181P/Shoemaker-Levy 6
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) |
| 2026-02-03 00:00 |
13:37:16.15 |
-03:07:58.4 |
HIP 66482 |
9.87 |
| 2026-02-03 12:00 |
13:37:13.98 |
-03:07:31.9 |
HIP 66482 |
10.57 |
| 2026-02-04 00:00 |
13:37:11.65 |
-03:07:04.6 |
HIP 66482 |
11.30 |
| 2026-02-04 12:00 |
13:37:09.17 |
-03:06:36.4 |
HIP 66482 |
12.08 |
| 2026-02-05 00:00 |
13:37:06.53 |
-03:06:07.4 |
HIP 66482 |
12.90 |
| 2026-02-05 12:00 |
13:37:03.74 |
-03:05:37.6 |
HIP 66482 |
13.75 |
| 2026-02-06 00:00 |
13:37:00.79 |
-03:05:06.9 |
HIP 66369 |
13.71 |
| 2026-02-06 12:00 |
13:36:57.68 |
-03:04:35.4 |
HIP 66369 |
12.77 |
| 2026-02-07 00:00 |
13:36:54.42 |
-03:04:03.0 |
HIP 66369 |
11.80 |
| 2026-02-07 12:00 |
13:36:51.00 |
-03:03:29.9 |
HIP 66369 |
10.80 |
| 2026-02-08 00:00 |
13:36:47.42 |
-03:02:55.9 |
HIP 66369 |
9.76 |
| 2026-02-08 12:00 |
13:36:43.69 |
-03:02:21.0 |
HIP 66369 |
8.68 |
| 2026-02-09 00:00 |
13:36:39.80 |
-03:01:45.4 |
HIP 66369 |
7.57 |
| 2026-02-09 12:00 |
13:36:35.76 |
-03:01:08.9 |
HIP 66369 |
6.44 |
| 2026-02-10 00:00 |
13:36:31.56 |
-03:00:31.7 |
HIP 66369 |
5.29 |
| 2026-02-10 12:00 |
13:36:27.20 |
-02:59:53.6 |
HIP 66369 |
4.15 |
| 2026-02-11 00:00 |
13:36:22.68 |
-02:59:14.7 |
HIP 66369 |
3.08 |
| 2026-02-11 12:00 |
13:36:18.01 |
-02:58:35.0 |
HIP 66369 |
2.26 |
| 2026-02-12 00:00 |
13:36:13.18 |
-02:57:54.5 |
HIP 66369 |
2.09 |
| 2026-02-12 12:00 |
13:36:08.20 |
-02:57:13.2 |
HIP 66369 |
2.76 |
| 2026-02-13 00:00 |
13:36:03.06 |
-02:56:31.1 |
HIP 66369 |
3.90 |
| 2026-02-13 12:00 |
13:35:57.76 |
-02:55:48.3 |
HIP 66369 |
5.24 |
| 2026-02-14 00:00 |
13:35:52.31 |
-02:55:04.6 |
HIP 66369 |
6.70 |
| 2026-02-14 12:00 |
13:35:46.70 |
-02:54:20.2 |
HIP 66369 |
8.22 |
| 2026-02-15 00:00 |
13:35:40.93 |
-02:53:34.9 |
HIP 66369 |
9.81 |
| 2026-02-15 12:00 |
13:35:35.01 |
-02:52:49.0 |
HIP 66369 |
11.45 |
| 2026-02-16 00:00 |
13:35:28.94 |
-02:52:02.2 |
HIP 66369 |
13.13 |
| 2026-02-16 12:00 |
13:35:22.71 |
-02:51:14.7 |
HIP 66369 |
14.86 |
| 2026-02-17 00:00 |
13:35:16.33 |
-02:50:26.4 |
HIP 66293 |
16.06 |
| 2026-02-17 12:00 |
13:35:09.79 |
-02:49:37.4 |
HIP 66293 |
15.25 |
| 2026-02-18 00:00 |
13:35:03.10 |
-02:48:47.6 |
HIP 66293 |
14.62 |
| 2026-02-18 12:00 |
13:34:56.26 |
-02:47:57.1 |
HIP 66293 |
14.21 |
| 2026-02-19 00:00 |
13:34:49.27 |
-02:47:05.9 |
HIP 66293 |
14.06 |
| 2026-02-19 12:00 |
13:34:42.12 |
-02:46:13.9 |
HIP 66293 |
14.18 |
| 2026-02-20 00:00 |
13:34:34.82 |
-02:45:21.3 |
HIP 66293 |
14.59 |
| 2026-02-20 12:00 |
13:34:27.38 |
-02:44:27.9 |
HIP 66293 |
15.27 |
| 2026-02-21 00:00 |
13:34:19.78 |
-02:43:33.8 |
HIP 66293 |
16.22 |
| 2026-02-21 12:00 |
13:34:12.03 |
-02:42:39.0 |
HIP 66293 |
17.40 |
| 2026-02-22 00:00 |
13:34:04.13 |
-02:41:43.5 |
HIP 66293 |
18.78 |
| 2026-02-22 12:00 |
13:33:56.09 |
-02:40:47.3 |
HIP 66293 |
20.33 |
| 2026-02-23 00:00 |
13:33:47.90 |
-02:39:50.5 |
HIP 66097 |
19.16 |
| 2026-02-23 12:00 |
13:33:39.56 |
-02:38:52.9 |
HIP 66097 |
17.09 |
| 2026-02-24 00:00 |
13:33:31.08 |
-02:37:54.7 |
HIP 66097 |
15.06 |