C/2023 T3 (Fuls)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/2023 T3 (Fuls) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2025-01-25T08:15:42.802560Z |
| Orbit solution date (soln_date, UTC) | 2026-07-16T19:12:18Z |
| Obs used | 1367 |
| 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 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-11-10.0000000 |
| e | 0.99539803 |
| q (au) | 3.548298 |
| a (au) | 771.038375 |
| i (deg) | 27.222056 |
| Ω (om, deg) | 246.000476 |
| ω (w, deg) | 302.847226 |
| M (ma, deg) | 359.996485 |
等級
散乱 + 全体線形
$$ M_a = (10.112 + 3.391\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 10.112 |
| n | 3.391 |
| gf | 0.961 |
| gb | -0.520 |
| k | 0.800 |
| δ90 | 8.518 |
| 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 | 2024-03-09 | +10.8997 | -7.529 |
| 2024-03-09 | 2025-01-24 | -2.4934 | +1.361 |
| 2025-01-26 | 2025-08-23 | -8.4094 | +4.780 |
| 2025-08-23 | 2026-07-12 | +6.4360 | -4.424 |
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) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 17:11:05.81 | -11:58:03.7 | HIP 84161 | 28.12 |
| 2026-07-29 12:00 | 17:11:01.08 | -11:57:38.4 | HIP 84161 | 28.57 |
| 2026-07-30 00:00 | 17:10:56.50 | -11:57:13.7 | HIP 84161 | 29.05 |
| 2026-07-30 12:00 | 17:10:52.08 | -11:56:49.7 | HIP 84161 | 29.55 |
| 2026-07-31 00:00 | 17:10:47.82 | -11:56:26.2 | HIP 84161 | 30.07 |
| 2026-07-31 12:00 | 17:10:43.72 | -11:56:03.4 | HIP 84161 | 30.59 |
| 2026-08-01 00:00 | 17:10:39.77 | -11:55:41.1 | HIP 84161 | 31.11 |
| 2026-08-01 12:00 | 17:10:35.98 | -11:55:19.5 | HIP 84161 | 31.64 |
| 2026-08-02 00:00 | 17:10:32.36 | -11:54:58.5 | HIP 83867 | 31.91 |
| 2026-08-02 12:00 | 17:10:28.89 | -11:54:38.0 | HIP 83867 | 31.16 |
| 2026-08-03 00:00 | 17:10:25.57 | -11:54:18.1 | HIP 83867 | 30.46 |
| 2026-08-03 12:00 | 17:10:22.42 | -11:53:58.8 | HIP 83867 | 29.80 |
| 2026-08-04 00:00 | 17:10:19.43 | -11:53:40.1 | HIP 83867 | 29.18 |
| 2026-08-04 12:00 | 17:10:16.60 | -11:53:22.0 | HIP 83867 | 28.61 |
| 2026-08-05 00:00 | 17:10:13.92 | -11:53:04.4 | HIP 83867 | 28.07 |
| 2026-08-05 12:00 | 17:10:11.41 | -11:52:47.4 | HIP 83867 | 27.59 |
| 2026-08-06 00:00 | 17:10:09.06 | -11:52:31.0 | HIP 83867 | 27.14 |
| 2026-08-06 12:00 | 17:10:06.86 | -11:52:15.1 | HIP 83867 | 26.73 |
| 2026-08-07 00:00 | 17:10:04.83 | -11:51:59.7 | HIP 83867 | 26.37 |
| 2026-08-07 12:00 | 17:10:02.96 | -11:51:44.9 | HIP 83867 | 26.04 |
| 2026-08-08 00:00 | 17:10:01.25 | -11:51:30.7 | HIP 83867 | 25.75 |
| 2026-08-08 12:00 | 17:09:59.70 | -11:51:17.0 | HIP 83867 | 25.50 |
| 2026-08-09 00:00 | 17:09:58.31 | -11:51:03.8 | HIP 83867 | 25.29 |
| 2026-08-09 12:00 | 17:09:57.09 | -11:50:51.2 | HIP 83867 | 25.11 |
| 2026-08-10 00:00 | 17:09:56.03 | -11:50:39.0 | HIP 83867 | 24.97 |
| 2026-08-10 12:00 | 17:09:55.12 | -11:50:27.4 | HIP 83867 | 24.86 |
| 2026-08-11 00:00 | 17:09:54.38 | -11:50:16.4 | HIP 83867 | 24.79 |
| 2026-08-11 12:00 | 17:09:53.81 | -11:50:05.8 | HIP 83867 | 24.75 |
| 2026-08-12 00:00 | 17:09:53.39 | -11:49:55.7 | HIP 83867 | 24.74 |
| 2026-08-12 12:00 | 17:09:53.14 | -11:49:46.1 | HIP 83867 | 24.77 |
| 2026-08-13 00:00 | 17:09:53.04 | -11:49:37.0 | HIP 83867 | 24.82 |
| 2026-08-13 12:00 | 17:09:53.11 | -11:49:28.4 | HIP 83867 | 24.91 |
| 2026-08-14 00:00 | 17:09:53.35 | -11:49:20.3 | HIP 83867 | 25.03 |
| 2026-08-14 12:00 | 17:09:53.74 | -11:49:12.6 | HIP 83867 | 25.17 |
| 2026-08-15 00:00 | 17:09:54.29 | -11:49:05.4 | HIP 83867 | 25.35 |
| 2026-08-15 12:00 | 17:09:55.01 | -11:48:58.7 | HIP 83867 | 25.56 |
| 2026-08-16 00:00 | 17:09:55.89 | -11:48:52.4 | HIP 83867 | 25.80 |
| 2026-08-16 12:00 | 17:09:56.93 | -11:48:46.6 | HIP 83867 | 26.07 |
| 2026-08-17 00:00 | 17:09:58.13 | -11:48:41.2 | HIP 83867 | 26.37 |
| 2026-08-17 12:00 | 17:09:59.49 | -11:48:36.3 | HIP 83867 | 26.69 |
| 2026-08-18 00:00 | 17:10:01.01 | -11:48:31.7 | HIP 83867 | 27.05 |
| 2026-08-18 12:00 | 17:10:02.68 | -11:48:27.7 | HIP 83867 | 27.44 |
| 2026-08-19 00:00 | 17:10:04.52 | -11:48:24.0 | HIP 83867 | 27.87 |