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) |
| 2026-07-29 00:00 |
22:05:18.82 |
-44:21:26.8 |
HIP 109106 |
13.38 |
| 2026-07-29 12:00 |
22:05:16.17 |
-44:21:43.2 |
HIP 109106 |
13.46 |
| 2026-07-30 00:00 |
22:05:13.51 |
-44:21:59.5 |
HIP 109106 |
13.55 |
| 2026-07-30 12:00 |
22:05:10.84 |
-44:22:15.6 |
HIP 109106 |
13.67 |
| 2026-07-31 00:00 |
22:05:08.16 |
-44:22:31.7 |
HIP 109106 |
13.81 |
| 2026-07-31 12:00 |
22:05:05.48 |
-44:22:47.7 |
HIP 109106 |
13.97 |
| 2026-08-01 00:00 |
22:05:02.78 |
-44:23:03.5 |
HIP 109106 |
14.16 |
| 2026-08-01 12:00 |
22:05:00.08 |
-44:23:19.2 |
HIP 109106 |
14.37 |
| 2026-08-02 00:00 |
22:04:57.36 |
-44:23:34.8 |
HIP 109106 |
14.59 |
| 2026-08-02 12:00 |
22:04:54.64 |
-44:23:50.3 |
HIP 109106 |
14.84 |
| 2026-08-03 00:00 |
22:04:51.91 |
-44:24:05.7 |
HIP 109106 |
15.11 |
| 2026-08-03 12:00 |
22:04:49.17 |
-44:24:21.0 |
HIP 109106 |
15.39 |
| 2026-08-04 00:00 |
22:04:46.43 |
-44:24:36.1 |
HIP 109106 |
15.69 |
| 2026-08-04 12:00 |
22:04:43.67 |
-44:24:51.1 |
HIP 109106 |
16.00 |
| 2026-08-05 00:00 |
22:04:40.91 |
-44:25:06.1 |
HIP 109106 |
16.33 |
| 2026-08-05 12:00 |
22:04:38.15 |
-44:25:20.8 |
HIP 109106 |
16.67 |
| 2026-08-06 00:00 |
22:04:35.37 |
-44:25:35.5 |
HIP 109106 |
17.02 |
| 2026-08-06 12:00 |
22:04:32.59 |
-44:25:50.0 |
HIP 109106 |
17.39 |
| 2026-08-07 00:00 |
22:04:29.80 |
-44:26:04.4 |
HIP 109106 |
17.77 |
| 2026-08-07 12:00 |
22:04:27.00 |
-44:26:18.7 |
HIP 109106 |
18.16 |
| 2026-08-08 00:00 |
22:04:24.20 |
-44:26:32.9 |
HIP 109106 |
18.56 |
| 2026-08-08 12:00 |
22:04:21.39 |
-44:26:46.9 |
HIP 109106 |
18.97 |
| 2026-08-09 00:00 |
22:04:18.58 |
-44:27:00.8 |
HIP 109106 |
19.38 |
| 2026-08-09 12:00 |
22:04:15.76 |
-44:27:14.5 |
HIP 109106 |
19.81 |
| 2026-08-10 00:00 |
22:04:12.93 |
-44:27:28.2 |
HIP 109106 |
20.24 |
| 2026-08-10 12:00 |
22:04:10.10 |
-44:27:41.6 |
HIP 109106 |
20.68 |
| 2026-08-11 00:00 |
22:04:07.26 |
-44:27:55.0 |
HIP 109106 |
21.13 |
| 2026-08-11 12:00 |
22:04:04.42 |
-44:28:08.2 |
HIP 109106 |
21.58 |
| 2026-08-12 00:00 |
22:04:01.58 |
-44:28:21.3 |
HIP 109106 |
22.04 |
| 2026-08-12 12:00 |
22:03:58.73 |
-44:28:34.3 |
HIP 109106 |
22.50 |
| 2026-08-13 00:00 |
22:03:55.87 |
-44:28:47.1 |
HIP 109106 |
22.97 |
| 2026-08-13 12:00 |
22:03:53.02 |
-44:28:59.7 |
HIP 109106 |
23.45 |
| 2026-08-14 00:00 |
22:03:50.15 |
-44:29:12.2 |
HIP 109106 |
23.92 |
| 2026-08-14 12:00 |
22:03:47.29 |
-44:29:24.6 |
HIP 109106 |
24.40 |
| 2026-08-15 00:00 |
22:03:44.42 |
-44:29:36.9 |
HIP 109106 |
24.89 |
| 2026-08-15 12:00 |
22:03:41.55 |
-44:29:49.0 |
HIP 109106 |
25.38 |
| 2026-08-16 00:00 |
22:03:38.68 |
-44:30:00.9 |
HIP 109106 |
25.87 |
| 2026-08-16 12:00 |
22:03:35.80 |
-44:30:12.7 |
HIP 109106 |
26.36 |
| 2026-08-17 00:00 |
22:03:32.92 |
-44:30:24.4 |
HIP 109106 |
26.86 |
| 2026-08-17 12:00 |
22:03:30.04 |
-44:30:35.9 |
HIP 109106 |
27.36 |
| 2026-08-18 00:00 |
22:03:27.16 |
-44:30:47.2 |
HIP 108665 |
27.79 |
| 2026-08-18 12:00 |
22:03:24.28 |
-44:30:58.4 |
HIP 108665 |
27.30 |
| 2026-08-19 00:00 |
22:03:21.39 |
-44:31:09.5 |
HIP 108665 |
26.81 |