C/2025 R2 (SWAN) Orbit by S. Nakano NK 5550 (2026) Observed in 1st half of 2026
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2025 Sep. 12.82826 0.5042014 0.9941031 791 308.36640 335.32013 4.47283 0.200 2026 June 9.0 m1 = 9.0 + 5 log Delta + 10.0 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 00 55.90 +11 34.0 00 58.52 +11 50.2 1.727 2.114 +1.42 + 6.5 13.4 21.8/ 72 98.8 27.4 68/2.76 33 .84 2026 Jan. 10 01 10.08 +12 39.3 01 12.72 +12 55.2 1.993 2.258 +1.36 + 6.3 14.0 20.9/ 72 92.3 25.8 68/2.29 170 .56 20 01 23.70 +13 42.7 01 26.36 +13 58.3 2.263 2.397 +1.33 + 6.2 14.6 20.3/ 72 85.6 24.2 68/1.92 72 .01 30 01 36.96 +14 44.8 01 39.65 +15 00.0 2.534 2.534 +1.30 + 6.0 15.1 19.8/ 72 78.8 22.4 68/1.61 62 .89 Feb. 9 01 49.98 +15 45.4 01 52.69 +16 00.2 2.803 2.669 +1.29 + 5.9 15.5 19.4/ 72 72.0 20.6 68/1.35 168 .55 19 02 02.81 +16 44.4 02 05.55 +16 58.7 3.068 2.800 +1.27 + 5.7 15.9 19.1/ 72 65.2 18.7 68/1.13 47 .03 Mar. 1 02 15.50 +17 41.5 02 18.27 +17 55.3 3.326 2.929 +1.26 + 5.4 16.3 18.7/ 73 58.3 16.7 68/0.94 90 .93 11 02 28.05 +18 36.4 02 30.84 +18 49.7 3.575 3.056 +1.24 + 5.2 16.6 18.3/ 73 51.4 14.7 69/0.77 146 .54 21 02 40.44 +19 28.9 02 43.26 +19 41.6 3.813 3.181 +1.23 + 4.9 16.9 18.0/ 74 44.5 12.7 69/0.63 19 .05 31 02 52.68 +20 18.8 02 55.53 +20 30.9 4.038 3.304 +1.21 + 4.6 17.2 17.5/ 74 37.7 10.6 69/0.50 118 .95 Apr. 10 03 04.73 +21 05.9 03 07.60 +21 17.4 4.247 3.425 +1.19 + 4.3 17.5 17.1/ 75 30.8 8.6 68/0.39 123 .52 20 03 16.56 +21 50.0 03 19.46 +22 00.8 4.439 3.544 +1.16 + 4.0 17.7 16.6/ 75 23.9 6.6 67/0.28 11 .09 30 03 28.13 +22 31.0 03 31.06 +22 41.2 4.612 3.661 +1.13 + 3.7 18.0 16.0/ 76 17.0 4.6 64/0.19 144 .97 May 10 03 39.40 +23 08.9 03 42.35 +23 18.5 4.766 3.777 +1.10 + 3.4 18.2 15.4/ 77 10.3 2.7 57/0.11 98 .49 20 03 50.33 +23 43.8 03 53.31 +23 52.6 4.899 3.891 +1.05 + 3.1 18.4 14.8/ 77 4.4 1.1 24/0.04 42 .15 30 04 00.85 +24 15.6 04 03.86 +24 23.8 5.011 4.004 +1.01 + 2.8 18.5 14.0/ 78 5.8 1.5 297/0.06 170 .98 June 9 04 10.92 +24 44.4 04 13.94 +24 51.9 5.102 4.116 +0.96 + 2.5 18.7 13.2/ 78 12.3 3.0 277/0.11 71 .44 19 04 20.45 +25 10.4 04 23.49 +25 17.4 5.170 4.226 +0.89 + 2.3 18.8 12.3/ 79 19.5 4.6 271/0.17 73 .20 29 04 29.37 +25 33.8 04 32.43 +25 40.2 5.217 4.335 +0.83 + 2.0 19.0 11.3/ 79 26.8 6.1 269/0.22 164 .99 July 9 04 37.61 +25 54.9 04 40.68 +26 00.6 5.244 4.442 +0.75 + 1.8 19.1 10.2/ 79 34.4 7.4 268/0.27 40 .37 19 04 45.07 +26 13.7 04 48.15 +26 19.0 5.250 4.549 +0.66 + 1.6 19.2 9.0/ 79 42.2 8.6 267/0.32 103 .26 29 04 51.64 +26 30.6 04 54.74 +26 35.4 5.238 4.654 +0.56 + 1.5 19.3 7.6/ 79 50.3 9.7 267/0.35 137 1.00 Aug. 8 04 57.23 +26 45.8 05 00.33 +26 50.2 5.209 4.759 +0.45 + 1.3 19.4 6.2/ 77 58.5 10.5 267/0.39 6 .29 18 05 01.71 +26 59.5 05 04.82 +27 03.6 5.166 4.862 +0.33 + 1.2 19.4 4.5/ 74 67.1 11.1 266/0.41 133 .30 28 05 04.97 +27 11.8 05 08.09 +27 15.7 5.112 4.964 +0.19 + 1.1 19.5 2.8/ 67 75.9 11.4 266/0.43 106 1.00 Sept. 7 05 06.90 +27 22.8 05 10.02 +27 26.5 5.050 5.066 +0.05 + 0.9 19.6 1.2/ 35 85.2 11.4 265/0.43 31 .21 17 05 07.40 +27 32.3 05 10.53 +27 36.0 4.985 5.166 -0.10 + 0.8 19.6 1.5/301 94.7 11.2 265/0.43 164 .33 27 05 06.40 +27 40.1 05 09.53 +27 43.9 4.921 5.266 -0.25 + 0.6 19.7 3.4/280 104.7 10.6 264/0.41 71 1.00 Oct. 7 05 03.89 +27 45.7 05 07.02 +27 49.6 4.865 5.364 -0.40 + 0.3 19.7 5.3/274 115.0 9.7 262/0.38 70 .15 17 04 59.89 +27 48.5 05 03.03 +27 52.7 4.820 5.462 -0.53 0.0 19.8 7.1/270 125.7 8.5 261/0.34 162 .34 27 04 54.57 +27 47.9 04 57.69 +27 52.5 4.793 5.559 -0.64 - 0.4 19.9 8.5/268 136.8 7.0 258/0.28 32 .99 Nov. 6 04 48.13 +27 43.3 04 51.26 +27 48.3 4.790 5.655 -0.72 - 0.8 19.9 9.6/265 148.0 5.3 255/0.21 110 .11 16 04 40.92 +27 34.4 04 44.03 +27 40.0 4.814 5.751 -0.76 - 1.2 20.0 10.2/263 159.4 3.5 248/0.14 126 .36 26 04 33.34 +27 21.4 04 36.44 +27 27.5 4.870 5.845 -0.75 - 1.6 20.1 10.2/261 170.3 1.6 229/0.06 11 .97 Dec. 6 04 25.81 +27 05.0 04 28.90 +27 11.6 4.959 5.939 -0.71 - 1.8 20.2 9.6/259 173.5 1.1 137/0.04 150 .09 16 04 18.75 +26 46.2 04 21.83 +26 53.2 5.082 6.033 -0.62 - 1.9 20.3 8.6/257 163.6 2.6 99/0.10 89 .38 26 04 12.52 +26 26.4 04 15.58 +26 33.8 5.237 6.125 -0.52 - 1.9 20.5 7.2/255 152.4 4.3 90/0.16 55 .94 2027 Jan. 5 04 07.38 +26 07.1 04 10.42 +26 14.8 5.420 6.217 -0.39 - 1.7 20.6 5.6/252 141.2 5.7 86/0.20 172 .07 15 04 03.47 +25 49.5 04 06.51 +25 57.5 5.629 6.309 -0.26 - 1.5 20.8 3.8/247 130.2 6.8 83/0.23 51 .41 25 04 00.88 +25 34.6 04 03.90 +25 42.8 5.857 6.399 -0.13 - 1.2 20.9 2.1/237 119.5 7.7 82/0.25 95 .91 Feb. 4 03 59.57 +25 23.0 04 02.59 +25 31.3 6.101 6.489 -0.01 - 0.8 21.0 0.8/187 109.0 8.3 80/0.26 138 .06 14 03 59.50 +25 15.0 04 02.52 +25 23.3 6.353 6.579 +0.11 - 0.5 21.2 1.5/108 98.9 8.5 79/0.26 13 .46 24 04 00.56 +25 10.5 04 03.58 +25 18.7 6.610 6.668 +0.21 - 0.1 21.3 2.8/ 93 89.1 8.5 79/0.25 131 .88 Mar. 6 04 02.61 +25 09.2 04 05.64 +25 17.3 6.866 6.756 +0.29 + 0.1 21.5 4.0/ 88 79.5 8.3 78/0.23 106 .05