131P/Mueller Orbit by S. Nakano NK 3184 (2016) : T is corrected by +0.01 day.
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2026 Feb. 15.74437 2.4078250 0.3446112 7.04 179.28041 214.13231 7.36221 0.200 2026 June 9.0 m1 = 8.0 + 5 log Delta + 21.0 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 , ¡ ¡ ¡ ¡ ¡ ¡ 2025 Dec. 31 23 39.96 -00 07.6 23 42.52 +00 09.0 2.453 2.427 +1.44 + 6.5 18.0 22.5/ 73 76.9 23.2 66/1.71 55 .84 2026 Jan. 10 23 54.35 +00 56.9 23 56.91 +01 13.6 2.565 2.420 +1.53 + 7.3 18.1 24.1/ 72 70.4 22.5 66/1.60 168 .56 20 00 09.67 +02 09.9 00 12.23 +02 26.6 2.674 2.414 +1.61 + 8.0 18.2 25.4/ 72 64.2 21.5 66/1.47 51 .01 30 00 25.78 +03 29.5 00 28.35 +03 46.1 2.778 2.410 +1.68 + 8.4 18.2 26.5/ 71 58.3 20.3 66/1.34 82 .89 Feb. 9 00 42.55 +04 54.0 00 45.13 +05 10.4 2.878 2.408 +1.74 + 8.7 18.3 27.3/ 71 52.5 19.0 67/1.21 148 .55 19 00 59.90 +06 21.7 01 02.50 +06 37.8 2.972 2.408 +1.79 + 8.9 18.4 28.0/ 71 47.0 17.5 68/1.09 28 .03 Mar. 1 01 17.76 +07 50.9 01 20.37 +08 06.6 3.059 2.409 +1.83 + 8.9 18.4 28.5/ 72 41.6 15.8 68/0.96 107 .93 11 01 36.05 +09 19.9 01 38.68 +09 35.1 3.140 2.413 +1.87 + 8.7 18.5 28.9/ 72 36.3 14.1 70/0.84 130 .54 21 01 54.73 +10 47.4 01 57.39 +11 02.0 3.214 2.417 +1.91 + 8.4 18.6 29.2/ 73 31.2 12.3 71/0.72 7 .05 31 02 13.75 +12 11.8 02 16.45 +12 25.6 3.281 2.424 +1.93 + 7.9 18.7 29.4/ 74 26.1 10.5 73/0.60 129 .95 Apr. 10 02 33.07 +13 31.7 02 35.80 +13 44.8 3.339 2.432 +1.96 + 7.3 18.7 29.4/ 75 21.2 8.6 76/0.48 113 .52 20 02 52.64 +14 46.1 02 55.41 +14 58.3 3.390 2.442 +1.98 + 6.7 18.8 29.4/ 76 16.3 6.6 79/0.37 20 .09 30 03 12.41 +15 53.8 03 15.21 +16 04.9 3.432 2.454 +1.99 + 5.9 18.9 29.3/ 78 11.6 4.7 84/0.26 149 .97 May 10 03 32.32 +16 53.9 03 35.16 +17 03.9 3.467 2.467 +2.00 + 5.0 18.9 29.1/ 79 6.9 2.8 94/0.15 95 .49 20 03 52.32 +17 45.6 03 55.18 +17 54.3 3.492 2.482 +2.00 + 4.1 19.0 28.8/ 81 3.0 1.2 131/0.07 43 .15 30 04 12.32 +18 28.1 04 15.21 +18 35.6 3.508 2.498 +2.00 + 3.2 19.1 28.5/ 83 4.0 1.6 219/0.09 166 .98 June 9 04 32.24 +19 01.2 04 35.16 +19 07.3 3.516 2.516 +1.98 + 2.2 19.1 28.1/ 85 8.3 3.4 242/0.18 75 .44 19 04 52.02 +19 24.4 04 54.96 +19 29.2 3.514 2.535 +1.95 + 1.2 19.2 27.6/ 87 13.1 5.2 250/0.28 67 .20 29 05 11.55 +19 37.7 05 14.50 +19 41.1 3.503 2.555 +1.92 + 0.2 19.3 27.1/ 89 18.0 7.0 255/0.38 170 .99 July 9 05 30.73 +19 41.3 05 33.69 +19 43.3 3.482 2.576 +1.87 - 0.7 19.3 26.5/ 91 22.9 8.8 259/0.48 53 .37 19 05 49.47 +19 35.3 05 52.43 +19 36.0 3.451 2.599 +1.82 - 1.6 19.4 25.8/ 93 28.0 10.6 262/0.58 89 .26 29 06 07.66 +19 20.3 06 10.61 +19 19.6 3.411 2.622 +1.75 - 2.5 19.5 25.0/ 95 33.3 12.3 265/0.67 153 1.00 Aug. 8 06 25.20 +18 56.8 06 28.14 +18 54.8 3.362 2.647 +1.68 - 3.2 19.5 24.0/ 97 38.7 13.8 267/0.77 28 .29 18 06 41.98 +18 25.5 06 44.91 +18 22.4 3.303 2.673 +1.59 - 3.9 19.6 23.0/ 99 44.2 15.3 270/0.87 110 .30 28 06 57.88 +17 47.5 07 00.79 +17 43.2 3.235 2.699 +1.49 - 4.5 19.6 21.8/101 50.0 16.7 272/0.96 132 1.00 Sept. 7 07 12.80 +17 03.7 07 15.68 +16 58.4 3.158 2.726 +1.38 - 4.9 19.6 20.4/103 56.1 17.9 274/1.05 9 .21 17 07 26.60 +16 15.4 07 29.46 +16 09.1 3.073 2.754 +1.25 - 5.2 19.7 18.8/106 62.4 18.9 276/1.14 131 .33 27 07 39.13 +15 23.7 07 41.97 +15 16.6 2.980 2.783 +1.11 - 5.4 19.7 17.0/108 69.0 19.6 278/1.22 108 1.00 Oct. 7 07 50.25 +14 30.1 07 53.07 +14 22.3 2.882 2.812 +0.95 - 5.4 19.7 14.9/111 76.0 20.2 279/1.29 31 .15 17 07 59.79 +13 36.3 08 02.58 +13 27.8 2.779 2.842 +0.77 - 5.3 19.7 12.5/115 83.4 20.4 281/1.35 153 .34 27 08 07.54 +12 43.8 08 10.32 +12 34.9 2.674 2.873 +0.58 - 5.0 19.8 9.8/120 91.2 20.2 283/1.39 78 .99 Nov. 6 08 13.34 +11 54.6 08 16.09 +11 45.3 2.569 2.903 +0.36 - 4.4 19.8 6.9/130 99.6 19.7 284/1.40 61 .11 16 08 16.96 +11 10.5 08 19.70 +11 01.1 2.468 2.935 +0.13 - 3.7 19.8 4.2/153 108.5 18.6 286/1.38 170 .36 26 08 18.27 +10 33.7 08 21.00 +10 24.1 2.373 2.966 -0.11 - 2.8 19.8 3.2/210 117.9 17.1 288/1.32 44 .97 Dec. 6 08 17.19 +10 05.8 08 19.91 +09 56.3 2.289 2.998 -0.34 - 1.7 19.8 5.4/251 128.0 15.0 291/1.20 94 .09 16 08 13.76 +09 48.5 08 16.48 +09 39.2 2.222 3.030 -0.55 - 0.5 19.8 8.1/266 138.5 12.4 294/1.02 144 .38 26 08 08.26 +09 42.7 08 10.98 +09 33.7 2.175 3.063 -0.71 + 0.6 19.9 10.5/273 149.4 9.4 300/0.79 12 .94 2027 Jan. 5 08 01.18 +09 48.2 08 03.91 +09 39.7 2.153 3.095 -0.79 + 1.6 20.0 11.8/278 160.1 6.2 312/0.53 130 .07 15 07 53.23 +10 04.1 07 55.97 +09 56.0 2.158 3.128 -0.79 + 2.4 20.1 12.0/282 168.3 3.6 345/0.31 106 .41 25 07 45.28 +10 28.0 07 48.02 +10 20.5 2.194 3.161 -0.71 + 3.0 20.2 10.9/286 167.1 4.0 45/0.33 42 .91 Feb. 4 07 38.13 +10 57.2 07 40.89 +10 50.2 2.258 3.194 -0.56 + 3.2 20.4 8.9/291 158.1 6.6 72/0.53 164 .06 14 07 32.48 +11 28.9 07 35.25 +11 22.3 2.350 3.227 -0.37 + 3.2 20.5 6.3/300 147.6 9.4 83/0.73 65 .46 24 07 28.77 +12 00.4 07 31.55 +11 54.0 2.465 3.260 -0.16 + 2.9 20.7 3.7/322 137.0 11.9 88/0.88 82 .88 Mar. 6 07 27.21 +12 29.6 07 30.00 +12 23.3 2.601 3.293 +0.06 + 2.5 20.9 2.7/ 19 126.9 13.9 92/0.98 153 .05