メタデータ
| 項目 |
値 |
| Designation |
C/1968 U1 (Wild) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1968-03-30T21:16:07.515840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
15 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1968-10-24.0000000 |
| e |
0.99993577 |
| q (au) |
2.603057 |
| a (au) |
40525.056308 |
| i (deg) |
135.132950 |
| Ω (om, deg) |
209.215253 |
| ω (w, deg) |
101.490599 |
| M (ma, deg) |
0.000025 |
等級
散乱 + 全体線形
$$
M_a = (10.654 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.654 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-0.912 |
| k |
0.800 |
| δ90 |
7.619 |
| 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) |
| 2026-07-29 00:00 |
22:26:47.04 |
-58:47:58.1 |
HIP 110777 |
5.02 |
| 2026-07-29 12:00 |
22:26:44.71 |
-58:48:10.8 |
HIP 110777 |
4.72 |
| 2026-07-30 00:00 |
22:26:42.38 |
-58:48:23.4 |
HIP 110777 |
4.43 |
| 2026-07-30 12:00 |
22:26:40.03 |
-58:48:35.9 |
HIP 110777 |
4.16 |
| 2026-07-31 00:00 |
22:26:37.67 |
-58:48:48.3 |
HIP 110777 |
3.91 |
| 2026-07-31 12:00 |
22:26:35.31 |
-58:49:00.6 |
HIP 110777 |
3.67 |
| 2026-08-01 00:00 |
22:26:32.93 |
-58:49:12.8 |
HIP 110777 |
3.46 |
| 2026-08-01 12:00 |
22:26:30.54 |
-58:49:24.8 |
HIP 110777 |
3.28 |
| 2026-08-02 00:00 |
22:26:28.14 |
-58:49:36.8 |
HIP 110777 |
3.14 |
| 2026-08-02 12:00 |
22:26:25.73 |
-58:49:48.7 |
HIP 110777 |
3.04 |
| 2026-08-03 00:00 |
22:26:23.31 |
-58:50:00.4 |
HIP 110777 |
2.98 |
| 2026-08-03 12:00 |
22:26:20.89 |
-58:50:12.0 |
HIP 110777 |
2.97 |
| 2026-08-04 00:00 |
22:26:18.45 |
-58:50:23.6 |
HIP 110777 |
3.00 |
| 2026-08-04 12:00 |
22:26:16.00 |
-58:50:35.0 |
HIP 110777 |
3.08 |
| 2026-08-05 00:00 |
22:26:13.55 |
-58:50:46.3 |
HIP 110777 |
3.21 |
| 2026-08-05 12:00 |
22:26:11.09 |
-58:50:57.5 |
HIP 110777 |
3.37 |
| 2026-08-06 00:00 |
22:26:08.61 |
-58:51:08.5 |
HIP 110777 |
3.57 |
| 2026-08-06 12:00 |
22:26:06.13 |
-58:51:19.5 |
HIP 110777 |
3.79 |
| 2026-08-07 00:00 |
22:26:03.64 |
-58:51:30.3 |
HIP 110777 |
4.04 |
| 2026-08-07 12:00 |
22:26:01.15 |
-58:51:41.1 |
HIP 110777 |
4.30 |
| 2026-08-08 00:00 |
22:25:58.64 |
-58:51:51.7 |
HIP 110777 |
4.58 |
| 2026-08-08 12:00 |
22:25:56.13 |
-58:52:02.1 |
HIP 110777 |
4.88 |
| 2026-08-09 00:00 |
22:25:53.61 |
-58:52:12.5 |
HIP 110777 |
5.18 |
| 2026-08-09 12:00 |
22:25:51.08 |
-58:52:22.8 |
HIP 110777 |
5.49 |
| 2026-08-10 00:00 |
22:25:48.54 |
-58:52:32.9 |
HIP 110777 |
5.81 |
| 2026-08-10 12:00 |
22:25:46.00 |
-58:52:42.9 |
HIP 110777 |
6.14 |
| 2026-08-11 00:00 |
22:25:43.45 |
-58:52:52.8 |
HIP 110777 |
6.47 |
| 2026-08-11 12:00 |
22:25:40.90 |
-58:53:02.5 |
HIP 110777 |
6.81 |
| 2026-08-12 00:00 |
22:25:38.33 |
-58:53:12.2 |
HIP 110777 |
7.15 |
| 2026-08-12 12:00 |
22:25:35.76 |
-58:53:21.7 |
HIP 110777 |
7.49 |
| 2026-08-13 00:00 |
22:25:33.19 |
-58:53:31.0 |
HIP 110777 |
7.84 |
| 2026-08-13 12:00 |
22:25:30.61 |
-58:53:40.3 |
HIP 110777 |
8.19 |
| 2026-08-14 00:00 |
22:25:28.02 |
-58:53:49.4 |
HIP 110777 |
8.54 |
| 2026-08-14 12:00 |
22:25:25.43 |
-58:53:58.4 |
HIP 110777 |
8.89 |
| 2026-08-15 00:00 |
22:25:22.84 |
-58:54:07.3 |
HIP 110777 |
9.24 |
| 2026-08-15 12:00 |
22:25:20.23 |
-58:54:16.0 |
HIP 110777 |
9.60 |
| 2026-08-16 00:00 |
22:25:17.63 |
-58:54:24.6 |
HIP 110777 |
9.96 |
| 2026-08-16 12:00 |
22:25:15.02 |
-58:54:33.1 |
HIP 110777 |
10.31 |
| 2026-08-17 00:00 |
22:25:12.40 |
-58:54:41.4 |
HIP 110777 |
10.67 |
| 2026-08-17 12:00 |
22:25:09.78 |
-58:54:49.6 |
HIP 110777 |
11.03 |
| 2026-08-18 00:00 |
22:25:07.16 |
-58:54:57.7 |
HIP 110777 |
11.39 |
| 2026-08-18 12:00 |
22:25:04.53 |
-58:55:05.7 |
HIP 110777 |
11.74 |
| 2026-08-19 00:00 |
22:25:01.90 |
-58:55:13.5 |
HIP 110777 |
12.10 |