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
$$ M_a = (10.649 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 10.649 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.500 |
| 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 | 2026-02-26 | +8.2296 | -2.716 |
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) |
|---|---|---|---|---|
| 2026-05-12 00:00 | 04:33:28.32 | +28:22:34.2 | HIP 21262 | 21.44 |
| 2026-05-12 12:00 | 04:34:45.47 | +28:25:53.1 | HIP 21353 | 22.09 |
| 2026-05-13 00:00 | 04:36:02.62 | +28:29:09.6 | HIP 21353 | 29.46 |
| 2026-05-13 12:00 | 04:37:19.77 | +28:32:23.5 | HIP 21617 | 18.46 |
| 2026-05-14 00:00 | 04:38:36.92 | +28:35:34.9 | HIP 21617 | 7.71 |
| 2026-05-14 12:00 | 04:39:54.07 | +28:38:43.7 | HIP 21707 | 8.95 |
| 2026-05-15 00:00 | 04:41:11.21 | +28:41:50.1 | HIP 21819 | 5.27 |
| 2026-05-15 12:00 | 04:42:28.35 | +28:44:53.9 | HIP 21845 | 10.45 |
| 2026-05-16 00:00 | 04:43:45.48 | +28:47:55.2 | HIP 21845 | 27.22 |
| 2026-05-16 12:00 | 04:45:02.60 | +28:50:54.0 | HIP 22138 | 15.33 |
| 2026-05-17 00:00 | 04:46:19.71 | +28:53:50.2 | HIP 22138 | 15.61 |
| 2026-05-17 12:00 | 04:47:36.81 | +28:56:44.0 | HIP 22309 | 19.71 |
| 2026-05-18 00:00 | 04:48:53.90 | +28:59:35.2 | HIP 22460 | 14.80 |
| 2026-05-18 12:00 | 04:50:10.98 | +29:02:23.9 | HIP 22460 | 6.34 |
| 2026-05-19 00:00 | 04:51:28.03 | +29:05:10.1 | HIP 22460 | 21.08 |
| 2026-05-19 12:00 | 04:52:45.08 | +29:07:53.8 | HIP 22778 | 20.20 |
| 2026-05-20 00:00 | 04:54:02.10 | +29:10:34.9 | HIP 22778 | 10.21 |
| 2026-05-20 12:00 | 04:55:19.10 | +29:13:13.6 | HIP 22778 | 19.49 |
| 2026-05-21 00:00 | 04:56:36.08 | +29:15:49.8 | HIP 23048 | 29.15 |
| 2026-05-21 12:00 | 04:57:53.04 | +29:18:23.4 | HIP 23048 | 24.18 |
| 2026-05-22 00:00 | 04:59:09.97 | +29:20:54.6 | HIP 23291 | 20.34 |
| 2026-05-22 12:00 | 05:00:26.88 | +29:23:23.2 | HIP 23291 | 5.44 |
| 2026-05-23 00:00 | 05:01:43.76 | +29:25:49.4 | HIP 23336 | 9.36 |
| 2026-05-23 12:00 | 05:03:00.61 | +29:28:13.1 | HIP 23598 | 21.00 |
| 2026-05-24 00:00 | 05:04:17.43 | +29:30:34.3 | HIP 23598 | 7.48 |
| 2026-05-24 12:00 | 05:05:34.22 | +29:32:53.0 | HIP 23744 | 15.49 |
| 2026-05-25 00:00 | 05:06:50.98 | +29:35:09.2 | HIP 23744 | 13.57 |
| 2026-05-25 12:00 | 05:08:07.71 | +29:37:22.9 | HIP 24005 | 22.20 |
| 2026-05-26 00:00 | 05:09:24.40 | +29:39:34.2 | HIP 24005 | 8.46 |
| 2026-05-26 12:00 | 05:10:41.05 | +29:41:43.0 | HIP 24160 | 8.32 |
| 2026-05-27 00:00 | 05:11:57.67 | +29:43:49.4 | HIP 24160 | 8.58 |
| 2026-05-27 12:00 | 05:13:14.25 | +29:45:53.3 | HIP 24193 | 22.41 |
| 2026-05-28 00:00 | 05:14:30.79 | +29:47:54.7 | HIP 24557 | 31.57 |
| 2026-05-28 12:00 | 05:15:47.29 | +29:49:53.7 | HIP 24557 | 22.04 |
| 2026-05-29 00:00 | 05:17:03.74 | +29:51:50.2 | HIP 24557 | 23.08 |
| 2026-05-29 12:00 | 05:18:20.16 | +29:53:44.3 | HIP 24759 | 21.87 |
| 2026-05-30 00:00 | 05:19:36.53 | +29:55:36.0 | HIP 24759 | 24.51 |
| 2026-05-30 12:00 | 05:20:52.86 | +29:57:25.3 | HIP 25001 | 23.62 |
| 2026-05-31 00:00 | 05:22:09.14 | +29:59:12.1 | HIP 25157 | 19.01 |
| 2026-05-31 12:00 | 05:23:25.37 | +30:00:56.5 | HIP 25237 | 14.39 |
| 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 |