491P/Spacewatch-PANSTARRS Orbit by S. Nakano CBET 5431 (2024) Observed in 2nd half of 2024
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2024 Sep. 6.06241 3.7165142 0.2586966 11.2 298.88890 311.68528 9.36604 0.200 2025 May 5.0 m1 = 13.5 + 5 log Delta + 7.5 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 17 53.67 -28 35.3 17 56.84 -28 35.7 4.724 3.750 +1.50 + 0.9 21.2 19.8/ 88 7.2 1.9 225/0.08 52 .23 2025 Jan. 5 18 08.65 -28 27.9 18 11.82 -28 27.1 4.708 3.757 +1.47 + 1.3 21.2 19.5/ 87 12.9 3.4 246/0.14 76 .28 15 18 23.39 -28 16.2 18 26.55 -28 14.4 4.676 3.763 +1.44 + 1.7 21.2 19.1/ 86 19.5 5.0 253/0.20 148 .99 25 18 37.79 -28 00.6 18 40.94 -27 57.8 4.628 3.771 +1.39 + 2.0 21.2 18.6/ 85 26.3 6.6 256/0.27 29 .22 Feb. 4 18 51.73 -27 41.5 18 54.86 -27 37.6 4.565 3.778 +1.34 + 2.3 21.1 17.9/ 83 33.2 8.2 257/0.34 106 .35 14 19 05.10 -27 19.3 19 08.22 -27 14.5 4.486 3.787 +1.27 + 2.5 21.1 17.1/ 82 40.3 9.7 258/0.41 124 .98 24 19 17.80 -26 54.8 19 20.89 -26 49.1 4.395 3.796 +1.19 + 2.7 21.1 16.2/ 81 47.4 11.1 258/0.48 5 .19 Mar. 6 19 29.70 -26 28.6 19 32.77 -26 22.2 4.291 3.805 +1.10 + 2.8 21.0 15.0/ 80 54.7 12.3 258/0.54 136 .42 16 19 40.68 -26 01.7 19 43.73 -25 54.5 4.176 3.815 +0.99 + 2.7 21.0 13.7/ 79 62.2 13.3 258/0.60 99 .97 26 19 50.64 -25 35.0 19 53.67 -25 27.1 4.053 3.825 +0.88 + 2.6 20.9 12.2/ 78 69.8 14.2 257/0.66 23 .16 Apr. 5 19 59.43 -25 09.2 20 02.44 -25 00.8 3.924 3.835 +0.75 + 2.4 20.8 10.5/ 77 77.6 14.8 257/0.71 166 .49 15 20 06.93 -24 45.6 20 09.92 -24 36.7 3.791 3.846 +0.61 + 2.1 20.8 8.5/ 76 85.6 15.1 257/0.75 73 .96 25 20 13.00 -24 24.7 20 15.98 -24 15.5 3.656 3.858 +0.45 + 1.7 20.7 6.4/ 74 93.9 15.1 257/0.77 54 .11 May 5 20 17.50 -24 07.5 20 20.47 -23 58.0 3.523 3.870 +0.28 + 1.3 20.6 4.1/ 71 102.6 14.7 258/0.78 162 .54 15 20 20.32 -23 54.6 20 23.28 -23 44.9 3.396 3.882 +0.10 + 0.9 20.6 1.7/ 59 111.5 14.0 258/0.77 43 .95 25 20 21.37 -23 46.0 20 24.33 -23 36.3 3.277 3.895 -0.08 + 0.4 20.5 1.1/291 120.9 12.9 259/0.74 91 .07 June 4 20 20.60 -23 41.8 20 23.56 -23 32.1 3.172 3.908 -0.25 0.0 20.4 3.5/270 130.6 11.4 260/0.67 130 .58 14 20 18.08 -23 41.3 20 21.04 -23 31.8 3.083 3.922 -0.41 - 0.2 20.4 5.7/267 140.7 9.5 262/0.57 8 .93 24 20 13.96 -23 43.4 20 16.92 -23 34.1 3.015 3.936 -0.54 - 0.4 20.4 7.5/267 151.1 7.2 264/0.45 132 .03 July 4 20 08.53 -23 46.7 20 11.51 -23 37.7 2.972 3.950 -0.63 - 0.3 20.3 8.6/268 161.7 4.6 268/0.29 95 .61 14 20 02.26 -23 49.4 20 05.24 -23 40.8 2.955 3.964 -0.66 - 0.1 20.3 9.1/269 172.3 2.0 283/0.13 31 .89 24 19 55.65 -23 50.2 19 58.64 -23 42.0 2.966 3.979 -0.63 + 0.2 20.4 8.7/271 175.0 1.3 42/0.08 174 .01 Aug. 3 19 49.30 -23 47.8 19 52.29 -23 40.0 3.007 3.995 -0.55 + 0.6 20.4 7.6/274 164.7 3.8 69/0.24 59 .64 13 19 43.75 -23 41.7 19 46.75 -23 34.3 3.075 4.010 -0.43 + 0.9 20.5 6.0/279 154.1 6.3 75/0.39 73 .84 23 19 39.43 -23 32.0 19 42.43 -23 24.9 3.168 4.026 -0.28 + 1.3 20.5 4.0/289 143.5 8.6 77/0.51 147 .00 Sept. 2 19 36.65 -23 18.7 19 39.65 -23 11.8 3.283 4.042 -0.11 + 1.6 20.6 2.2/317 133.3 10.5 79/0.60 24 .66 12 19 35.57 -23 02.4 19 38.57 -22 55.5 3.416 4.059 +0.06 + 1.9 20.7 2.1/ 25 123.4 11.9 80/0.66 114 .77 22 19 36.22 -22 43.2 19 39.21 -22 36.3 3.564 4.076 +0.23 + 2.2 20.8 3.9/ 56 113.9 13.0 80/0.69 112 .00 Oct. 2 19 38.55 -22 21.4 19 41.53 -22 14.3 3.723 4.093 +0.39 + 2.5 20.9 5.9/ 66 104.7 13.7 80/0.69 9 .70 12 19 42.43 -21 57.0 19 45.40 -21 49.6 3.888 4.110 +0.53 + 2.7 21.1 7.8/ 70 95.8 14.0 80/0.68 151 .69 22 19 47.71 -21 29.8 19 50.66 -21 22.1 4.056 4.127 +0.65 + 3.0 21.2 9.6/ 72 87.1 13.9 79/0.65 82 .00 Nov. 1 19 54.22 -20 59.7 19 57.15 -20 51.7 4.223 4.145 +0.75 + 3.4 21.3 11.1/ 73 78.7 13.6 79/0.61 39 .73 11 20 01.78 -20 26.6 20 04.70 -20 18.0 4.387 4.163 +0.84 + 3.7 21.4 12.4/ 73 70.6 13.0 78/0.56 174 .63 21 20 10.22 -19 50.2 20 13.12 -19 41.1 4.544 4.181 +0.92 + 4.0 21.4 13.6/ 73 62.5 12.1 77/0.51 55 .01 Dec. 1 20 19.39 -19 10.3 20 22.27 -19 00.7 4.692 4.200 +0.97 + 4.4 21.5 14.5/ 73 54.7 11.0 76/0.45 70 .78 11 20 29.14 -18 27.1 20 31.99 -18 16.9 4.829 4.218 +1.02 + 4.7 21.6 15.3/ 72 47.0 9.8 75/0.39 147 .59 21 20 39.33 -17 40.3 20 42.16 -17 29.6 4.952 4.237 +1.05 + 5.1 21.7 15.9/ 72 39.3 8.5 74/0.33 29 .01 31 20 49.83 -16 50.3 20 52.64 -16 38.9 5.060 4.256 +1.07 + 5.4 21.7 16.3/ 71 31.8 7.0 73/0.27 100 .84 2026 Jan. 10 21 00.54 -15 57.1 21 03.32 -15 45.2 5.152 4.275 +1.08 + 5.7 21.8 16.6/ 70 24.3 5.4 71/0.20 122 .56 20 21 11.35 -15 01.0 21 14.11 -14 48.5 5.226 4.294 +1.08 + 5.9 21.8 16.8/ 70 16.9 3.8 69/0.14 5 .01 30 21 22.17 -14 02.3 21 24.90 -13 49.4 5.282 4.314 +1.07 + 6.1 21.9 16.8/ 69 9.6 2.2 64/0.08 131 .89 Feb. 9 21 32.90 -13 01.6 21 35.61 -12 48.1 5.318 4.333 +1.06 + 6.3 21.9 16.7/ 68 2.6 0.6 40/0.02 98 .55 19 21 43.48 -11 59.0 21 46.17 -11 45.2 5.336 4.353 +1.03 + 6.4 21.9 16.5/ 67 5.4 1.2 269/0.04 24 .03 Mar. 1 21 53.82 -10 55.3 21 56.49 -10 41.1 5.334 4.373 +1.00 + 6.5 21.9 16.1/ 67 12.6 2.8 258/0.10 161 .93