メタデータ
| 項目 |
値 |
| Designation |
C/1993 K1 (Shoemaker-Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-02-02T01:24:00.826560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:46Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1994-07-30.0000000 |
| e |
1.00011336 |
| q (au) |
4.849378 |
| a (au) |
-42777.594887 |
| i (deg) |
67.766845 |
| Ω (om, deg) |
30.328734 |
| ω (w, deg) |
232.460115 |
| M (ma, deg) |
0.000020 |
等級
散乱 + 全体線形
$$
M_a = (11.159 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.159 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.538 |
| k |
0.800 |
| 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) |
| 2026-03-26 00:00 |
01:53:14.32 |
+28:19:20.8 |
HIP 8806 |
18.03 |
| 2026-03-26 12:00 |
01:53:16.46 |
+28:19:28.7 |
HIP 8806 |
18.19 |
| 2026-03-27 00:00 |
01:53:18.61 |
+28:19:36.7 |
HIP 8806 |
18.36 |
| 2026-03-27 12:00 |
01:53:20.77 |
+28:19:44.8 |
HIP 8806 |
18.54 |
| 2026-03-28 00:00 |
01:53:22.94 |
+28:19:53.0 |
HIP 8806 |
18.73 |
| 2026-03-28 12:00 |
01:53:25.11 |
+28:20:01.4 |
HIP 8806 |
18.94 |
| 2026-03-29 00:00 |
01:53:27.30 |
+28:20:09.8 |
HIP 8806 |
19.16 |
| 2026-03-29 12:00 |
01:53:29.48 |
+28:20:18.4 |
HIP 8806 |
19.40 |
| 2026-03-30 00:00 |
01:53:31.68 |
+28:20:27.0 |
HIP 8806 |
19.64 |
| 2026-03-30 12:00 |
01:53:33.89 |
+28:20:35.8 |
HIP 8806 |
19.90 |
| 2026-03-31 00:00 |
01:53:36.10 |
+28:20:44.7 |
HIP 8806 |
20.17 |
| 2026-03-31 12:00 |
01:53:38.31 |
+28:20:53.7 |
HIP 8806 |
20.45 |
| 2026-04-01 00:00 |
01:53:40.54 |
+28:21:02.8 |
HIP 8806 |
20.74 |
| 2026-04-01 12:00 |
01:53:42.77 |
+28:21:12.0 |
HIP 8806 |
21.04 |
| 2026-04-02 00:00 |
01:53:45.00 |
+28:21:21.3 |
HIP 8806 |
21.36 |
| 2026-04-02 12:00 |
01:53:47.25 |
+28:21:30.7 |
HIP 8806 |
21.68 |
| 2026-04-03 00:00 |
01:53:49.50 |
+28:21:40.2 |
HIP 8806 |
22.01 |
| 2026-04-03 12:00 |
01:53:51.75 |
+28:21:49.8 |
HIP 8806 |
22.35 |
| 2026-04-04 00:00 |
01:53:54.01 |
+28:21:59.5 |
HIP 8806 |
22.70 |
| 2026-04-04 12:00 |
01:53:56.28 |
+28:22:09.3 |
HIP 8806 |
23.06 |
| 2026-04-05 00:00 |
01:53:58.55 |
+28:22:19.3 |
HIP 8806 |
23.43 |
| 2026-04-05 12:00 |
01:54:00.82 |
+28:22:29.3 |
HIP 8806 |
23.80 |
| 2026-04-06 00:00 |
01:54:03.11 |
+28:22:39.4 |
HIP 8806 |
24.19 |
| 2026-04-06 12:00 |
01:54:05.39 |
+28:22:49.6 |
HIP 8806 |
24.58 |
| 2026-04-07 00:00 |
01:54:07.68 |
+28:23:00.0 |
HIP 8806 |
24.97 |
| 2026-04-07 12:00 |
01:54:09.98 |
+28:23:10.4 |
HIP 8806 |
25.38 |
| 2026-04-08 00:00 |
01:54:12.28 |
+28:23:20.9 |
HIP 8806 |
25.79 |
| 2026-04-08 12:00 |
01:54:14.59 |
+28:23:31.5 |
HIP 8806 |
26.21 |
| 2026-04-09 00:00 |
01:54:16.90 |
+28:23:42.2 |
HIP 8938 |
26.59 |
| 2026-04-09 12:00 |
01:54:19.21 |
+28:23:53.0 |
HIP 8938 |
26.22 |
| 2026-04-10 00:00 |
01:54:21.53 |
+28:24:03.9 |
HIP 8938 |
25.85 |
| 2026-04-10 12:00 |
01:54:23.85 |
+28:24:14.9 |
HIP 8938 |
25.49 |
| 2026-04-11 00:00 |
01:54:26.17 |
+28:24:26.0 |
HIP 8938 |
25.13 |
| 2026-04-11 12:00 |
01:54:28.50 |
+28:24:37.2 |
HIP 8938 |
24.77 |
| 2026-04-12 00:00 |
01:54:30.83 |
+28:24:48.5 |
HIP 8938 |
24.42 |
| 2026-04-12 12:00 |
01:54:33.17 |
+28:24:59.9 |
HIP 8938 |
24.08 |
| 2026-04-13 00:00 |
01:54:35.50 |
+28:25:11.3 |
HIP 8938 |
23.74 |
| 2026-04-13 12:00 |
01:54:37.84 |
+28:25:22.9 |
HIP 8938 |
23.41 |
| 2026-04-14 00:00 |
01:54:40.18 |
+28:25:34.5 |
HIP 8938 |
23.09 |
| 2026-04-14 12:00 |
01:54:42.53 |
+28:25:46.3 |
HIP 8938 |
22.77 |
| 2026-04-15 00:00 |
01:54:44.88 |
+28:25:58.1 |
HIP 8938 |
22.46 |
| 2026-04-15 12:00 |
01:54:47.23 |
+28:26:10.0 |
HIP 8938 |
22.16 |
| 2026-04-16 00:00 |
01:54:49.58 |
+28:26:22.0 |
HIP 8938 |
21.86 |