487P/Siding Spring Orbit by S. Nakano CBET 5422 (2024) Observed in 1st half of 2025
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2024 Oct. 20.60657 1.8147927 0.6485108 11.7 0.84695 49.20591 39.36601 0.200 2025 May 5.0 m1 = 12.0 + 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 , ¡ ¡ ¡ ¡ ¡ ¡ 2024 Dec. 26 02 43.93 +54 17.2 02 47.52 +54 29.7 1.151 1.937 -0.66 + 6.5 15.2 8.6/319 130.1 22.8 107/3.33 142 .23 2025 Jan. 5 02 37.29 +55 21.5 02 40.89 +55 34.3 1.266 1.974 +0.09 + 4.7 15.5 4.7/ 10 122.2 24.9 97/3.33 74 .28 15 02 38.20 +56 08.2 02 41.83 +56 21.0 1.390 2.015 +0.75 + 3.9 15.8 7.3/ 57 115.1 26.2 89/3.22 72 .99 25 02 45.67 +56 47.4 02 49.38 +56 59.9 1.522 2.060 +1.31 + 3.5 16.0 11.2/ 70 108.6 26.9 83/3.05 145 .22 Feb. 4 02 58.71 +57 23.3 03 02.52 +57 35.1 1.658 2.107 +1.78 + 3.2 16.3 14.6/ 75 102.7 27.2 79/2.85 47 .35 14 03 16.40 +57 56.7 03 20.32 +58 07.5 1.797 2.158 +2.17 + 2.8 16.6 17.3/ 78 97.3 27.0 77/2.63 95 .98 24 03 37.92 +58 25.8 03 41.97 +58 35.3 1.939 2.211 +2.48 + 2.1 16.9 19.4/ 81 92.2 26.6 75/2.42 134 .19 Mar. 6 04 02.61 +58 48.0 04 06.79 +58 56.1 2.082 2.266 +2.73 + 1.1 17.1 21.1/ 84 87.4 25.9 74/2.22 33 .42 16 04 29.79 +59 00.9 04 34.07 +59 07.1 2.225 2.323 +2.90 - 0.1 17.4 22.4/ 87 82.9 25.1 74/2.02 113 .97 26 04 58.75 +59 01.7 05 03.11 +59 05.9 2.369 2.381 +3.01 - 1.5 17.6 23.3/ 90 78.6 24.2 75/1.84 118 .16 Apr. 5 05 28.85 +58 48.6 05 33.23 +58 50.7 2.513 2.441 +3.05 - 3.0 17.9 24.0/ 94 74.3 23.2 75/1.68 35 .49 15 05 59.38 +58 20.8 06 03.74 +58 20.7 2.656 2.502 +3.03 - 4.5 18.1 24.5/ 97 70.3 22.2 76/1.52 129 .96 25 06 29.72 +57 38.0 06 34.03 +57 35.7 2.798 2.564 +2.96 - 5.9 18.3 24.8/101 66.3 21.0 77/1.38 99 .11 May 5 06 59.41 +56 40.9 07 03.60 +56 36.5 2.939 2.627 +2.85 - 7.2 18.5 24.9/104 62.3 19.9 77/1.25 47 .54 15 07 28.03 +55 31.0 07 32.09 +55 24.6 3.077 2.690 +2.72 - 8.3 18.7 24.9/107 58.5 18.7 77/1.12 143 .95 25 07 55.36 +54 09.9 07 59.26 +54 01.8 3.213 2.754 +2.58 - 9.2 18.9 24.9/109 54.7 17.5 77/1.01 77 .07 June 4 08 21.28 +52 39.7 08 25.03 +52 29.9 3.345 2.818 +2.43 - 9.9 19.1 24.7/111 50.9 16.2 75/0.91 63 .58 14 08 45.76 +51 02.4 08 49.35 +50 51.3 3.472 2.882 +2.29 -10.4 19.3 24.4/113 47.3 15.0 74/0.81 152 .93 24 09 08.84 +49 20.0 09 12.28 +49 07.7 3.595 2.947 +2.16 -10.7 19.5 24.1/114 43.8 13.8 71/0.72 55 .03 July 4 09 30.61 +47 34.3 09 33.90 +47 21.0 3.711 3.011 +2.04 -10.8 19.6 23.7/115 40.5 12.7 67/0.64 79 .61 14 09 51.15 +45 47.1 09 54.32 +45 32.9 3.821 3.075 +1.93 -10.8 19.8 23.3/116 37.4 11.6 62/0.57 147 .89 24 10 10.58 +43 59.7 10 13.63 +43 44.8 3.922 3.140 +1.83 -10.7 19.9 22.8/116 34.6 10.6 56/0.51 37 .01 Aug. 3 10 29.01 +42 13.7 10 31.95 +41 58.2 4.015 3.204 +1.74 -10.4 20.1 22.2/116 32.4 9.8 49/0.46 96 .64 13 10 46.50 +40 30.2 10 49.36 +40 14.3 4.097 3.268 +1.66 -10.0 20.2 21.7/116 30.8 9.1 40/0.42 130 .84 23 11 03.16 +38 50.3 11 05.94 +38 34.1 4.169 3.332 +1.58 - 9.5 20.3 21.0/116 30.0 8.7 30/0.40 28 .00 Sept. 2 11 19.06 +37 15.2 11 21.76 +36 58.8 4.229 3.395 +1.51 - 9.0 20.4 20.3/115 30.2 8.6 19/0.39 113 .66 12 11 34.22 +35 45.9 11 36.87 +35 29.3 4.277 3.459 +1.44 - 8.3 20.5 19.6/114 31.4 8.7 8/0.39 107 .77 22 11 48.70 +34 23.1 11 51.29 +34 06.4 4.313 3.522 +1.38 - 7.5 20.6 18.8/113 33.7 9.1 358/0.40 36 .00 Oct. 2 12 02.50 +33 08.1 12 05.06 +32 51.4 4.334 3.584 +1.31 - 6.6 20.7 17.9/111 36.9 9.6 349/0.42 130 .70 12 12 15.64 +32 01.5 12 18.15 +31 44.9 4.343 3.646 +1.24 - 5.7 20.8 16.9/109 40.8 10.3 341/0.45 83 .69 22 12 28.08 +31 04.4 12 30.56 +30 47.8 4.337 3.708 +1.17 - 4.7 20.9 15.8/106 45.5 11.0 334/0.48 52 .00 Nov. 1 12 39.80 +30 17.6 12 42.25 +30 01.2 4.319 3.769 +1.09 - 3.5 20.9 14.6/103 50.7 11.8 327/0.52 144 .73 11 12 50.73 +29 42.0 12 53.15 +29 25.7 4.288 3.830 +1.00 - 2.4 21.0 13.4/100 56.4 12.4 322/0.55 60 .63 21 13 00.80 +29 18.3 13 03.19 +29 02.2 4.246 3.891 +0.91 - 1.1 21.0 12.0/ 95 62.6 13.0 317/0.58 72 .01 Dec. 1 13 09.89 +29 07.2 13 12.27 +28 51.3 4.193 3.951 +0.80 + 0.2 21.1 10.5/ 88 69.1 13.5 312/0.61 143 .78 11 13 17.90 +29 09.1 13 20.25 +28 53.3 4.132 4.010 +0.68 + 1.5 21.1 9.0/ 80 76.0 13.8 307/0.63 42 .59 21 13 24.67 +29 24.2 13 27.01 +29 08.6 4.066 4.069 +0.53 + 2.8 21.1 7.5/ 68 83.3 13.9 302/0.64 94 .01 31 13 30.04 +29 52.3 13 32.36 +29 36.9 3.997 4.128 +0.38 + 4.0 21.2 6.4/ 50 90.7 13.8 296/0.65 123 .84 2026 Jan. 10 13 33.84 +30 32.4 13 36.14 +30 17.2 3.928 4.186 +0.20 + 5.1 21.2 5.7/ 27 98.4 13.4 291/0.64 40 .56 20 13 35.90 +31 23.2 13 38.18 +31 08.0 3.863 4.244 +0.02 + 5.9 21.2 5.9/ 2 106.2 12.9 284/0.63 118 .01 30 13 36.06 +32 22.0 13 38.33 +32 06.7 3.806 4.301 -0.18 + 6.3 21.2 6.7/340 114.0 12.1 277/0.60 93 .89 Feb. 9 13 34.25 +33 25.2 13 36.52 +33 09.9 3.761 4.358 -0.38 + 6.3 21.3 7.9/323 121.5 11.1 268/0.56 56 .55 19 13 30.45 +34 28.6 13 32.72 +34 13.2 3.732 4.414 -0.57 + 5.8 21.3 9.1/310 128.4 10.1 257/0.51 136 .03 Mar. 1 13 24.79 +35 26.9 13 27.06 +35 11.4 3.722 4.470 -0.72 + 4.8 21.4 10.0/299 134.2 9.1 243/0.46 62 .93