145P/Shoemaker-Levy 5
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 145P/Shoemaker-Levy 5 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2017-08-31T17:51:40.374720Z |
| Orbit solution date (soln_date, UTC) | 2026-04-14T13:42:31Z |
| Obs used | 1428 |
| NEO | - |
| M1 | 11.400 |
| K1 | 15.500 |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2019-10-10.0000000 |
| e | 0.54064716 |
| q (au) | 1.902518 |
| a (au) | 4.141736 |
| i (deg) | 11.262062 |
| Ω (om, deg) | 26.796716 |
| ω (w, deg) | 10.296312 |
| M (ma, deg) | 89.950011 |
等級
散乱 + 全体線形
$$ M_a = (10.587 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 10.587 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.998 |
| k | 1.000 |
| δ90 | 10.000 |
| 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 |
|---|---|---|---|
| 2025-06-23 | 2026-03-20 | +6.7174 | -2.115 |
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) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 05:24:41.55 | +30:02:38.5 | HIP 25237 | 15.87 |
| 2026-06-01 12:00 | 05:25:57.69 | +30:04:18.1 | HIP 25422 | 6.28 |
| 2026-06-02 00:00 | 05:27:13.78 | +30:05:55.3 | HIP 25492 | 6.70 |
| 2026-06-02 12:00 | 05:28:29.81 | +30:07:30.1 | HIP 25492 | 18.32 |
| 2026-06-03 00:00 | 05:29:45.79 | +30:09:02.5 | HIP 25789 | 18.75 |
| 2026-06-03 12:00 | 05:31:01.72 | +30:10:32.5 | HIP 25789 | 17.05 |
| 2026-06-04 00:00 | 05:32:17.60 | +30:12:00.2 | HIP 25789 | 27.79 |
| 2026-06-04 12:00 | 05:33:33.42 | +30:13:25.5 | HIP 26208 | 20.63 |
| 2026-06-05 00:00 | 05:34:49.18 | +30:14:48.4 | HIP 26208 | 4.40 |
| 2026-06-05 12:00 | 05:36:04.89 | +30:16:09.0 | HIP 26208 | 12.34 |
| 2026-06-06 00:00 | 05:37:20.54 | +30:17:27.2 | HIP 26550 | 18.65 |
| 2026-06-06 12:00 | 05:38:36.12 | +30:18:43.1 | HIP 26550 | 5.61 |
| 2026-06-07 00:00 | 05:39:51.65 | +30:19:56.7 | HIP 26601 | 13.46 |
| 2026-06-07 12:00 | 05:41:07.12 | +30:21:07.9 | HIP 26854 | 12.87 |
| 2026-06-08 00:00 | 05:42:22.52 | +30:22:16.8 | HIP 26854 | 5.74 |
| 2026-06-08 12:00 | 05:43:37.86 | +30:23:23.4 | HIP 27077 | 12.87 |
| 2026-06-09 00:00 | 05:44:53.13 | +30:24:27.7 | HIP 27077 | 6.80 |
| 2026-06-09 12:00 | 05:46:08.34 | +30:25:29.7 | HIP 27179 | 16.89 |
| 2026-06-10 00:00 | 05:47:23.48 | +30:26:29.5 | HIP 27404 | 11.77 |
| 2026-06-10 12:00 | 05:48:38.55 | +30:27:26.9 | HIP 27404 | 7.47 |
| 2026-06-11 00:00 | 05:49:53.56 | +30:28:22.1 | HIP 27548 | 5.45 |
| 2026-06-11 12:00 | 05:51:08.49 | +30:29:15.0 | HIP 27675 | 9.76 |
| 2026-06-12 00:00 | 05:52:23.35 | +30:30:05.6 | HIP 27825 | 11.83 |
| 2026-06-12 12:00 | 05:53:38.14 | +30:30:54.0 | HIP 27825 | 5.06 |
| 2026-06-13 00:00 | 05:54:52.85 | +30:31:40.2 | HIP 28022 | 14.49 |
| 2026-06-13 12:00 | 05:56:07.49 | +30:32:24.1 | HIP 28157 | 12.10 |
| 2026-06-14 00:00 | 05:57:22.05 | +30:33:05.8 | HIP 28157 | 5.85 |
| 2026-06-14 12:00 | 05:58:36.53 | +30:33:45.4 | HIP 28229 | 10.52 |
| 2026-06-15 00:00 | 05:59:50.93 | +30:34:22.7 | HIP 28402 | 23.24 |
| 2026-06-15 12:00 | 06:01:05.25 | +30:34:57.8 | HIP 28517 | 27.13 |
| 2026-06-16 00:00 | 06:02:19.49 | +30:35:30.7 | HIP 28517 | 30.46 |
| 2026-06-16 12:00 | 06:03:33.64 | +30:36:01.5 | HIP 28774 | 25.19 |
| 2026-06-17 00:00 | 06:04:47.71 | +30:36:30.0 | HIP 28774 | 22.42 |
| 2026-06-17 12:00 | 06:06:01.69 | +30:36:56.5 | HIP 29050 | 22.24 |
| 2026-06-18 00:00 | 06:07:15.59 | +30:37:20.8 | HIP 29050 | 7.07 |
| 2026-06-18 12:00 | 06:08:29.40 | +30:37:42.9 | HIP 29125 | 3.33 |
| 2026-06-19 00:00 | 06:09:43.11 | +30:38:03.0 | HIP 29273 | 8.44 |
| 2026-06-19 12:00 | 06:10:56.74 | +30:38:20.9 | HIP 29273 | 10.55 |
| 2026-06-20 00:00 | 06:12:10.27 | +30:38:36.7 | HIP 29463 | 20.05 |
| 2026-06-20 12:00 | 06:13:23.71 | +30:38:50.4 | HIP 29617 | 16.30 |
| 2026-06-21 00:00 | 06:14:37.05 | +30:39:02.0 | HIP 29617 | 8.09 |
| 2026-06-21 12:00 | 06:15:50.30 | +30:39:11.6 | HIP 29742 | 7.89 |
| 2026-06-22 00:00 | 06:17:03.45 | +30:39:19.1 | HIP 29742 | 17.59 |