C/2024 Y1 (Masek) Orbit by S. Nakano CBET 5487 (2025) Observed in 1st half of 2025
Equinox 2000.0 T/TT q (AU) e P Peri. Node Inc. Tail(AU) 2024 Nov. 26.9961 0.825827 1.0 238.2936 112.3675 64.8796 0.200 m1 = 15.0 + 5 log Delta + 8.0 log r m2 = 16.0 + 5 log Delta + 5.0 log r + 0.03 phase 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 m2 , ¡ ¡ ¡ ¡ ¡ ¡ 2024 Dec. 26 22 01.56 -69 10.6 22 05.53 -68 56.0 1.091 0.987 +14.12 +24.0 15.1 . 85.0/ 91 56.5 56.3 113/7.88 84 .23 2025 Jan. 5 00 24.39 -65 12.8 00 26.69 -64 56.2 1.031 1.094 +9.34 +63.0 15.4 . 93.7/ 59 65.8 55.0 88/8.14 61 .28 15 01 58.30 -54 40.5 02 00.08 -54 26.0 1.016 1.215 +5.43 +78.3 15.7 . 95.1/ 40 74.8 51.4 75/7.80 114 .99 25 02 52.51 -41 35.5 02 54.40 -41 23.4 1.058 1.343 +3.53 +75.9 16.1 . 87.3/ 32 82.1 46.6 72/6.93 109 .22 Feb. 4 03 27.61 -28 55.0 03 29.69 -28 44.7 1.161 1.474 +2.61 +64.7 16.7 . 74.0/ 30 86.4 41.9 73/5.82 50 .35 14 03 53.54 -18 06.4 03 55.79 -17 57.7 1.315 1.608 +2.13 +51.8 17.2 . 60.3/ 32 87.4 37.8 77/4.76 106 .98 24 04 14.68 -09 27.4 04 17.08 -09 20.1 1.509 1.742 +1.86 +40.4 17.8 . 49.0/ 35 85.7 34.5 81/3.87 126 .19 Mar. 6 04 33.19 -02 42.0 04 35.70 -02 35.9 1.731 1.875 +1.70 +31.4 18.4 . 40.5/ 39 82.2 31.6 85/3.16 29 .42 16 04 50.12 +02 33.5 04 52.73 +02 38.4 1.970 2.007 +1.60 +24.6 18.9 . 34.3/ 44 77.6 28.9 88/2.58 119 .97 26 05 06.05 +06 40.6 05 08.74 +06 44.4 2.220 2.138 +1.53 +19.4 19.4 . 29.9/ 49 72.3 26.4 90/2.12 116 .16 Apr. 5 05 21.31 +09 56.0 05 24.07 +09 58.7 2.473 2.268 +1.48 +15.5 19.8 . 26.7/ 54 66.5 23.9 92/1.74 29 .49 15 05 36.08 +12 31.6 05 38.89 +12 33.3 2.727 2.396 +1.44 +12.4 20.2 . 24.4/ 59 60.4 21.4 94/1.43 139 .96 25 05 50.45 +14 36.5 05 53.30 +14 37.1 2.976 2.522 +1.41 +10.0 20.6 . 22.6/ 63 54.2 18.9 96/1.17 93 .11 May 5 06 04.48 +16 17.1 06 07.36 +16 16.7 3.217 2.647 +1.37 + 8.0 20.9 . 21.3/ 67 47.8 16.4 97/0.95 49 .54 15 06 18.17 +17 38.4 06 21.09 +17 36.9 3.448 2.770 +1.34 + 6.5 21.2 . 20.1/ 71 41.3 13.9 99/0.76 161 .95 25 06 31.54 +18 43.9 06 34.47 +18 41.5 3.666 2.892 +1.30 + 5.2 21.5 . 19.2/ 74 34.7 11.5 100/0.59 65 .07 June 4 06 44.57 +19 36.8 06 47.52 +19 33.4 3.869 3.012 +1.27 + 4.2 . 21.6 18.4/ 76 28.1 9.1 101/0.45 72 .58 14 06 57.23 +20 19.2 07 00.19 +20 15.0 4.055 3.131 +1.23 + 3.3 . 21.7 17.6/ 79 21.4 6.8 102/0.32 168 .93 24 07 09.51 +20 53.2 07 12.48 +20 48.1 4.222 3.248 +1.19 + 2.6 . 21.8 16.8/ 80 14.6 4.5 103/0.20 35 .03 July 4 07 21.37 +21 20.5 07 24.33 +21 14.6 4.369 3.364 +1.14 + 2.1 . 21.9 16.0/ 82 7.7 2.3 104/0.10 95 .61 14 07 32.76 +21 42.6 07 35.72 +21 35.9 4.495 3.479 +1.09 + 1.7 . 22.0 15.3/ 83 0.7 0.2 101/0.01 142 .89 24 07 43.65 +22 00.8 07 46.61 +21 53.4 4.599 3.592 +1.03 + 1.5 . 22.1 14.4/ 84 6.5 1.8 286/0.08 5 .01 Aug. 3 07 53.99 +22 16.4 07 56.95 +22 08.3 4.682 3.704 +0.97 + 1.4 . 22.3 13.6/ 84 13.7 3.7 287/0.15 120 .64 13 08 03.71 +22 30.7 08 06.67 +22 22.0 4.742 3.815 +0.90 + 1.4 . 22.5 12.6/ 83 21.2 5.5 287/0.22 111 .84 23 08 12.77 +22 44.8 08 15.72 +22 35.5 4.780 3.924 +0.83 + 1.5 . 22.6 11.6/ 82 28.8 7.1 288/0.29 26 .00 Sept. 2 08 21.07 +22 59.9 08 24.01 +22 50.2 4.796 4.033 +0.75 + 1.7 . 22.7 10.4/ 80 36.7 8.6 288/0.34 146 .66 12 08 28.53 +23 17.3 08 31.48 +23 07.2 4.793 4.140 +0.65 + 2.0 . 22.8 9.2/ 77 44.8 9.9 288/0.39 78 .77 22 08 35.07 +23 38.2 08 38.01 +23 27.6 4.771 4.247 +0.55 + 2.5 . 22.9 7.9/ 71 53.2 10.9 288/0.44 55 .00 Oct. 2 08 40.56 +24 03.6 08 43.50 +23 52.8 4.733 4.352 +0.43 + 3.1 . 22.9 6.7/ 62 61.9 11.7 288/0.47 175 .70 12 08 44.87 +24 34.7 08 47.81 +24 23.6 4.682 4.457 +0.30 + 3.8 . 23.0 5.6/ 48 70.9 12.2 288/0.50 42 .69 22 08 47.89 +25 12.4 08 50.84 +25 01.2 4.621 4.560 +0.16 + 4.5 . 23.0 5.0/ 26 80.3 12.4 287/0.51 86 .00 Nov. 1 08 49.47 +25 57.4 08 52.42 +25 46.0 4.555 4.663 0.00 + 5.2 . 23.0 5.2/ 0 90.1 12.3 286/0.51 151 .73 11 08 49.48 +26 49.8 08 52.45 +26 38.4 4.489 4.765 -0.16 + 6.0 . 23.0 6.3/340 100.2 11.8 284/0.50 7 .63 21 08 47.83 +27 49.2 08 50.82 +27 37.9 4.428 4.866 -0.33 + 6.6 . 23.0 7.9/326 110.7 10.9 282/0.47 119 .01 Dec. 1 08 44.46 +28 54.5 08 47.48 +28 43.4 4.378 4.966 -0.50 + 6.9 . 23.0 9.6/317 121.6 9.7 279/0.42 113 .78 11 08 39.41 +30 03.6 08 42.46 +29 52.9 4.346 5.065 -0.66 + 7.1 . 23.0 11.0/310 132.6 8.2 275/0.36 35 .59 21 08 32.82 +31 13.9 08 35.91 +31 03.5 4.337 5.164 -0.78 + 6.8 . 22.9 12.1/305 143.8 6.5 268/0.28 155 .01 31 08 24.97 +32 21.8 08 28.09 +32 11.9 4.357 5.261 -0.87 + 6.3 . 22.9 12.6/300 154.5 4.6 256/0.20 70 .84 2026 Jan. 10 08 16.27 +33 24.1 08 19.44 +33 14.7 4.409 5.358 -0.90 + 5.4 . 23.0 12.5/296 163.4 3.0 231/0.13 74 .56 20 08 07.23 +34 18.1 08 10.44 +34 09.1 4.494 5.455 -0.88 + 4.4 . 23.0 11.7/293 166.1 2.5 183/0.11 161 .01 30 07 58.41 +35 01.7 08 01.65 +34 53.4 4.615 5.550 -0.81 + 3.3 . 23.1 10.4/289 160.0 3.5 145/0.14 26 .89 Feb. 9 07 50.31 +35 34.6 07 53.57 +35 26.8 4.767 5.645 -0.69 + 2.3 . 23.3 8.8/286 150.3 5.0 128/0.20 111 .55 19 07 43.34 +35 57.3 07 46.63 +35 49.9 4.949 5.739 -0.55 + 1.4 . 23.5 6.9/282 139.8 6.4 118/0.25 122 .03 Mar. 1 07 37.80 +36 11.0 07 41.10 +36 04.0 5.155 5.833 -0.40 + 0.7 . 23.6 4.9/278 129.3 7.6 112/0.28 21 .93