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) |
| 2026-09-20 00:00 |
22:00:23.69 |
-44:37:19.9 |
HIP 108665 |
10.84 |
| 2026-09-20 12:00 |
22:00:21.17 |
-44:37:20.2 |
HIP 108665 |
11.06 |
| 2026-09-21 00:00 |
22:00:18.67 |
-44:37:20.2 |
HIP 108665 |
11.29 |
| 2026-09-21 12:00 |
22:00:16.18 |
-44:37:20.1 |
HIP 108665 |
11.53 |
| 2026-09-22 00:00 |
22:00:13.71 |
-44:37:19.8 |
HIP 108665 |
11.78 |
| 2026-09-22 12:00 |
22:00:11.24 |
-44:37:19.4 |
HIP 108665 |
12.03 |
| 2026-09-23 00:00 |
22:00:08.79 |
-44:37:18.8 |
HIP 108665 |
12.30 |
| 2026-09-23 12:00 |
22:00:06.36 |
-44:37:18.0 |
HIP 108665 |
12.56 |
| 2026-09-24 00:00 |
22:00:03.94 |
-44:37:17.0 |
HIP 108665 |
12.84 |
| 2026-09-24 12:00 |
22:00:01.53 |
-44:37:15.9 |
HIP 108665 |
13.11 |
| 2026-09-25 00:00 |
21:59:59.14 |
-44:37:14.5 |
HIP 108665 |
13.40 |
| 2026-09-25 12:00 |
21:59:56.76 |
-44:37:13.1 |
HIP 108665 |
13.68 |
| 2026-09-26 00:00 |
21:59:54.39 |
-44:37:11.4 |
HIP 108665 |
13.97 |
| 2026-09-26 12:00 |
21:59:52.04 |
-44:37:09.6 |
HIP 108665 |
14.26 |
| 2026-09-27 00:00 |
21:59:49.70 |
-44:37:07.6 |
HIP 108665 |
14.56 |
| 2026-09-27 12:00 |
21:59:47.38 |
-44:37:05.4 |
HIP 108665 |
14.85 |
| 2026-09-28 00:00 |
21:59:45.08 |
-44:37:03.1 |
HIP 108665 |
15.15 |
| 2026-09-28 12:00 |
21:59:42.79 |
-44:37:00.6 |
HIP 108665 |
15.45 |
| 2026-09-29 00:00 |
21:59:40.51 |
-44:36:57.9 |
HIP 108475 |
15.23 |
| 2026-09-29 12:00 |
21:59:38.25 |
-44:36:55.0 |
HIP 108475 |
14.92 |
| 2026-09-30 00:00 |
21:59:36.01 |
-44:36:52.0 |
HIP 108475 |
14.62 |
| 2026-09-30 12:00 |
21:59:33.78 |
-44:36:48.9 |
HIP 108475 |
14.33 |
| 2026-10-01 00:00 |
21:59:31.57 |
-44:36:45.5 |
HIP 108475 |
14.05 |
| 2026-10-01 12:00 |
21:59:29.38 |
-44:36:42.0 |
HIP 108475 |
13.78 |
| 2026-10-02 00:00 |
21:59:27.20 |
-44:36:38.3 |
HIP 108475 |
13.52 |
| 2026-10-02 12:00 |
21:59:25.04 |
-44:36:34.4 |
HIP 108475 |
13.27 |
| 2026-10-03 00:00 |
21:59:22.89 |
-44:36:30.4 |
HIP 108475 |
13.04 |
| 2026-10-03 12:00 |
21:59:20.76 |
-44:36:26.2 |
HIP 108475 |
12.81 |
| 2026-10-04 00:00 |
21:59:18.65 |
-44:36:21.9 |
HIP 108475 |
12.59 |
| 2026-10-04 12:00 |
21:59:16.56 |
-44:36:17.3 |
HIP 108475 |
12.39 |
| 2026-10-05 00:00 |
21:59:14.48 |
-44:36:12.7 |
HIP 108475 |
12.20 |
| 2026-10-05 12:00 |
21:59:12.42 |
-44:36:07.8 |
HIP 108475 |
12.02 |
| 2026-10-06 00:00 |
21:59:10.38 |
-44:36:02.8 |
HIP 108475 |
11.86 |
| 2026-10-06 12:00 |
21:59:08.36 |
-44:35:57.6 |
HIP 108475 |
11.71 |
| 2026-10-07 00:00 |
21:59:06.35 |
-44:35:52.2 |
HIP 108475 |
11.57 |
| 2026-10-07 12:00 |
21:59:04.37 |
-44:35:46.7 |
HIP 108475 |
11.45 |
| 2026-10-08 00:00 |
21:59:02.40 |
-44:35:41.0 |
HIP 108475 |
11.34 |
| 2026-10-08 12:00 |
21:59:00.45 |
-44:35:35.2 |
HIP 108475 |
11.25 |
| 2026-10-09 00:00 |
21:58:58.52 |
-44:35:29.2 |
HIP 108475 |
11.17 |
| 2026-10-09 12:00 |
21:58:56.61 |
-44:35:23.0 |
HIP 108475 |
11.11 |
| 2026-10-10 00:00 |
21:58:54.72 |
-44:35:16.7 |
HIP 108475 |
11.06 |
| 2026-10-10 12:00 |
21:58:52.84 |
-44:35:10.2 |
HIP 108475 |
11.03 |
| 2026-10-11 00:00 |
21:58:50.99 |
-44:35:03.6 |
HIP 108475 |
11.01 |