メタデータ
| 項目 |
値 |
| Designation |
C/1991 B1 (Shoemaker-Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1991-12-31T04:34:48.403200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:40Z |
| Obs used |
429 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
9.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1992-05-14.0000000 |
| e |
0.99357570 |
| q (au) |
2.265069 |
| a (au) |
352.578443 |
| i (deg) |
77.287941 |
| Ω (om, deg) |
145.130159 |
| ω (w, deg) |
74.368785 |
| M (ma, deg) |
0.020070 |
等級
散乱 + 全体線形
$$
M_a = (3.371 + 5.121\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.371 |
| n |
5.121 |
| gf |
0.999 |
| gb |
-0.836 |
| k |
1.000 |
| δ90 |
9.998 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1991-01-13 |
1991-04-17 |
+6.2454 |
-3.858 |
| 1991-04-17 |
1991-12-31 |
-2.7201 |
+1.245 |
| 1992-01-01 |
1992-06-26 |
+4.1272 |
-1.528 |
| 1992-06-26 |
1993-10-08 |
-3.5694 |
+1.839 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:48:42.21 |
-51:26:12.7 |
HIP 3556 |
32.26 |
| 2026-06-01 12:00 |
00:48:44.00 |
-51:26:31.4 |
HIP 3556 |
32.41 |
| 2026-06-02 00:00 |
00:48:45.76 |
-51:26:50.3 |
HIP 3556 |
32.56 |
| 2026-06-02 12:00 |
00:48:47.51 |
-51:27:09.4 |
HIP 3556 |
32.71 |
| 2026-06-03 00:00 |
00:48:49.23 |
-51:27:28.6 |
HIP 3556 |
32.86 |
| 2026-06-03 12:00 |
00:48:50.93 |
-51:27:48.0 |
HIP 3556 |
33.02 |
| 2026-06-04 00:00 |
00:48:52.61 |
-51:28:07.5 |
HIP 3556 |
33.17 |
| 2026-06-04 12:00 |
00:48:54.26 |
-51:28:27.3 |
HIP 3556 |
33.32 |
| 2026-06-05 00:00 |
00:48:55.90 |
-51:28:47.1 |
HIP 3556 |
33.48 |
| 2026-06-05 12:00 |
00:48:57.51 |
-51:29:07.2 |
HIP 3556 |
33.63 |
| 2026-06-06 00:00 |
00:48:59.10 |
-51:29:27.4 |
HIP 3556 |
33.79 |
| 2026-06-06 12:00 |
00:49:00.67 |
-51:29:47.7 |
HIP 3556 |
33.94 |
| 2026-06-07 00:00 |
00:49:02.22 |
-51:30:08.2 |
HIP 4105 |
34.07 |
| 2026-06-07 12:00 |
00:49:03.74 |
-51:30:28.9 |
HIP 4105 |
33.80 |
| 2026-06-08 00:00 |
00:49:05.24 |
-51:30:49.7 |
HIP 4105 |
33.54 |
| 2026-06-08 12:00 |
00:49:06.72 |
-51:31:10.6 |
HIP 4105 |
33.29 |
| 2026-06-09 00:00 |
00:49:08.18 |
-51:31:31.8 |
HIP 4105 |
33.05 |
| 2026-06-09 12:00 |
00:49:09.61 |
-51:31:53.0 |
HIP 4105 |
32.81 |
| 2026-06-10 00:00 |
00:49:11.02 |
-51:32:14.4 |
HIP 4105 |
32.58 |
| 2026-06-10 12:00 |
00:49:12.41 |
-51:32:36.0 |
HIP 4105 |
32.35 |
| 2026-06-11 00:00 |
00:49:13.77 |
-51:32:57.7 |
HIP 4105 |
32.13 |
| 2026-06-11 12:00 |
00:49:15.11 |
-51:33:19.5 |
HIP 4105 |
31.93 |
| 2026-06-12 00:00 |
00:49:16.43 |
-51:33:41.5 |
HIP 4105 |
31.72 |
| 2026-06-12 12:00 |
00:49:17.72 |
-51:34:03.6 |
HIP 4105 |
31.53 |
| 2026-06-13 00:00 |
00:49:18.99 |
-51:34:25.9 |
HIP 4105 |
31.35 |
| 2026-06-13 12:00 |
00:49:20.24 |
-51:34:48.3 |
HIP 4105 |
31.17 |
| 2026-06-14 00:00 |
00:49:21.46 |
-51:35:10.8 |
HIP 4105 |
31.00 |
| 2026-06-14 12:00 |
00:49:22.66 |
-51:35:33.5 |
HIP 4105 |
30.84 |
| 2026-06-15 00:00 |
00:49:23.83 |
-51:35:56.3 |
HIP 4105 |
30.69 |
| 2026-06-15 12:00 |
00:49:24.98 |
-51:36:19.2 |
HIP 4105 |
30.55 |
| 2026-06-16 00:00 |
00:49:26.11 |
-51:36:42.3 |
HIP 4105 |
30.42 |
| 2026-06-16 12:00 |
00:49:27.21 |
-51:37:05.5 |
HIP 4105 |
30.30 |
| 2026-06-17 00:00 |
00:49:28.29 |
-51:37:28.8 |
HIP 4105 |
30.19 |
| 2026-06-17 12:00 |
00:49:29.34 |
-51:37:52.2 |
HIP 4105 |
30.08 |
| 2026-06-18 00:00 |
00:49:30.37 |
-51:38:15.8 |
HIP 4105 |
29.99 |
| 2026-06-18 12:00 |
00:49:31.37 |
-51:38:39.4 |
HIP 4105 |
29.91 |
| 2026-06-19 00:00 |
00:49:32.35 |
-51:39:03.2 |
HIP 4105 |
29.83 |
| 2026-06-19 12:00 |
00:49:33.30 |
-51:39:27.2 |
HIP 4105 |
29.77 |
| 2026-06-20 00:00 |
00:49:34.23 |
-51:39:51.2 |
HIP 4105 |
29.72 |
| 2026-06-20 12:00 |
00:49:35.13 |
-51:40:15.3 |
HIP 4105 |
29.67 |
| 2026-06-21 00:00 |
00:49:36.01 |
-51:40:39.6 |
HIP 4105 |
29.64 |
| 2026-06-21 12:00 |
00:49:36.87 |
-51:41:04.0 |
HIP 4105 |
29.62 |
| 2026-06-22 00:00 |
00:49:37.70 |
-51:41:28.4 |
HIP 4105 |
29.61 |