145P/Shoemaker-Levy 5
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 145P/Shoemaker-Levy 5 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2017-08-31T18:41:55.475520Z |
| Orbit solution date (soln_date, UTC) | 2026-01-13T08:12:54Z |
| Obs used | 1324 |
| NEO | - |
| M1 | 11.800 |
| K1 | 14.250 |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2019-03-12.0000000 |
| e | 0.54057729 |
| q (au) | 1.903429 |
| a (au) | 4.143088 |
| i (deg) | 11.260275 |
| Ω (om, deg) | 26.802736 |
| ω (w, deg) | 10.323034 |
| M (ma, deg) | 65.124623 |
等級
散乱 + 全体線形
$$ M_a = (10.700 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 10.700 |
| 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 | 2026-01-25 | +11.9247 | -4.129 |
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) |
|---|---|---|---|---|
| 2026-02-03 00:00 | 00:40:03.62 | +06:21:41.7 | HIP 3033 | 30.11 |
| 2026-02-03 12:00 | 00:41:05.81 | +06:30:33.2 | HIP 3393 | 32.63 |
| 2026-02-04 00:00 | 00:42:08.11 | +06:39:24.3 | HIP 3382 | 15.60 |
| 2026-02-04 12:00 | 00:43:10.53 | +06:48:15.1 | HIP 3382 | 3.00 |
| 2026-02-05 00:00 | 00:44:13.07 | +06:57:05.5 | HIP 3382 | 20.31 |
| 2026-02-05 12:00 | 00:45:15.73 | +07:05:55.5 | HIP 3382 | 38.15 |
| 2026-02-06 00:00 | 00:46:18.51 | +07:14:45.2 | HIP 3760 | 29.65 |
| 2026-02-06 12:00 | 00:47:21.40 | +07:23:34.4 | HIP 3760 | 14.95 |
| 2026-02-07 00:00 | 00:48:24.42 | +07:32:23.2 | HIP 3786 | 4.91 |
| 2026-02-07 12:00 | 00:49:27.55 | +07:41:11.6 | HIP 3904 | 9.16 |
| 2026-02-08 00:00 | 00:50:30.80 | +07:49:59.5 | HIP 3904 | 11.87 |
| 2026-02-08 12:00 | 00:51:34.17 | +07:58:47.0 | HIP 3963 | 10.35 |
| 2026-02-09 00:00 | 00:52:37.65 | +08:07:33.9 | HIP 4113 | 25.49 |
| 2026-02-09 12:00 | 00:53:41.25 | +08:16:20.4 | HIP 4094 | 29.02 |
| 2026-02-10 00:00 | 00:54:44.97 | +08:25:06.4 | HIP 4399 | 25.42 |
| 2026-02-10 12:00 | 00:55:48.80 | +08:33:51.8 | HIP 4399 | 17.03 |
| 2026-02-11 00:00 | 00:56:52.75 | +08:42:36.7 | HIP 4399 | 24.20 |
| 2026-02-11 12:00 | 00:57:56.82 | +08:51:21.0 | HIP 4413 | 30.51 |
| 2026-02-12 00:00 | 00:59:01.00 | +09:00:04.8 | HIP 4752 | 33.74 |
| 2026-02-12 12:00 | 01:00:05.30 | +09:08:47.9 | HIP 4728 | 22.31 |
| 2026-02-13 00:00 | 01:01:09.71 | +09:17:30.5 | HIP 4728 | 13.59 |
| 2026-02-13 12:00 | 01:02:14.24 | +09:26:12.4 | HIP 4878 | 19.52 |
| 2026-02-14 00:00 | 01:03:18.88 | +09:34:53.7 | HIP 5048 | 19.62 |
| 2026-02-14 12:00 | 01:04:23.63 | +09:43:34.4 | HIP 5048 | 9.16 |
| 2026-02-15 00:00 | 01:05:28.50 | +09:52:14.3 | HIP 5048 | 21.06 |
| 2026-02-15 12:00 | 01:06:33.49 | +10:00:53.6 | HIP 5092 | 25.29 |
| 2026-02-16 00:00 | 01:07:38.58 | +10:09:32.2 | HIP 5344 | 18.43 |
| 2026-02-16 12:00 | 01:08:43.79 | +10:18:10.0 | HIP 5344 | 24.28 |
| 2026-02-17 00:00 | 01:09:49.11 | +10:26:47.2 | HIP 5422 | 24.18 |
| 2026-02-17 12:00 | 01:10:54.55 | +10:35:23.5 | HIP 5575 | 19.78 |
| 2026-02-18 00:00 | 01:12:00.09 | +10:43:59.1 | HIP 5662 | 14.40 |
| 2026-02-18 12:00 | 01:13:05.75 | +10:52:33.9 | HIP 5662 | 18.31 |
| 2026-02-19 00:00 | 01:14:11.51 | +11:01:07.9 | HIP 5870 | 26.89 |
| 2026-02-19 12:00 | 01:15:17.39 | +11:09:41.1 | HIP 5920 | 22.25 |
| 2026-02-20 00:00 | 01:16:23.37 | +11:18:13.4 | HIP 5920 | 10.44 |
| 2026-02-20 12:00 | 01:17:29.47 | +11:26:44.9 | HIP 5920 | 19.82 |
| 2026-02-21 00:00 | 01:18:35.67 | +11:35:15.5 | HIP 6251 | 26.28 |
| 2026-02-21 12:00 | 01:19:41.98 | +11:43:45.2 | HIP 6251 | 7.99 |
| 2026-02-22 00:00 | 01:20:48.40 | +11:52:13.9 | HIP 6251 | 10.42 |
| 2026-02-22 12:00 | 01:21:54.93 | +12:00:41.8 | HIP 6251 | 28.74 |
| 2026-02-23 00:00 | 01:23:01.56 | +12:09:08.7 | HIP 6376 | 31.20 |
| 2026-02-23 12:00 | 01:24:08.30 | +12:17:34.6 | HIP 6660 | 21.23 |
| 2026-02-24 00:00 | 01:25:15.14 | +12:25:59.5 | HIP 6660 | 16.93 |