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
$$
M_a = (15.938 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.938 |
| n |
2.000 |
| gf |
0.900 |
| gb |
-0.500 |
| k |
0.861 |
| δ90 |
3.979 |
| 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) |
| 2026-09-20 00:00 |
13:16:31.04 |
-04:22:35.6 |
HIP 64811 |
22.18 |
| 2026-09-20 12:00 |
13:16:47.66 |
-04:24:39.4 |
HIP 64811 |
19.14 |
| 2026-09-21 00:00 |
13:17:04.31 |
-04:26:43.3 |
HIP 64811 |
16.84 |
| 2026-09-21 12:00 |
13:17:21.01 |
-04:28:47.3 |
HIP 64811 |
15.61 |
| 2026-09-22 00:00 |
13:17:37.75 |
-04:30:51.4 |
HIP 64811 |
15.73 |
| 2026-09-22 12:00 |
13:17:54.53 |
-04:32:55.6 |
HIP 64811 |
17.16 |
| 2026-09-23 00:00 |
13:18:11.35 |
-04:34:59.8 |
HIP 64811 |
19.63 |
| 2026-09-23 12:00 |
13:18:28.21 |
-04:37:04.1 |
HIP 64811 |
22.81 |
| 2026-09-24 00:00 |
13:18:45.10 |
-04:39:08.4 |
HIP 64811 |
26.45 |
| 2026-09-24 12:00 |
13:19:02.04 |
-04:41:12.8 |
HIP 64811 |
30.39 |
| 2026-09-25 00:00 |
13:19:19.01 |
-04:43:17.3 |
HIP 64811 |
34.53 |
| 2026-09-25 12:00 |
13:19:36.02 |
-04:45:21.8 |
HIP 64811 |
38.81 |
| 2026-09-26 00:00 |
13:19:53.07 |
-04:47:26.4 |
HIP 65243 |
35.32 |
| 2026-09-26 12:00 |
13:20:10.15 |
-04:49:31.0 |
HIP 65243 |
31.76 |
| 2026-09-27 00:00 |
13:20:27.27 |
-04:51:35.7 |
HIP 65243 |
28.53 |
| 2026-09-27 12:00 |
13:20:44.42 |
-04:53:40.4 |
HIP 65243 |
25.76 |
| 2026-09-28 00:00 |
13:21:01.61 |
-04:55:45.1 |
HIP 65243 |
23.63 |
| 2026-09-28 12:00 |
13:21:18.83 |
-04:57:49.9 |
HIP 65243 |
22.32 |
| 2026-09-29 00:00 |
13:21:36.08 |
-04:59:54.7 |
HIP 65243 |
21.99 |
| 2026-09-29 12:00 |
13:21:53.37 |
-05:01:59.5 |
HIP 65323 |
22.28 |
| 2026-09-30 00:00 |
13:22:10.69 |
-05:04:04.4 |
HIP 65323 |
19.05 |
| 2026-09-30 12:00 |
13:22:28.04 |
-05:06:09.2 |
HIP 65323 |
16.58 |
| 2026-10-01 00:00 |
13:22:45.43 |
-05:08:14.1 |
HIP 65323 |
15.25 |
| 2026-10-01 12:00 |
13:23:02.84 |
-05:10:19.0 |
HIP 65379 |
13.40 |
| 2026-10-02 00:00 |
13:23:20.28 |
-05:12:24.0 |
HIP 65379 |
9.63 |
| 2026-10-02 12:00 |
13:23:37.76 |
-05:14:28.9 |
HIP 65379 |
7.24 |
| 2026-10-03 00:00 |
13:23:55.26 |
-05:16:33.8 |
HIP 65379 |
7.65 |
| 2026-10-03 12:00 |
13:24:12.79 |
-05:18:38.7 |
HIP 65420 |
10.16 |
| 2026-10-04 00:00 |
13:24:30.35 |
-05:20:43.7 |
HIP 65420 |
10.91 |
| 2026-10-04 12:00 |
13:24:47.93 |
-05:22:48.6 |
HIP 65420 |
13.49 |
| 2026-10-05 00:00 |
13:25:05.55 |
-05:24:53.5 |
HIP 65420 |
17.08 |
| 2026-10-05 12:00 |
13:25:23.19 |
-05:26:58.4 |
HIP 65420 |
21.19 |
| 2026-10-06 00:00 |
13:25:40.85 |
-05:29:03.2 |
HIP 65420 |
25.56 |
| 2026-10-06 12:00 |
13:25:58.54 |
-05:31:08.1 |
HIP 65590 |
28.24 |
| 2026-10-07 00:00 |
13:26:16.26 |
-05:33:12.9 |
HIP 65590 |
24.45 |
| 2026-10-07 12:00 |
13:26:34.00 |
-05:35:17.7 |
HIP 65590 |
21.11 |
| 2026-10-08 00:00 |
13:26:51.76 |
-05:37:22.4 |
HIP 65590 |
18.47 |
| 2026-10-08 12:00 |
13:27:09.54 |
-05:39:27.2 |
HIP 65590 |
16.87 |
| 2026-10-09 00:00 |
13:27:27.34 |
-05:41:31.8 |
HIP 65590 |
16.60 |
| 2026-10-09 12:00 |
13:27:45.17 |
-05:43:36.4 |
HIP 65590 |
17.74 |
| 2026-10-10 00:00 |
13:28:03.02 |
-05:45:41.0 |
HIP 65772 |
18.89 |
| 2026-10-10 12:00 |
13:28:20.88 |
-05:47:45.5 |
HIP 65772 |
14.15 |
| 2026-10-11 00:00 |
13:28:38.77 |
-05:49:49.9 |
HIP 65772 |
9.59 |