メタデータ
| 項目 |
値 |
| Designation |
181P/Shoemaker-Levy 6 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-06-10T07:49:11.971200Z |
| Orbit solution date (soln_date, UTC) |
2014-08-29T13:06:38Z |
| Obs used |
88 |
| NEO |
Yes |
| M1 |
16.300 |
| K1 |
17.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-09-08.0000000 |
| e |
0.70732283 |
| q (au) |
1.123593 |
| a (au) |
3.839018 |
| i (deg) |
16.981179 |
| Ω (om, deg) |
37.679458 |
| ω (w, deg) |
333.798849 |
| M (ma, deg) |
11.750089 |
等級
散乱 + 全体線形
$$
M_a = (15.941 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.941 |
| n |
2.000 |
| gf |
0.901 |
| gb |
-0.500 |
| k |
0.861 |
| δ90 |
4.048 |
| 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) |
| 2026-05-12 00:00 |
12:57:30.95 |
+00:19:11.4 |
HIP 63342 |
19.52 |
| 2026-05-12 12:00 |
12:57:18.73 |
+00:19:47.2 |
HIP 63342 |
22.47 |
| 2026-05-13 00:00 |
12:57:06.63 |
+00:20:22.1 |
HIP 63342 |
25.42 |
| 2026-05-13 12:00 |
12:56:54.65 |
+00:20:56.2 |
HIP 63093 |
25.95 |
| 2026-05-14 00:00 |
12:56:42.78 |
+00:21:29.3 |
HIP 63093 |
24.27 |
| 2026-05-14 12:00 |
12:56:31.03 |
+00:22:01.5 |
HIP 63093 |
22.87 |
| 2026-05-15 00:00 |
12:56:19.39 |
+00:22:32.9 |
HIP 63093 |
21.79 |
| 2026-05-15 12:00 |
12:56:07.88 |
+00:23:03.3 |
HIP 63093 |
21.07 |
| 2026-05-16 00:00 |
12:55:56.48 |
+00:23:32.8 |
HIP 63093 |
20.73 |
| 2026-05-16 12:00 |
12:55:45.21 |
+00:24:01.5 |
HIP 63093 |
20.78 |
| 2026-05-17 00:00 |
12:55:34.06 |
+00:24:29.2 |
HIP 63093 |
21.20 |
| 2026-05-17 12:00 |
12:55:23.04 |
+00:24:55.9 |
HIP 63093 |
21.95 |
| 2026-05-18 00:00 |
12:55:12.14 |
+00:25:21.8 |
HIP 63093 |
23.00 |
| 2026-05-18 12:00 |
12:55:01.37 |
+00:25:46.7 |
HIP 63093 |
24.30 |
| 2026-05-19 00:00 |
12:54:50.72 |
+00:26:10.7 |
HIP 63093 |
25.78 |
| 2026-05-19 12:00 |
12:54:40.20 |
+00:26:33.7 |
HIP 63093 |
27.43 |
| 2026-05-20 00:00 |
12:54:29.82 |
+00:26:55.8 |
HIP 63093 |
29.19 |
| 2026-05-20 12:00 |
12:54:19.56 |
+00:27:17.0 |
HIP 63093 |
31.03 |
| 2026-05-21 00:00 |
12:54:09.43 |
+00:27:37.2 |
HIP 63093 |
32.95 |
| 2026-05-21 12:00 |
12:53:59.43 |
+00:27:56.5 |
HIP 63093 |
34.91 |
| 2026-05-22 00:00 |
12:53:49.57 |
+00:28:14.9 |
HIP 62759 |
32.64 |
| 2026-05-22 12:00 |
12:53:39.84 |
+00:28:32.3 |
HIP 62759 |
30.20 |
| 2026-05-23 00:00 |
12:53:30.24 |
+00:28:48.8 |
HIP 62759 |
27.79 |
| 2026-05-23 12:00 |
12:53:20.78 |
+00:29:04.3 |
HIP 62759 |
25.42 |
| 2026-05-24 00:00 |
12:53:11.45 |
+00:29:18.9 |
HIP 62759 |
23.08 |
| 2026-05-24 12:00 |
12:53:02.26 |
+00:29:32.5 |
HIP 62759 |
20.78 |
| 2026-05-25 00:00 |
12:52:53.20 |
+00:29:45.2 |
HIP 62759 |
18.52 |
| 2026-05-25 12:00 |
12:52:44.28 |
+00:29:57.0 |
HIP 62759 |
16.29 |
| 2026-05-26 00:00 |
12:52:35.50 |
+00:30:07.8 |
HIP 62759 |
14.10 |
| 2026-05-26 12:00 |
12:52:26.86 |
+00:30:17.6 |
HIP 62759 |
11.94 |
| 2026-05-27 00:00 |
12:52:18.35 |
+00:30:26.5 |
HIP 62759 |
9.83 |
| 2026-05-27 12:00 |
12:52:09.98 |
+00:30:34.5 |
HIP 62759 |
7.76 |
| 2026-05-28 00:00 |
12:52:01.76 |
+00:30:41.5 |
HIP 62759 |
5.73 |
| 2026-05-28 12:00 |
12:51:53.67 |
+00:30:47.6 |
HIP 62759 |
3.78 |
| 2026-05-29 00:00 |
12:51:45.72 |
+00:30:52.7 |
HIP 62759 |
1.99 |
| 2026-05-29 12:00 |
12:51:37.91 |
+00:30:56.9 |
HIP 62759 |
1.22 |
| 2026-05-30 00:00 |
12:51:30.24 |
+00:31:00.1 |
HIP 62759 |
2.54 |
| 2026-05-30 12:00 |
12:51:22.72 |
+00:31:02.4 |
HIP 62759 |
4.29 |
| 2026-05-31 00:00 |
12:51:15.33 |
+00:31:03.8 |
HIP 62759 |
6.09 |
| 2026-05-31 12:00 |
12:51:08.09 |
+00:31:04.2 |
HIP 62759 |
7.87 |
| 2026-06-01 00:00 |
12:51:00.99 |
+00:31:03.6 |
HIP 62759 |
9.62 |
| 2026-06-01 12:00 |
12:50:54.04 |
+00:31:02.2 |
HIP 62759 |
11.34 |
| 2026-06-02 00:00 |
12:50:47.22 |
+00:30:59.8 |
HIP 62759 |
13.03 |