172P/Yeung Orbit by T. Kobayashi NK 4990 (2022) Observed in 1st half of 2024

Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) Epoch 2025 Nov. 3.38675 3.3571957 0.2045079 8.67 209.04621 30.87746 11.22516 0.200 2024 Mar. 31.0 m1 = 10.5 + 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 , ¡ ¡ ¡ ¡ ¡ ¡ 2023 Dec. 22 10 29.08 +22 44.3 10 31.82 +22 28.9 3.663 4.210 -0.02 + 2.5 19.6 2.5/353 117.6 12.0 286/0.62 122 .74 2024 Jan. 1 10 28.85 +23 09.6 10 31.59 +22 54.1 3.520 4.192 -0.20 + 3.2 19.5 4.2/320 127.6 10.7 282/0.57 10 .78 11 10 26.88 +23 41.9 10 29.63 +23 26.5 3.394 4.175 -0.37 + 3.7 19.4 6.2/307 137.8 9.1 277/0.50 133 .01 21 10 23.21 +24 18.9 10 25.98 +24 03.7 3.290 4.158 -0.51 + 3.9 19.3 8.0/299 148.1 7.2 270/0.41 84 .79 31 10 18.05 +24 57.4 10 20.83 +24 42.3 3.211 4.141 -0.63 + 3.6 19.2 9.3/293 157.9 5.1 256/0.30 41 .77 Feb. 10 10 11.75 +25 33.7 10 14.55 +25 18.7 3.161 4.123 -0.69 + 3.0 19.2 9.9/288 165.3 3.5 226/0.21 169 .00 20 10 04.80 +26 03.7 10 07.62 +25 49.1 3.141 4.106 -0.70 + 2.1 19.1 9.6/283 165.5 3.5 177/0.21 44 .82 Mar. 1 09 57.81 +26 24.5 10 00.65 +26 10.1 3.151 4.088 -0.64 + 1.0 19.1 8.7/277 158.3 5.1 147/0.31 78 .75 11 09 51.38 +26 34.0 09 54.24 +26 19.8 3.190 4.071 -0.53 - 0.2 19.1 7.2/268 148.6 7.3 132/0.43 141 .01 21 09 46.05 +26 31.4 09 48.92 +26 17.4 3.254 4.053 -0.38 - 1.4 19.1 5.4/255 138.4 9.4 124/0.54 10 .84 31 09 42.21 +26 17.1 09 45.08 +26 03.3 3.339 4.036 -0.21 - 2.5 19.2 3.8/230 128.3 11.2 119/0.63 115 .72 Apr. 10 09 40.06 +25 52.3 09 42.93 +25 38.6 3.442 4.018 -0.04 - 3.4 19.2 3.4/188 118.5 12.7 116/0.69 101 .02 20 09 39.71 +25 18.3 09 42.57 +25 04.6 3.557 4.001 +0.14 - 4.2 19.3 4.6/156 109.1 13.7 113/0.72 28 .86 30 09 41.09 +24 36.6 09 43.94 +24 22.8 3.681 3.983 +0.30 - 4.8 19.3 6.3/140 100.1 14.4 111/0.74 151 .66 May 10 09 44.09 +23 48.3 09 46.92 +23 34.4 3.809 3.966 +0.44 - 5.4 19.4 8.2/131 91.5 14.7 110/0.73 66 .05 20 09 48.56 +22 54.3 09 51.37 +22 40.2 3.938 3.949 +0.57 - 5.9 19.4 9.9/126 83.2 14.7 109/0.71 57 .88 30 09 54.30 +21 55.5 09 57.10 +21 41.2 4.064 3.931 +0.68 - 6.3 19.5 11.5/123 75.3 14.4 108/0.67 173 .58 June 9 10 01.16 +20 52.4 10 03.93 +20 37.9 4.185 3.914 +0.78 - 6.7 19.5 12.9/121 67.7 13.9 107/0.63 36 .07 19 10 08.96 +19 45.5 10 11.71 +19 30.7 4.298 3.897 +0.86 - 7.1 19.6 14.1/120 60.3 13.1 106/0.58 84 .90 29 10 17.56 +18 35.2 10 20.28 +18 20.1 4.402 3.879 +0.92 - 7.4 19.6 15.1/119 53.2 12.1 106/0.52 141 .49 July 9 10 26.82 +17 21.8 10 29.52 +17 06.4 4.495 3.862 +0.98 - 7.6 19.6 16.0/118 46.2 11.0 105/0.46 11 .09 19 10 36.63 +16 05.6 10 39.31 +15 50.0 4.576 3.845 +1.02 - 7.9 19.7 16.8/118 39.4 9.7 104/0.40 110 .92 29 10 46.89 +14 47.1 10 49.55 +14 31.2 4.643 3.829 +1.06 - 8.1 19.7 17.4/117 32.8 8.3 102/0.34 110 .40 Aug. 8 10 57.53 +13 26.4 11 00.16 +13 10.3 4.695 3.812 +1.09 - 8.3 19.7 18.0/117 26.2 6.8 100/0.27 15 .11 18 11 08.44 +12 04.0 11 11.06 +11 47.7 4.732 3.795 +1.11 - 8.4 19.7 18.4/117 19.8 5.2 96/0.21 137 .95 28 11 19.59 +10 40.3 11 22.18 +10 23.8 4.753 3.779 +1.13 - 8.5 19.7 18.7/117 13.7 3.6 88/0.15 82 .33 Sept. 7 11 30.90 +09 15.6 11 33.48 +08 59.0 4.757 3.762 +1.14 - 8.5 19.6 19.0/116 8.1 2.2 69/0.09 37 .13 17 11 42.32 +07 50.5 11 44.89 +07 33.9 4.745 3.746 +1.15 - 8.5 19.6 19.1/116 5.5 1.5 15/0.06 165 .98 27 11 53.79 +06 25.5 11 56.35 +06 08.8 4.717 3.730 +1.15 - 8.5 19.6 19.1/116 9.0 2.4 329/0.10 56 .28 Oct. 7 12 05.27 +05 00.9 12 07.83 +04 44.2 4.671 3.714 +1.14 - 8.3 19.5 19.0/116 14.9 4.0 313/0.16 61 .15 17 12 16.69 +03 37.5 12 19.25 +03 20.9 4.610 3.699 +1.13 - 8.2 19.5 18.8/116 21.3 5.6 306/0.23 165 1.00 27 12 28.00 +02 15.7 12 30.56 +01 59.1 4.532 3.683 +1.11 - 7.9 19.4 18.5/115 27.9 7.2 303/0.31 32 .25 Nov. 6 12 39.13 +00 56.2 12 41.69 +00 39.7 4.439 3.668 +1.09 - 7.7 19.4 18.0/115 34.7 8.8 300/0.38 85 .18 16 12 49.99 -00 20.5 12 52.55 -00 36.8 4.332 3.653 +1.05 - 7.3 19.3 17.4/115 41.7 10.4 298/0.46 136 1.00 26 13 00.49 -01 33.8 13 03.06 -01 49.9 4.212 3.638 +1.01 - 6.9 19.2 16.6/115 48.8 11.8 297/0.53 10 .24 Dec. 6 13 10.54 -02 42.9 13 13.12 -02 58.8 4.079 3.624 +0.95 - 6.4 19.1 15.6/114 56.1 13.0 295/0.61 113 .23 16 13 20.00 -03 47.3 13 22.59 -04 03.0 3.937 3.609 +0.87 - 5.9 19.0 14.3/114 63.7 14.1 294/0.68 108 .99 26 13 28.74 -04 46.4 13 31.34 -05 01.9 3.786 3.595 +0.79 - 5.3 18.9 12.9/114 71.4 15.0 293/0.75 16 .23 2025 Jan. 5 13 36.59 -05 39.6 13 39.19 -05 54.8 3.629 3.582 +0.68 - 4.7 18.8 11.1/115 79.4 15.7 292/0.81 143 .28 15 13 43.36 -06 26.4 13 45.98 -06 41.4 3.469 3.568 +0.55 - 4.0 18.7 9.1/116 87.7 16.0 291/0.87 79 .99 25 13 48.88 -07 06.2 13 51.50 -07 21.0 3.308 3.555 +0.41 - 3.2 18.6 6.8/118 96.4 16.0 290/0.91 42 .22 Feb. 4 13 52.92 -07 38.5 13 55.56 -07 53.2 3.151 3.542 +0.24 - 2.5 18.5 4.3/125 105.4 15.6 289/0.92 173 .35 14 13 55.31 -08 03.1 13 57.95 -08 17.7 3.000 3.530 +0.06 - 1.7 18.4 1.9/153 114.8 14.7 289/0.92 49 .98 24 13 55.89 -08 19.8 13 58.54 -08 34.4 2.860 3.518 -0.13 - 0.9 18.2 2.1/246 124.6 13.4 288/0.87 73 .19 Mar. 6 13 54.57 -08 28.6 13 57.21 -08 43.2 2.735 3.506 -0.32 - 0.2 18.1 4.7/268 134.9 11.6 287/0.79 143 .42 16 13 51.39 -08 30.0 13 54.03 -08 44.7 2.628 3.495 -0.49 + 0.5 18.0 7.2/274 145.6 9.3 287/0.66 16 .97 26 13 46.54 -08 25.0 13 49.17 -08 39.9 2.545 3.484 -0.62 + 1.0 17.9 9.2/276 156.7 6.5 285/0.48 110 .16

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