C/1994 E2 (Shoemaker-Levy)
メタデータ
| 項目 |
値 |
| Designation |
C/1994 E2 (Shoemaker-Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-05-27T11:01:08.918400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
8.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1994-04-25.0000000 |
| e |
0.99730528 |
| q (au) |
1.158819 |
| a (au) |
430.033553 |
| i (deg) |
131.254567 |
| Ω (om, deg) |
166.568608 |
| ω (w, deg) |
57.496463 |
| M (ma, deg) |
359.996413 |
等級
散乱 + 全体線形
$$
M_a = (13.233 + 5.007\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.233 |
| n |
5.007 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.994 |
| 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) |
| 2026-02-03 00:00 |
22:01:57.20 |
-43:25:43.5 |
HIP 108854 |
17.38 |
| 2026-02-03 12:00 |
22:01:59.88 |
-43:25:30.7 |
HIP 108854 |
16.88 |
| 2026-02-04 00:00 |
22:02:02.57 |
-43:25:18.0 |
HIP 108854 |
16.38 |
| 2026-02-04 12:00 |
22:02:05.27 |
-43:25:05.4 |
HIP 108854 |
15.88 |
| 2026-02-05 00:00 |
22:02:07.97 |
-43:24:53.0 |
HIP 108854 |
15.39 |
| 2026-02-05 12:00 |
22:02:10.68 |
-43:24:40.6 |
HIP 108854 |
14.90 |
| 2026-02-06 00:00 |
22:02:13.39 |
-43:24:28.4 |
HIP 108854 |
14.41 |
| 2026-02-06 12:00 |
22:02:16.11 |
-43:24:16.4 |
HIP 108854 |
13.93 |
| 2026-02-07 00:00 |
22:02:18.83 |
-43:24:04.4 |
HIP 108854 |
13.45 |
| 2026-02-07 12:00 |
22:02:21.55 |
-43:23:52.6 |
HIP 108854 |
12.98 |
| 2026-02-08 00:00 |
22:02:24.28 |
-43:23:40.9 |
HIP 108854 |
12.51 |
| 2026-02-08 12:00 |
22:02:27.01 |
-43:23:29.3 |
HIP 108854 |
12.05 |
| 2026-02-09 00:00 |
22:02:29.75 |
-43:23:17.9 |
HIP 108854 |
11.60 |
| 2026-02-09 12:00 |
22:02:32.49 |
-43:23:06.5 |
HIP 108854 |
11.16 |
| 2026-02-10 00:00 |
22:02:35.23 |
-43:22:55.4 |
HIP 108854 |
10.72 |
| 2026-02-10 12:00 |
22:02:37.98 |
-43:22:44.3 |
HIP 108854 |
10.30 |
| 2026-02-11 00:00 |
22:02:40.73 |
-43:22:33.4 |
HIP 108854 |
9.89 |
| 2026-02-11 12:00 |
22:02:43.48 |
-43:22:22.6 |
HIP 108854 |
9.50 |
| 2026-02-12 00:00 |
22:02:46.23 |
-43:22:11.9 |
HIP 108854 |
9.11 |
| 2026-02-12 12:00 |
22:02:48.99 |
-43:22:01.4 |
HIP 108854 |
8.75 |
| 2026-02-13 00:00 |
22:02:51.74 |
-43:21:51.0 |
HIP 108854 |
8.41 |
| 2026-02-13 12:00 |
22:02:54.50 |
-43:21:40.8 |
HIP 108854 |
8.09 |
| 2026-02-14 00:00 |
22:02:57.26 |
-43:21:30.7 |
HIP 108854 |
7.79 |
| 2026-02-14 12:00 |
22:03:00.03 |
-43:21:20.7 |
HIP 108854 |
7.52 |
| 2026-02-15 00:00 |
22:03:02.79 |
-43:21:10.9 |
HIP 108854 |
7.29 |
| 2026-02-15 12:00 |
22:03:05.55 |
-43:21:01.2 |
HIP 108854 |
7.08 |
| 2026-02-16 00:00 |
22:03:08.32 |
-43:20:51.6 |
HIP 108854 |
6.92 |
| 2026-02-16 12:00 |
22:03:11.08 |
-43:20:42.2 |
HIP 108854 |
6.79 |
| 2026-02-17 00:00 |
22:03:13.85 |
-43:20:33.0 |
HIP 108854 |
6.71 |
| 2026-02-17 12:00 |
22:03:16.62 |
-43:20:23.9 |
HIP 108854 |
6.67 |
| 2026-02-18 00:00 |
22:03:19.38 |
-43:20:14.9 |
HIP 108854 |
6.67 |
| 2026-02-18 12:00 |
22:03:22.15 |
-43:20:06.0 |
HIP 108854 |
6.71 |
| 2026-02-19 00:00 |
22:03:24.91 |
-43:19:57.4 |
HIP 108854 |
6.80 |
| 2026-02-19 12:00 |
22:03:27.67 |
-43:19:48.8 |
HIP 108854 |
6.93 |
| 2026-02-20 00:00 |
22:03:30.44 |
-43:19:40.4 |
HIP 108854 |
7.09 |
| 2026-02-20 12:00 |
22:03:33.20 |
-43:19:32.2 |
HIP 108854 |
7.30 |
| 2026-02-21 00:00 |
22:03:35.96 |
-43:19:24.1 |
HIP 108854 |
7.53 |
| 2026-02-21 12:00 |
22:03:38.72 |
-43:19:16.1 |
HIP 108854 |
7.79 |
| 2026-02-22 00:00 |
22:03:41.47 |
-43:19:08.3 |
HIP 108854 |
8.08 |
| 2026-02-22 12:00 |
22:03:44.23 |
-43:19:00.7 |
HIP 108854 |
8.39 |
| 2026-02-23 00:00 |
22:03:46.98 |
-43:18:53.2 |
HIP 108854 |
8.73 |
| 2026-02-23 12:00 |
22:03:49.73 |
-43:18:45.8 |
HIP 108854 |
9.08 |
| 2026-02-24 00:00 |
22:03:52.48 |
-43:18:38.6 |
HIP 108854 |
9.45 |