C/2023 T3 (Fuls)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/2023 T3 (Fuls) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2025-01-25T08:17:25.160640Z |
| Orbit solution date (soln_date, UTC) | 2026-03-07T14:42:54Z |
| Obs used | 1357 |
| NEO | - |
| M1 | 10.000 |
| K1 | 7.250 |
| PC | 0.030 |
| Discovery observation (MPC, UTC) | 2023-10-15T11:19:47.798400Z |
| Discovery magnitude (MPC) | 18.55 G |
| Discovery observatory (MPC) | G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-11-05.0000000 |
| e | 0.99538546 |
| q (au) | 3.548295 |
| a (au) | 768.937709 |
| i (deg) | 27.222046 |
| Ω (om, deg) | 246.000521 |
| ω (w, deg) | 302.847384 |
| M (ma, deg) | 359.996240 |
等級
散乱 + 全体線形
$$ M_a = (8.924 + 3.319\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 8.924 |
| n | 3.319 |
| gf | 0.860 |
| gb | -1.000 |
| k | 1.000 |
| δ90 | 1.000 |
| パラメータ | 記号 | 範囲 | 説明 |
|---|---|---|---|
| 太陽・地球距離が1 AUのときの絶対等級 | H0 | -5 to 20 | 彗星の固有の明るさ |
| 測光スロープパラメータ | n | 2 to 6 | 太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 | gf |
0.8 to 1 | 前方散乱の強さ |
| 後方散乱非対称係数 | gb |
-1 to -0.5 | 後方散乱の強さ |
| 分配係数 | k | 0.8 to 1 | 前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 | δ90 | 1 to 10 | ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) | 終了日 (UTC) | a | b |
|---|---|---|---|
| 2023-09-09 | 2024-02-27 | +9.6055 | -6.607 |
| 2024-02-27 | 2025-01-24 | -2.8861 | +1.593 |
| 2025-01-26 | 2025-08-17 | -8.0293 | +4.556 |
| 2025-08-17 | 2026-02-25 | +5.9060 | -4.079 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
ファインディングチャート
天体暦
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 17:45:34.03 | -18:19:32.6 | HIP 86873 | 21.80 |
| 2026-03-26 12:00 | 17:45:40.72 | -18:17:41.8 | HIP 86873 | 24.14 |
| 2026-03-27 00:00 | 17:45:47.21 | -18:15:50.8 | HIP 87061 | 25.52 |
| 2026-03-27 12:00 | 17:45:53.49 | -18:13:59.5 | HIP 87061 | 23.48 |
| 2026-03-28 00:00 | 17:45:59.57 | -18:12:07.9 | HIP 87061 | 21.56 |
| 2026-03-28 12:00 | 17:46:05.45 | -18:10:16.0 | HIP 87061 | 19.77 |
| 2026-03-29 00:00 | 17:46:11.12 | -18:08:24.0 | HIP 87061 | 18.16 |
| 2026-03-29 12:00 | 17:46:16.58 | -18:06:31.6 | HIP 87061 | 16.75 |
| 2026-03-30 00:00 | 17:46:21.84 | -18:04:39.1 | HIP 87061 | 15.61 |
| 2026-03-30 12:00 | 17:46:26.90 | -18:02:46.3 | HIP 87061 | 14.77 |
| 2026-03-31 00:00 | 17:46:31.75 | -18:00:53.2 | HIP 87061 | 14.27 |
| 2026-03-31 12:00 | 17:46:36.39 | -17:59:00.0 | HIP 87061 | 14.16 |
| 2026-04-01 00:00 | 17:46:40.83 | -17:57:06.5 | HIP 87061 | 14.41 |
| 2026-04-01 12:00 | 17:46:45.07 | -17:55:12.8 | HIP 87061 | 15.02 |
| 2026-04-02 00:00 | 17:46:49.10 | -17:53:18.8 | HIP 87061 | 15.92 |
| 2026-04-02 12:00 | 17:46:52.92 | -17:51:24.7 | HIP 87061 | 17.07 |
| 2026-04-03 00:00 | 17:46:56.54 | -17:49:30.3 | HIP 87061 | 18.41 |
| 2026-04-03 12:00 | 17:46:59.96 | -17:47:35.8 | HIP 87061 | 19.91 |
| 2026-04-04 00:00 | 17:47:03.17 | -17:45:41.0 | HIP 87061 | 21.51 |
| 2026-04-04 12:00 | 17:47:06.17 | -17:43:46.0 | HIP 87061 | 23.20 |
| 2026-04-05 00:00 | 17:47:08.97 | -17:41:50.9 | HIP 87061 | 24.95 |
| 2026-04-05 12:00 | 17:47:11.57 | -17:39:55.5 | HIP 87061 | 26.76 |
| 2026-04-06 00:00 | 17:47:13.96 | -17:38:00.0 | HIP 87061 | 28.60 |
| 2026-04-06 12:00 | 17:47:16.15 | -17:36:04.3 | HIP 87061 | 30.47 |
| 2026-04-07 00:00 | 17:47:18.13 | -17:34:08.4 | HIP 87061 | 32.36 |
| 2026-04-07 12:00 | 17:47:19.90 | -17:32:12.3 | HIP 87061 | 34.26 |
| 2026-04-08 00:00 | 17:47:21.48 | -17:30:16.1 | HIP 87061 | 36.18 |
| 2026-04-08 12:00 | 17:47:22.84 | -17:28:19.7 | HIP 87266 | 37.57 |
| 2026-04-09 00:00 | 17:47:24.01 | -17:26:23.1 | HIP 87266 | 36.86 |
| 2026-04-09 12:00 | 17:47:24.96 | -17:24:26.4 | HIP 87266 | 36.29 |
| 2026-04-10 00:00 | 17:47:25.72 | -17:22:29.5 | HIP 87161 | 35.84 |
| 2026-04-10 12:00 | 17:47:26.27 | -17:20:32.5 | HIP 87161 | 34.00 |
| 2026-04-11 00:00 | 17:47:26.62 | -17:18:35.3 | HIP 87161 | 32.20 |
| 2026-04-11 12:00 | 17:47:26.76 | -17:16:38.0 | HIP 87161 | 30.44 |
| 2026-04-12 00:00 | 17:47:26.71 | -17:14:40.6 | HIP 87161 | 28.73 |
| 2026-04-12 12:00 | 17:47:26.45 | -17:12:43.0 | HIP 87161 | 27.07 |
| 2026-04-13 00:00 | 17:47:25.98 | -17:10:45.3 | HIP 87161 | 25.48 |
| 2026-04-13 12:00 | 17:47:25.32 | -17:08:47.5 | HIP 87161 | 23.97 |
| 2026-04-14 00:00 | 17:47:24.45 | -17:06:49.6 | HIP 87161 | 22.57 |
| 2026-04-14 12:00 | 17:47:23.38 | -17:04:51.6 | HIP 87161 | 21.28 |
| 2026-04-15 00:00 | 17:47:22.12 | -17:02:53.4 | HIP 87161 | 20.15 |
| 2026-04-15 12:00 | 17:47:20.65 | -17:00:55.2 | HIP 87161 | 19.20 |
| 2026-04-16 00:00 | 17:47:18.98 | -16:58:56.9 | HIP 87161 | 18.45 |