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) |
|---|---|---|---|---|
| 2026-09-20 00:00 | 09:20:26.86 | +25:04:00.9 | HIP 45869 | 11.47 |
| 2026-09-20 12:00 | 09:21:13.92 | +25:01:21.6 | HIP 45869 | 8.49 |
| 2026-09-21 00:00 | 09:22:00.80 | +24:58:42.6 | HIP 45869 | 15.90 |
| 2026-09-21 12:00 | 09:22:47.52 | +24:56:03.8 | HIP 46058 | 17.97 |
| 2026-09-22 00:00 | 09:23:34.05 | +24:53:25.4 | HIP 46058 | 17.55 |
| 2026-09-22 12:00 | 09:24:20.42 | +24:50:47.2 | HIP 46202 | 13.88 |
| 2026-09-23 00:00 | 09:25:06.61 | +24:48:09.3 | HIP 46202 | 4.42 |
| 2026-09-23 12:00 | 09:25:52.63 | +24:45:31.8 | HIP 46202 | 8.92 |
| 2026-09-24 00:00 | 09:26:38.47 | +24:42:54.6 | HIP 46202 | 19.24 |
| 2026-09-24 12:00 | 09:27:24.14 | +24:40:17.8 | HIP 46202 | 29.82 |
| 2026-09-25 00:00 | 09:28:09.63 | +24:37:41.3 | HIP 46595 | 26.60 |
| 2026-09-25 12:00 | 09:28:54.95 | +24:35:05.2 | HIP 46595 | 17.11 |
| 2026-09-26 00:00 | 09:29:40.10 | +24:32:29.5 | HIP 46595 | 10.19 |
| 2026-09-26 12:00 | 09:30:25.07 | +24:29:54.1 | HIP 46595 | 11.77 |
| 2026-09-27 00:00 | 09:31:09.86 | +24:27:19.2 | HIP 46729 | 5.20 |
| 2026-09-27 12:00 | 09:31:54.48 | +24:24:44.7 | HIP 46729 | 5.59 |
| 2026-09-28 00:00 | 09:32:38.92 | +24:22:10.6 | HIP 46729 | 15.93 |
| 2026-09-28 12:00 | 09:33:23.19 | +24:19:37.0 | HIP 46923 | 7.12 |
| 2026-09-29 00:00 | 09:34:07.28 | +24:17:03.8 | HIP 46923 | 4.25 |
| 2026-09-29 12:00 | 09:34:51.19 | +24:14:31.1 | HIP 46923 | 14.11 |
| 2026-09-30 00:00 | 09:35:34.93 | +24:11:58.9 | HIP 46923 | 24.33 |
| 2026-09-30 12:00 | 09:36:18.49 | +24:09:27.2 | HIP 47258 | 22.96 |
| 2026-10-01 00:00 | 09:37:01.87 | +24:06:55.9 | HIP 47258 | 12.75 |
| 2026-10-01 12:00 | 09:37:45.07 | +24:04:25.2 | HIP 47258 | 2.59 |
| 2026-10-02 00:00 | 09:38:28.09 | +24:01:55.1 | HIP 47258 | 7.57 |
| 2026-10-02 12:00 | 09:39:10.94 | +23:59:25.4 | HIP 47258 | 17.66 |
| 2026-10-03 00:00 | 09:39:53.60 | +23:56:56.4 | HIP 47354 | 27.49 |
| 2026-10-03 12:00 | 09:40:36.08 | +23:54:27.9 | HIP 47354 | 35.09 |
| 2026-10-04 00:00 | 09:41:18.38 | +23:52:00.0 | HIP 47644 | 26.23 |
| 2026-10-04 12:00 | 09:42:00.50 | +23:49:32.7 | HIP 47644 | 17.51 |
| 2026-10-05 00:00 | 09:42:42.43 | +23:47:06.0 | HIP 47644 | 11.10 |
| 2026-10-05 12:00 | 09:43:24.18 | +23:44:40.0 | HIP 47644 | 11.66 |
| 2026-10-06 00:00 | 09:44:05.75 | +23:42:14.6 | HIP 47644 | 18.49 |
| 2026-10-06 12:00 | 09:44:47.13 | +23:39:49.8 | HIP 47853 | 13.00 |
| 2026-10-07 00:00 | 09:45:28.32 | +23:37:25.8 | HIP 47853 | 9.48 |
| 2026-10-07 12:00 | 09:46:09.33 | +23:35:02.4 | HIP 47908 | 12.16 |
| 2026-10-08 00:00 | 09:46:50.15 | +23:32:39.7 | HIP 48023 | 9.61 |
| 2026-10-08 12:00 | 09:47:30.79 | +23:30:17.7 | HIP 48023 | 8.79 |
| 2026-10-09 00:00 | 09:48:11.23 | +23:27:56.5 | HIP 48023 | 15.67 |
| 2026-10-09 12:00 | 09:48:51.48 | +23:25:36.0 | HIP 48023 | 24.38 |
| 2026-10-10 00:00 | 09:49:31.55 | +23:23:16.2 | HIP 48023 | 33.50 |
| 2026-10-10 12:00 | 09:50:11.42 | +23:20:57.3 | HIP 48315 | 32.46 |
| 2026-10-11 00:00 | 09:50:51.10 | +23:18:39.1 | HIP 48398 | 24.56 |