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) |
| 2026-07-29 00:00 |
05:11:39.96 |
-20:07:43.0 |
HIP 24086 |
17.10 |
| 2026-07-29 12:00 |
05:11:41.36 |
-20:07:56.3 |
HIP 24086 |
17.45 |
| 2026-07-30 00:00 |
05:11:42.74 |
-20:08:09.7 |
HIP 24086 |
17.81 |
| 2026-07-30 12:00 |
05:11:44.11 |
-20:08:23.3 |
HIP 24086 |
18.16 |
| 2026-07-31 00:00 |
05:11:45.47 |
-20:08:36.9 |
HIP 24086 |
18.51 |
| 2026-07-31 12:00 |
05:11:46.82 |
-20:08:50.7 |
HIP 24086 |
18.86 |
| 2026-08-01 00:00 |
05:11:48.15 |
-20:09:04.7 |
HIP 24086 |
19.21 |
| 2026-08-01 12:00 |
05:11:49.47 |
-20:09:18.7 |
HIP 24086 |
19.55 |
| 2026-08-02 00:00 |
05:11:50.77 |
-20:09:32.9 |
HIP 24086 |
19.90 |
| 2026-08-02 12:00 |
05:11:52.07 |
-20:09:47.2 |
HIP 24086 |
20.25 |
| 2026-08-03 00:00 |
05:11:53.34 |
-20:10:01.6 |
HIP 24086 |
20.59 |
| 2026-08-03 12:00 |
05:11:54.61 |
-20:10:16.1 |
HIP 24086 |
20.93 |
| 2026-08-04 00:00 |
05:11:55.86 |
-20:10:30.8 |
HIP 24086 |
21.27 |
| 2026-08-04 12:00 |
05:11:57.10 |
-20:10:45.6 |
HIP 24086 |
21.61 |
| 2026-08-05 00:00 |
05:11:58.32 |
-20:11:00.5 |
HIP 24086 |
21.95 |
| 2026-08-05 12:00 |
05:11:59.53 |
-20:11:15.5 |
HIP 24086 |
22.29 |
| 2026-08-06 00:00 |
05:12:00.72 |
-20:11:30.6 |
HIP 24086 |
22.62 |
| 2026-08-06 12:00 |
05:12:01.90 |
-20:11:45.9 |
HIP 24086 |
22.96 |
| 2026-08-07 00:00 |
05:12:03.07 |
-20:12:01.3 |
HIP 24086 |
23.29 |
| 2026-08-07 12:00 |
05:12:04.22 |
-20:12:16.7 |
HIP 24086 |
23.62 |
| 2026-08-08 00:00 |
05:12:05.36 |
-20:12:32.3 |
HIP 24086 |
23.95 |
| 2026-08-08 12:00 |
05:12:06.48 |
-20:12:48.0 |
HIP 24086 |
24.28 |
| 2026-08-09 00:00 |
05:12:07.59 |
-20:13:03.9 |
HIP 24086 |
24.61 |
| 2026-08-09 12:00 |
05:12:08.68 |
-20:13:19.8 |
HIP 24086 |
24.93 |
| 2026-08-10 00:00 |
05:12:09.76 |
-20:13:35.8 |
HIP 24086 |
25.26 |
| 2026-08-10 12:00 |
05:12:10.82 |
-20:13:52.0 |
HIP 24343 |
25.39 |
| 2026-08-11 00:00 |
05:12:11.87 |
-20:14:08.2 |
HIP 24343 |
25.03 |
| 2026-08-11 12:00 |
05:12:12.90 |
-20:14:24.6 |
HIP 24343 |
24.66 |
| 2026-08-12 00:00 |
05:12:13.91 |
-20:14:41.0 |
HIP 24343 |
24.30 |
| 2026-08-12 12:00 |
05:12:14.92 |
-20:14:57.6 |
HIP 24343 |
23.94 |
| 2026-08-13 00:00 |
05:12:15.90 |
-20:15:14.3 |
HIP 24343 |
23.58 |
| 2026-08-13 12:00 |
05:12:16.87 |
-20:15:31.0 |
HIP 24343 |
23.22 |
| 2026-08-14 00:00 |
05:12:17.82 |
-20:15:47.9 |
HIP 24343 |
22.86 |
| 2026-08-14 12:00 |
05:12:18.76 |
-20:16:04.9 |
HIP 24343 |
22.51 |
| 2026-08-15 00:00 |
05:12:19.68 |
-20:16:21.9 |
HIP 24343 |
22.16 |
| 2026-08-15 12:00 |
05:12:20.59 |
-20:16:39.1 |
HIP 24343 |
21.80 |
| 2026-08-16 00:00 |
05:12:21.48 |
-20:16:56.3 |
HIP 24343 |
21.45 |
| 2026-08-16 12:00 |
05:12:22.36 |
-20:17:13.7 |
HIP 24343 |
21.11 |
| 2026-08-17 00:00 |
05:12:23.21 |
-20:17:31.1 |
HIP 24343 |
20.76 |
| 2026-08-17 12:00 |
05:12:24.06 |
-20:17:48.6 |
HIP 24343 |
20.42 |
| 2026-08-18 00:00 |
05:12:24.88 |
-20:18:06.3 |
HIP 24343 |
20.07 |
| 2026-08-18 12:00 |
05:12:25.69 |
-20:18:24.0 |
HIP 24343 |
19.73 |
| 2026-08-19 00:00 |
05:12:26.48 |
-20:18:41.8 |
HIP 24343 |
19.40 |