145P/Shoemaker-Levy 5
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 145P/Shoemaker-Levy 5 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2017-08-31T17:52:40.448640Z |
| Orbit solution date (soln_date, UTC) | 2026-07-06T12:12:40Z |
| Obs used | 1434 |
| NEO | - |
| M1 | 11.400 |
| K1 | 15.250 |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2019-10-21.0000000 |
| e | 0.54065542 |
| q (au) | 1.902451 |
| a (au) | 4.141664 |
| i (deg) | 11.262204 |
| Ω (om, deg) | 26.796360 |
| ω (w, deg) | 10.294812 |
| M (ma, deg) | 91.238554 |
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) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 07:41:55.81 | +29:26:33.2 | HIP 37602 | 26.85 |
| 2026-07-29 12:00 | 07:42:59.66 | +29:24:39.5 | HIP 37693 | 12.93 |
| 2026-07-30 00:00 | 07:44:03.36 | +29:22:44.8 | HIP 37693 | 1.88 |
| 2026-07-30 12:00 | 07:45:06.92 | +29:20:48.9 | HIP 37693 | 15.22 |
| 2026-07-31 00:00 | 07:46:10.34 | +29:18:52.0 | HIP 38002 | 22.54 |
| 2026-07-31 12:00 | 07:47:13.61 | +29:16:53.9 | HIP 38002 | 18.65 |
| 2026-08-01 00:00 | 07:48:16.73 | +29:14:54.8 | HIP 38002 | 23.98 |
| 2026-08-01 12:00 | 07:49:19.71 | +29:12:54.6 | HIP 38363 | 27.84 |
| 2026-08-02 00:00 | 07:50:22.54 | +29:10:53.3 | HIP 38363 | 14.01 |
| 2026-08-02 12:00 | 07:51:25.22 | +29:08:51.1 | HIP 38363 | 1.26 |
| 2026-08-03 00:00 | 07:52:27.76 | +29:06:47.7 | HIP 38391 | 8.44 |
| 2026-08-03 12:00 | 07:53:30.16 | +29:04:43.4 | HIP 38586 | 10.92 |
| 2026-08-04 00:00 | 07:54:32.41 | +29:02:38.1 | HIP 38586 | 11.78 |
| 2026-08-04 12:00 | 07:55:34.51 | +29:00:31.8 | HIP 38586 | 23.15 |
| 2026-08-05 00:00 | 07:56:36.46 | +28:58:24.5 | HIP 38586 | 36.17 |
| 2026-08-05 12:00 | 07:57:38.26 | +28:56:16.3 | HIP 38921 | 34.91 |
| 2026-08-06 00:00 | 07:58:39.92 | +28:54:07.1 | HIP 39157 | 30.91 |
| 2026-08-06 12:00 | 07:59:41.43 | +28:51:56.9 | HIP 39157 | 23.72 |
| 2026-08-07 00:00 | 08:00:42.79 | +28:49:45.9 | HIP 39276 | 19.22 |
| 2026-08-07 12:00 | 08:01:44.01 | +28:47:34.0 | HIP 39276 | 9.71 |
| 2026-08-08 00:00 | 08:02:45.07 | +28:45:21.1 | HIP 39276 | 13.72 |
| 2026-08-08 12:00 | 08:03:45.98 | +28:43:07.4 | HIP 39276 | 25.47 |
| 2026-08-09 00:00 | 08:04:46.75 | +28:40:52.8 | HIP 39729 | 32.97 |
| 2026-08-09 12:00 | 08:05:47.36 | +28:38:37.4 | HIP 39729 | 19.49 |
| 2026-08-10 00:00 | 08:06:47.82 | +28:36:21.2 | HIP 39729 | 6.03 |
| 2026-08-10 12:00 | 08:07:48.13 | +28:34:04.1 | HIP 39729 | 7.41 |
| 2026-08-11 00:00 | 08:08:48.29 | +28:31:46.2 | HIP 39729 | 20.82 |
| 2026-08-11 12:00 | 08:09:48.30 | +28:29:27.5 | HIP 39729 | 34.20 |
| 2026-08-12 00:00 | 08:10:48.15 | +28:27:08.1 | HIP 40192 | 32.38 |
| 2026-08-12 12:00 | 08:11:47.85 | +28:24:47.9 | HIP 40278 | 23.85 |
| 2026-08-13 00:00 | 08:12:47.40 | +28:22:26.9 | HIP 40278 | 10.80 |
| 2026-08-13 12:00 | 08:13:46.79 | +28:20:05.2 | HIP 40278 | 4.31 |
| 2026-08-14 00:00 | 08:14:46.03 | +28:17:42.8 | HIP 40278 | 16.50 |
| 2026-08-14 12:00 | 08:15:45.12 | +28:15:19.7 | HIP 40278 | 29.59 |
| 2026-08-15 00:00 | 08:16:44.04 | +28:12:55.9 | HIP 40779 | 35.18 |
| 2026-08-15 12:00 | 08:17:42.82 | +28:10:31.4 | HIP 40779 | 22.45 |
| 2026-08-16 00:00 | 08:18:41.43 | +28:08:06.2 | HIP 40779 | 10.84 |
| 2026-08-16 12:00 | 08:19:39.89 | +28:05:40.4 | HIP 40779 | 8.74 |
| 2026-08-17 00:00 | 08:20:38.19 | +28:03:14.0 | HIP 40779 | 19.45 |
| 2026-08-17 12:00 | 08:21:36.34 | +28:00:46.9 | HIP 40779 | 31.95 |
| 2026-08-18 00:00 | 08:22:34.33 | +27:58:19.2 | HIP 41071 | 27.07 |
| 2026-08-18 12:00 | 08:23:32.16 | +27:55:50.9 | HIP 41071 | 26.28 |
| 2026-08-19 00:00 | 08:24:29.83 | +27:53:22.1 | HIP 41377 | 26.05 |