ 70 43.3 12.4 270/0.62 79 .75 11 20 03.72 -09 06.8 20 06.44 -08 58.1 3.649 3.100 -0.60 - 2.9 24.1 20.6/ 68 49.7 14.1 267/0.73 59 .01 21 20 16.56 -07 48.4 20 19.25 -07 39.0 3.481 3.039 -0.65 - 3.2 23.9 20.4/ 65 56.1 15.8 265/0.85 162 .84 31 20 28.98 -06 22.7 20 31.64 -06 12.6 3.306 2.979 -0.69 - 3.5 23.6 20.1/ 62 62.4 17.3 262/0.97 56 .72 Apr. 10 20 40.90 -04 49.9 20 43.53 -04 39.0 3.125 2.917 -0.75 - 3.9 23.3 19.6/ 59 68.8 18.7 260/1.11 85 .02 20 20 52.21 -03 10.2 20 54.81 -02 58.7 2.941 2.856 -0.81 - 4.3 23.0 19.1/ 56 75.2 19.9 257/1.25 145 .86 30 21 02.79 -01 23.9 21 05.37 -01 11.9 2.756 2.794 -0.89 - 4.8 22.6 18.4/ 52 81.7 20.9 255/1.39 34 .66 May 10 21 12.52 +00 28.4 21 15.07 +00 40.9 2.571 2.732 -0.97 - 5.3 22.3 17.6/ 48 88.2 21.7 252/1.54 110 .05 20 21 21.22 +02 26.1 21 23.76 +02 39.0 2.388 2.669 -1.06 - 5.8 21.9 16.6/ 42 94.7 22.2 250/1.68 124 .88 30 21 28.74 +04 28.3 21 31.24 +04 41.5 2.210 2.607 -1.17 - 6.4 21.5 15.5/ 36 101.4 22.4 247/1.82 22 .58 June 9 21 34.82 +06 33.7 21 37.31 +06 47.2 2.039 2.544 -1.30 - 7.2 21.2 14.2/ 27 108.1 22.3 243/1.95 134 .07 19 21 39.24 +08 40.1 21 41.70 +08 53.8 1.875 2.482 -1.44 - 8.0 20.8 13.0/ 16 115.0 21.8 239/2.06 100 .90 29 21 41.72 +10 44.8 21 44.17 +10 58.6 1.723 2.420 -1.60 - 9.0 20.4 11.9/ 2 121.9 20.9 234/2.14 42 .49 July 9 21 42.02 +12 43.7 21 44.44 +12 57.5 1.583 2.358 -1.76 -10.2 19.9 11.1/344 128.9 19.6 227/2.17 150 .09 19 21 39.94 +14 31.0 21 42.34 +14 44.7 1.458 2.297 -1.93 -11.6 19.5 11.0/324 135.6 18.0 217/2.15 73 .92 29 21 35.52 +15 59.9 21 37.90 +16 13.5 1.349 2.236 -2.09 -13.2 19.1 11.3/304 141.6 16.4 205/2.09 75 .40 Aug. 8 21 29.01 +17 02.4 21 31.37 +17 15.6 1.259 2.176 -2.21 -14.9 18.8 11.6/284 146.3 15.0 188/2.04 142 .11 18 21 21.15 +17 31.2 21 23.48 +17 44.1 1.188 2.118 -2.29 -16.6 18.4 11.7/266 148.5 14.5 168/2.07 45 .95 28 21 13.02 +17 22.4 21 15.35 +17 34.9 1.136 2.061 -2.31 -17.9 18.1 11.1/246 147.5 15.3 146/2.27 110 .33 Sept. 7 21 05.96 +16 36.2 21 08.29 +16 48.4 1.104 2.006 -2.27 -18.7 17.8 10.2/221 143.6 17.4 127/2.64 115 .13 17 21 01.32 +15 18.9 21 03.67 +15 30.8 1.088 1.953 -2.19 -18.8 17.5 10.0/190 137.7 20.3 111/3.11 36 .98 27 21 00.09 +13 40.5 21 02.46 +13 52.4 1.089 1.902 -2.10 -18.1 17.3 11.5/159 130.9 23.5 100/3.58 140 .28 Oct. 7 21 02.85 +11 52.5 21 05.25 +12 04.5 1.101 1.855 -2.02 -17.0 17.1 14.8/136 123.9 26.6 91/4.00 86 .15 17 21 09.78 +10 05.8 21 12.21 +10 18.2 1.125 1.811 -1.96 -15.5 16.9 18.8/121 117.1 29.3 85/4.32 57 1.00 27 21 20.70 +08 29.0 21 23.16 +08 41.9 1.157 1.771 -1.92 -13.8 16.8 23.1/110 110.6 31.7 80/4.53 153 .25 Nov. 6 21 35.28 +07 08.0 21 37.76 +07 21.6 1.195 1.735 -1.90 -12.2 16.7 27.2/103 104.6 33.6 75/4.64 60 .18 16 21 53.08 +06 06.9 21 55.58 +06 21.2 1.240 1.704 -1.91 -10.7 16.6 30.9/ 97 99.1 35.0 72/4.67 81 1.00 26 22 13.59 +05 27.3 22 16.10 +05 42.3 1.290 1.678 -1.92 - 9.3 16.5 34.0/ 93 94.0 35.9 69/4.62 149 .24 Dec. 6 22 36.34 +05 09.6 22 38.86 +05 25.2 1.345 1.658 -1.94 - 8.0 16.5 36.6/ 89 89.4 36.4 67/4.51 37 .23 16 23 00.86 +05 12.8 23 03.40 +05 28.9 1.405 1.645 -1.97 - 6.9 16.6 38.6/ 86 85.0 36.6 66/4.35 102 .99 26 23 26.70 +05 34.6 23 29.24 +05 51.1 1.471 1.637 -1.98 - 5.9 16.6 40.2/ 84 81.0 36.4 65/4.16 138 .23 2025 Jan. 5 23 53.49 +06 12.4 23 56.05 +06 29.1 1.543 1.636 -1.99 - 5.0 16.7 41.2/ 83 77.2 35.9 65/3.93 15 .28 15 00 20.90 +07 02.7 00 23.48 +07 19.3 1.621 1.641 -1.98 - 4.1 16.9 41.7/ 81 73.6 35.1 65/3.68 119 .99 25 00 48.65 +08 01.7 00 51.25 +08 18.0 1.704 1.653 -1.96 - 3.3 17.0 41.9/ 81 70.1 34.1 66/3.42 125 .22 Feb. 4 01 16.54 +09 06.0 01 19.16 +09 21.7 1.794 1.671 -1.92 - 2.4 17.2 41.7/ 80 66.7 32.8 68/3.16 6 .35 14 01 44.39 +10 11.8 01 47.04 +10 26.8 1.889 1.695 -1.88 - 1.6 17.5 41.3/ 81 63.4 31.4 69/2.89 133 .98 24 02 12.06 +11 16.1 02 14.74 +11 30.0 1.989 1.724 -1.82 - 0.8 17.7 40.7/ 81 60.1 29.8 72/2.63 112 .19 Mar. 6 02 39.46 +12 16.0 02 42.18 +12 28.8 2.094 1.758 -1.75 0.0 18.0 39.9/ 82 56.7 28.2 74/2.37 26 .42 16 03 06.50 +13 09.3 03 09.25 +13 20.7 2.202 1.797 -1.67 + 0.7 18.3 39.1/ 83 53.4 26.4 77/2.13 145 .97 26 03 33.10 +13 54.1 03 35.89 +14 04.0 2.314 1.840 -1.59 + 1.4 18.6 38.1/ 84 50.0 24.5 81/1.90 97 .16

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