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. 1.67844 1.6355052 0.5854296 7.84 157.05918 237.92381 16.90980 0.200 2025 May 5.0 m1 = 11.5 + 5 log Delta + 20.0 log r m2 = 15.5 + 5 log Delta + 5.0 log r + 0.03 phase 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 m2 , ¡ ¡ ¡ ¡ ¡ ¡ 2024 Dec. 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 65/3.69 119 .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 66/3.43 125 .22 Feb. 4 01 16.54 +09 06.0 01 19.16 +09 21.7 1.794 1.671 -1.93 - 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 69/2.90 133 .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 74/2.38 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 77/2.14 145 .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 81/1.91 97 .16 Apr. 5 03 59.22 +14 29.1 04 02.04 +14 37.4 2.428 1.886 -1.51 + 2.0 18.9 . 37.2/ 86 46.6 22.7 84/1.69 44 .49 15 04 24.79 +14 53.4 04 27.62 +15 00.1 2.543 1.935 -1.42 + 2.6 19.3 . 36.2/ 87 43.1 20.7 88/1.49 156 .96 25 04 49.74 +15 06.6 04 52.59 +15 11.5 2.658 1.988 -1.33 + 3.0 19.6 . 35.2/ 89 39.5 18.8 92/1.30 79 .11 May 5 05 14.05 +15 08.4 05 16.91 +15 11.6 2.772 2.042 -1.24 + 3.4 . 19.8 34.2/ 91 35.9 16.8 97/1.12 61 .54 15 05 37.66 +14 59.0 05 40.52 +15 00.5 2.884 2.098 -1.16 + 3.7 . 19.9 33.2/ 93 32.2 14.9 102/0.95 165 .95 25 06 00.54 +14 38.7 06 03.39 +14 38.6 2.993 2.156 -1.08 + 4.0 . 19.9 32.3/ 95 28.4 12.9 107/0.80 58 .07 June 4 06 22.67 +14 08.1 06 25.51 +14 06.4 3.097 2.216 -1.00 + 4.1 . 20.0 31.3/ 97 24.6 11.0 113/0.66 77 .58 14 06 44.01 +13 27.8 06 46.83 +13 24.6 3.196 2.276 -0.93 + 4.2 . 20.1 30.4/ 99 20.9 9.2 121/0.54 162 .93 24 07 04.56 +12 38.7 07 07.36 +12 33.9 3.288 2.337 -0.86 + 4.3 . 20.2 29.5/101 17.3 7.4 131/0.43 37 .03 July 4 07 24.32 +11 41.3 07 27.10 +11 35.2 3.372 2.399 -0.80 + 4.3 . 20.2 28.6/103 14.1 5.9 145/0.33 93 .61 14 07 43.27 +10 36.8 07 46.02 +10 29.4 3.448 2.461 -0.74 + 4.2 . 20.3 27.7/105 11.7 4.8 165/0.26 145 .89 24 08 01.42 +09 25.7 08 04.14 +09 17.2 3.514 2.523 -0.69 + 4.1 . 20.4 26.8/107 10.9 4.3 191/0.23 18 .01 Aug. 3 08 18.77 +08 09.0 08 21.46 +07 59.4 3.569 2.586 -0.64 + 4.0 . 20.5 25.9/108 12.2 4.7 217/0.25 109 .64 13 08 35.30 +06 47.6 08 37.97 +06 37.0 3.613 2.648 -0.60 + 3.9 . 20.6 25.0/110 15.2 5.8 236/0.30 122 .84 23 08 51.04 +05 22.1 08 53.67 +05 10.6 3.644 2.711 -0.57 + 3.7 . 20.7 24.0/112 19.3 7.1 249/0.37 18 .00 Sept. 2 09 05.94 +03 53.3 09 08.56 +03 41.1 3.663 2.773 -0.53 + 3.5 . 20.8 22.9/114 24.1 8.6 258/0.44 128 .66 12 09 20.00 +02 22.1 09 22.59 +02 09.3 3.669 2.835 -0.51 + 3.3 . 20.9 21.9/115 29.4 10.0 265/0.52 97 .77 22 09 33.19 +00 49.2 09 35.76 +00 35.7 3.661 2.897 -0.48 + 3.2 . 21.0 20.7/117 35.0 11.5 270/0.59 36 .00 Oct. 2 09 45.46 -00 44.7 09 48.01 -00 58.6 3.639 2.958 -0.46 + 3.0 . 21.0 19.3/119 41.0 12.8 274/0.66 148 .70 12 09 56.74 -02 18.6 09 59.28 -02 33.0 3.605 3.019 -0.45 + 2.8 . 21.1 17.9/122 47.3 14.1 277/0.73 69 .69 22 10 06.96 -03 51.8 10 09.49 -04 06.5 3.558 3.080 -0.44 + 2.6 . 21.2 16.3/124 54.0 15.2 280/0.80 58 .00 Nov. 1 10 16.02 -05 23.2 10 18.54 -05 38.2 3.499 3.140 -0.43 + 2.4 . 21.2 14.6/128 61.0 16.0 283/0.85 164 .73 11 10 23.80 -06 51.8 10 26.31 -07 07.1 3.430 3.199 -0.43 + 2.3 . 21.2 12.7/132 68.3 16.7 286/0.91 42 .63 21 10 30.17 -08 16.3 10 32.67 -08 31.8 3.352 3.258 -0.43 + 2.1 . 21.2 10.6/138 76.0 17.1 288/0.95 82 .01 Dec. 1 10 34.97 -09 35.3 10 37.46 -09 50.9 3.268 3.316 -0.43 + 2.0 . 21.2 8.5/148 84.2 17.2 291/0.97 149 .78 11 10 38.05 -10 46.9 10 40.54 -11 02.6 3.182 3.374 -0.45 + 1.8 . 21.2 6.5/164 92.7 17.0 294/0.98 20 .59 21 10 39.28 -11 49.1 10 41.77 -12 04.8 3.095 3.431 -0.46 + 1.8 . 21.1 5.1/192 101.6 16.3 297/0.97 110 .01 31 10 38.57 -12 39.5 10 41.04 -12 55.2 3.014 3.488 -0.48 + 1.7 . 21.1 5.3/227 110.9 15.3 301/0.93 116 .84 2026 Jan. 10 10 35.90 -13 15.6 10 38.37 -13 31.3 2.941 3.544 -0.51 + 1.7 . 21.0 6.8/253 120.5 13.8 306/0.86 30 .56 20 10 31.40 -13 35.2 10 33.87 -13 50.7 2.883 3.599 -0.53 + 1.8 . 20.9 8.8/269 130.3 12.0 313/0.77 141 .01 30 10 25.35 -13 36.4 10 27.80 -13 51.7 2.844 3.653 -0.56 + 1.9 . 20.9 10.6/280 140.0 10.0 322/0.64 77 .89 Feb. 9 10 18.20 -13 18.7 10 20.65 -13 33.8 2.828 3.707 -0.57 + 2.1 . 20.8 11.8/287 148.9 7.9 336/0.51 62 .55 19 10 10.52 -12 43.3 10 12.97 -12 58.1 2.839 3.761 -0.59 + 2.2 . 20.8 12.2/294 155.5 6.3 359/0.40 157 .03 Mar. 1 10 02.97 -11 53.0 10 05.42 -12 07.6 2.879 3.813 -0.59 + 2.4 . 20.9 11.7/301 157.6 5.7 30/0.37 38 .93