メタデータ
| 項目 |
値 |
| Designation |
135P/Shoemaker-Levy 8 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
1999-12-10T12:02:32.936640Z |
| Orbit solution date (soln_date, UTC) |
2024-03-14T08:42:34Z |
| Obs used |
115 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
17.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1997-02-21.0000000 |
| e |
0.29022851 |
| q (au) |
2.716890 |
| a (au) |
3.827837 |
| i (deg) |
6.050581 |
| Ω (om, deg) |
213.361982 |
| ω (w, deg) |
22.698035 |
| M (ma, deg) |
225.433199 |
等級
散乱 + 全体線形
$$
M_a = (14.084 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.084 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
03:28:17.87 |
+16:07:24.6 |
HIP 16176 |
2.79 |
| 2026-03-26 12:00 |
03:28:40.06 |
+16:08:44.6 |
HIP 16176 |
5.67 |
| 2026-03-27 00:00 |
03:29:02.34 |
+16:10:04.6 |
HIP 16241 |
4.52 |
| 2026-03-27 12:00 |
03:29:24.72 |
+16:11:24.8 |
HIP 16241 |
1.33 |
| 2026-03-28 00:00 |
03:29:47.20 |
+16:12:45.0 |
HIP 16241 |
6.69 |
| 2026-03-28 12:00 |
03:30:09.77 |
+16:14:05.3 |
HIP 16241 |
12.25 |
| 2026-03-29 00:00 |
03:30:32.44 |
+16:15:25.7 |
HIP 16241 |
17.84 |
| 2026-03-29 12:00 |
03:30:55.20 |
+16:16:46.2 |
HIP 16241 |
23.46 |
| 2026-03-30 00:00 |
03:31:18.05 |
+16:18:06.7 |
HIP 16469 |
28.06 |
| 2026-03-30 12:00 |
03:31:40.99 |
+16:19:27.3 |
HIP 16538 |
24.66 |
| 2026-03-31 00:00 |
03:32:04.02 |
+16:20:48.0 |
HIP 16538 |
19.83 |
| 2026-03-31 12:00 |
03:32:27.15 |
+16:22:08.7 |
HIP 16538 |
15.58 |
| 2026-04-01 00:00 |
03:32:50.36 |
+16:23:29.5 |
HIP 16538 |
12.55 |
| 2026-04-01 12:00 |
03:33:13.66 |
+16:24:50.3 |
HIP 16538 |
11.74 |
| 2026-04-02 00:00 |
03:33:37.05 |
+16:26:11.1 |
HIP 16538 |
13.58 |
| 2026-04-02 12:00 |
03:34:00.52 |
+16:27:32.0 |
HIP 16538 |
17.27 |
| 2026-04-03 00:00 |
03:34:24.08 |
+16:28:52.9 |
HIP 16538 |
21.90 |
| 2026-04-03 12:00 |
03:34:47.73 |
+16:30:13.8 |
HIP 16788 |
18.26 |
| 2026-04-04 00:00 |
03:35:11.46 |
+16:31:34.7 |
HIP 16788 |
12.92 |
| 2026-04-04 12:00 |
03:35:35.27 |
+16:32:55.7 |
HIP 16788 |
8.29 |
| 2026-04-05 00:00 |
03:35:59.17 |
+16:34:16.7 |
HIP 16788 |
6.27 |
| 2026-04-05 12:00 |
03:36:23.15 |
+16:35:37.6 |
HIP 16831 |
5.41 |
| 2026-04-06 00:00 |
03:36:47.21 |
+16:36:58.6 |
HIP 16831 |
5.39 |
| 2026-04-06 12:00 |
03:37:11.36 |
+16:38:19.6 |
HIP 16831 |
9.96 |
| 2026-04-07 00:00 |
03:37:35.58 |
+16:39:40.5 |
HIP 16831 |
15.51 |
| 2026-04-07 12:00 |
03:37:59.89 |
+16:41:01.4 |
HIP 16831 |
21.30 |
| 2026-04-08 00:00 |
03:38:24.27 |
+16:42:22.3 |
HIP 17058 |
17.89 |
| 2026-04-08 12:00 |
03:38:48.73 |
+16:43:43.2 |
HIP 17058 |
14.53 |
| 2026-04-09 00:00 |
03:39:13.27 |
+16:45:04.1 |
HIP 17058 |
13.20 |
| 2026-04-09 12:00 |
03:39:37.89 |
+16:46:24.9 |
HIP 17058 |
14.50 |
| 2026-04-10 00:00 |
03:40:02.58 |
+16:47:45.7 |
HIP 17058 |
17.89 |
| 2026-04-10 12:00 |
03:40:27.35 |
+16:49:06.4 |
HIP 17058 |
22.44 |
| 2026-04-11 00:00 |
03:40:52.20 |
+16:50:27.1 |
HIP 17291 |
19.06 |
| 2026-04-11 12:00 |
03:41:17.12 |
+16:51:47.7 |
HIP 17291 |
13.05 |
| 2026-04-12 00:00 |
03:41:42.11 |
+16:53:08.3 |
HIP 17291 |
7.19 |
| 2026-04-12 12:00 |
03:42:07.18 |
+16:54:28.8 |
HIP 17291 |
2.89 |
| 2026-04-13 00:00 |
03:42:32.32 |
+16:55:49.2 |
HIP 17291 |
6.37 |
| 2026-04-13 12:00 |
03:42:57.53 |
+16:57:09.5 |
HIP 17291 |
12.22 |
| 2026-04-14 00:00 |
03:43:22.81 |
+16:58:29.8 |
HIP 17291 |
18.29 |
| 2026-04-14 12:00 |
03:43:48.16 |
+16:59:50.0 |
HIP 17414 |
19.49 |
| 2026-04-15 00:00 |
03:44:13.58 |
+17:01:10.1 |
HIP 17414 |
21.41 |
| 2026-04-15 12:00 |
03:44:39.07 |
+17:02:30.1 |
HIP 17414 |
24.78 |
| 2026-04-16 00:00 |
03:45:04.63 |
+17:03:50.0 |
HIP 17414 |
29.13 |