メタデータ
| 項目 |
値 |
| Designation |
C/1991 T2 (Shoemaker-Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1992-07-24T12:09:31.147200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:41Z |
| Obs used |
212 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
10.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1992-03-10.0000000 |
| e |
0.99986094 |
| q (au) |
0.836262 |
| a (au) |
6013.613507 |
| i (deg) |
113.496746 |
| Ω (om, deg) |
49.049164 |
| ω (w, deg) |
145.238453 |
| M (ma, deg) |
359.999711 |
等級
散乱 + 全体線形
$$
M_a = (8.493 + 3.615\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.493 |
| n |
3.615 |
| gf |
0.800 |
| gb |
-0.594 |
| k |
0.800 |
| δ90 |
2.404 |
| 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 |
| 1991-10-06 |
1992-04-05 |
+3.9104 |
-1.690 |
| 1992-04-05 |
1992-07-24 |
-0.6095 |
+0.014 |
| 1992-07-24 |
1992-08-19 |
+3.5301 |
+0.260 |
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 |
05:08:02.15 |
-19:59:24.5 |
HIP 23888 |
7.87 |
| 2026-06-01 12:00 |
05:08:04.21 |
-19:59:19.2 |
HIP 23888 |
8.00 |
| 2026-06-02 00:00 |
05:08:06.27 |
-19:59:14.1 |
HIP 23888 |
8.15 |
| 2026-06-02 12:00 |
05:08:08.33 |
-19:59:09.2 |
HIP 23888 |
8.33 |
| 2026-06-03 00:00 |
05:08:10.39 |
-19:59:04.4 |
HIP 23888 |
8.53 |
| 2026-06-03 12:00 |
05:08:12.45 |
-19:58:59.8 |
HIP 23888 |
8.74 |
| 2026-06-04 00:00 |
05:08:14.52 |
-19:58:55.4 |
HIP 23888 |
8.98 |
| 2026-06-04 12:00 |
05:08:16.59 |
-19:58:51.1 |
HIP 23888 |
9.24 |
| 2026-06-05 00:00 |
05:08:18.66 |
-19:58:47.0 |
HIP 23888 |
9.51 |
| 2026-06-05 12:00 |
05:08:20.73 |
-19:58:43.1 |
HIP 23888 |
9.80 |
| 2026-06-06 00:00 |
05:08:22.80 |
-19:58:39.4 |
HIP 23888 |
10.10 |
| 2026-06-06 12:00 |
05:08:24.87 |
-19:58:35.8 |
HIP 23888 |
10.41 |
| 2026-06-07 00:00 |
05:08:26.95 |
-19:58:32.4 |
HIP 23888 |
10.73 |
| 2026-06-07 12:00 |
05:08:29.02 |
-19:58:29.1 |
HIP 23888 |
11.07 |
| 2026-06-08 00:00 |
05:08:31.09 |
-19:58:26.0 |
HIP 23888 |
11.41 |
| 2026-06-08 12:00 |
05:08:33.17 |
-19:58:23.1 |
HIP 23888 |
11.76 |
| 2026-06-09 00:00 |
05:08:35.24 |
-19:58:20.4 |
HIP 23888 |
12.12 |
| 2026-06-09 12:00 |
05:08:37.32 |
-19:58:17.8 |
HIP 23888 |
12.48 |
| 2026-06-10 00:00 |
05:08:39.40 |
-19:58:15.4 |
HIP 23888 |
12.86 |
| 2026-06-10 12:00 |
05:08:41.47 |
-19:58:13.2 |
HIP 23888 |
13.23 |
| 2026-06-11 00:00 |
05:08:43.54 |
-19:58:11.1 |
HIP 23888 |
13.62 |
| 2026-06-11 12:00 |
05:08:45.62 |
-19:58:09.2 |
HIP 23888 |
14.00 |
| 2026-06-12 00:00 |
05:08:47.69 |
-19:58:07.5 |
HIP 23888 |
14.40 |
| 2026-06-12 12:00 |
05:08:49.77 |
-19:58:06.0 |
HIP 23888 |
14.79 |
| 2026-06-13 00:00 |
05:08:51.84 |
-19:58:04.6 |
HIP 23888 |
15.19 |
| 2026-06-13 12:00 |
05:08:53.91 |
-19:58:03.4 |
HIP 23888 |
15.59 |
| 2026-06-14 00:00 |
05:08:55.98 |
-19:58:02.4 |
HIP 23888 |
16.00 |
| 2026-06-14 12:00 |
05:08:58.05 |
-19:58:01.5 |
HIP 23888 |
16.40 |
| 2026-06-15 00:00 |
05:09:00.11 |
-19:58:00.9 |
HIP 23888 |
16.81 |
| 2026-06-15 12:00 |
05:09:02.18 |
-19:58:00.4 |
HIP 23888 |
17.22 |
| 2026-06-16 00:00 |
05:09:04.24 |
-19:58:00.0 |
HIP 23888 |
17.64 |
| 2026-06-16 12:00 |
05:09:06.30 |
-19:57:59.8 |
HIP 23888 |
18.05 |
| 2026-06-17 00:00 |
05:09:08.36 |
-19:57:59.9 |
HIP 23888 |
18.47 |
| 2026-06-17 12:00 |
05:09:10.42 |
-19:58:00.0 |
HIP 23888 |
18.89 |
| 2026-06-18 00:00 |
05:09:12.47 |
-19:58:00.4 |
HIP 24086 |
19.23 |
| 2026-06-18 12:00 |
05:09:14.52 |
-19:58:00.9 |
HIP 24086 |
18.78 |
| 2026-06-19 00:00 |
05:09:16.57 |
-19:58:01.6 |
HIP 24086 |
18.34 |
| 2026-06-19 12:00 |
05:09:18.62 |
-19:58:02.5 |
HIP 24086 |
17.89 |
| 2026-06-20 00:00 |
05:09:20.66 |
-19:58:03.5 |
HIP 24086 |
17.45 |
| 2026-06-20 12:00 |
05:09:22.70 |
-19:58:04.7 |
HIP 24086 |
17.01 |
| 2026-06-21 00:00 |
05:09:24.74 |
-19:58:06.1 |
HIP 24086 |
16.57 |
| 2026-06-21 12:00 |
05:09:26.77 |
-19:58:07.6 |
HIP 24086 |
16.14 |
| 2026-06-22 00:00 |
05:09:28.80 |
-19:58:09.3 |
HIP 24086 |
15.70 |