メタデータ
| 項目 |
値 |
| Designation |
C/1961 O1 (Wilson-Hubbard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1961-07-17T11:55:51.530880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
8 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1961-09-23.0000000 |
| e |
0.99991912 |
| q (au) |
0.040125 |
| a (au) |
496.136062 |
| i (deg) |
24.212158 |
| Ω (om, deg) |
298.943557 |
| ω (w, deg) |
270.697744 |
| M (ma, deg) |
0.006020 |
等級
散乱 + 全体線形
$$
M_a = (9.581 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.581 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
01:02:54.81 |
+33:04:48.8 |
HIP 4908 |
14.58 |
| 2026-07-29 12:00 |
01:02:54.34 |
+33:04:54.9 |
HIP 4908 |
14.48 |
| 2026-07-30 00:00 |
01:02:53.85 |
+33:05:00.9 |
HIP 4908 |
14.39 |
| 2026-07-30 12:00 |
01:02:53.35 |
+33:05:06.9 |
HIP 4908 |
14.29 |
| 2026-07-31 00:00 |
01:02:52.84 |
+33:05:12.8 |
HIP 4908 |
14.20 |
| 2026-07-31 12:00 |
01:02:52.32 |
+33:05:18.6 |
HIP 4908 |
14.11 |
| 2026-08-01 00:00 |
01:02:51.79 |
+33:05:24.3 |
HIP 4908 |
14.02 |
| 2026-08-01 12:00 |
01:02:51.24 |
+33:05:29.9 |
HIP 4908 |
13.94 |
| 2026-08-02 00:00 |
01:02:50.68 |
+33:05:35.5 |
HIP 4908 |
13.86 |
| 2026-08-02 12:00 |
01:02:50.12 |
+33:05:41.0 |
HIP 4908 |
13.78 |
| 2026-08-03 00:00 |
01:02:49.54 |
+33:05:46.4 |
HIP 4908 |
13.70 |
| 2026-08-03 12:00 |
01:02:48.95 |
+33:05:51.7 |
HIP 4908 |
13.63 |
| 2026-08-04 00:00 |
01:02:48.34 |
+33:05:57.0 |
HIP 4908 |
13.56 |
| 2026-08-04 12:00 |
01:02:47.73 |
+33:06:02.1 |
HIP 4908 |
13.49 |
| 2026-08-05 00:00 |
01:02:47.10 |
+33:06:07.2 |
HIP 4908 |
13.43 |
| 2026-08-05 12:00 |
01:02:46.47 |
+33:06:12.2 |
HIP 4908 |
13.37 |
| 2026-08-06 00:00 |
01:02:45.82 |
+33:06:17.1 |
HIP 4908 |
13.31 |
| 2026-08-06 12:00 |
01:02:45.16 |
+33:06:21.9 |
HIP 4908 |
13.25 |
| 2026-08-07 00:00 |
01:02:44.49 |
+33:06:26.7 |
HIP 4908 |
13.20 |
| 2026-08-07 12:00 |
01:02:43.81 |
+33:06:31.3 |
HIP 4908 |
13.16 |
| 2026-08-08 00:00 |
01:02:43.12 |
+33:06:35.9 |
HIP 4908 |
13.11 |
| 2026-08-08 12:00 |
01:02:42.41 |
+33:06:40.4 |
HIP 4908 |
13.07 |
| 2026-08-09 00:00 |
01:02:41.70 |
+33:06:44.8 |
HIP 4908 |
13.04 |
| 2026-08-09 12:00 |
01:02:40.97 |
+33:06:49.1 |
HIP 4908 |
13.01 |
| 2026-08-10 00:00 |
01:02:40.23 |
+33:06:53.3 |
HIP 4908 |
12.98 |
| 2026-08-10 12:00 |
01:02:39.49 |
+33:06:57.4 |
HIP 4908 |
12.96 |
| 2026-08-11 00:00 |
01:02:38.73 |
+33:07:01.5 |
HIP 4908 |
12.94 |
| 2026-08-11 12:00 |
01:02:37.96 |
+33:07:05.4 |
HIP 4908 |
12.92 |
| 2026-08-12 00:00 |
01:02:37.18 |
+33:07:09.3 |
HIP 4908 |
12.91 |
| 2026-08-12 12:00 |
01:02:36.39 |
+33:07:13.1 |
HIP 4908 |
12.91 |
| 2026-08-13 00:00 |
01:02:35.58 |
+33:07:16.7 |
HIP 4908 |
12.91 |
| 2026-08-13 12:00 |
01:02:34.77 |
+33:07:20.3 |
HIP 4908 |
12.91 |
| 2026-08-14 00:00 |
01:02:33.95 |
+33:07:23.9 |
HIP 4908 |
12.92 |
| 2026-08-14 12:00 |
01:02:33.11 |
+33:07:27.3 |
HIP 4908 |
12.93 |
| 2026-08-15 00:00 |
01:02:32.27 |
+33:07:30.6 |
HIP 4908 |
12.95 |
| 2026-08-15 12:00 |
01:02:31.42 |
+33:07:33.8 |
HIP 4908 |
12.98 |
| 2026-08-16 00:00 |
01:02:30.55 |
+33:07:37.0 |
HIP 4908 |
13.00 |
| 2026-08-16 12:00 |
01:02:29.68 |
+33:07:40.0 |
HIP 4908 |
13.04 |
| 2026-08-17 00:00 |
01:02:28.79 |
+33:07:43.0 |
HIP 4908 |
13.08 |
| 2026-08-17 12:00 |
01:02:27.90 |
+33:07:45.8 |
HIP 4908 |
13.12 |
| 2026-08-18 00:00 |
01:02:26.99 |
+33:07:48.6 |
HIP 4908 |
13.17 |
| 2026-08-18 12:00 |
01:02:26.07 |
+33:07:51.3 |
HIP 4908 |
13.22 |
| 2026-08-19 00:00 |
01:02:25.15 |
+33:07:53.9 |
HIP 4908 |
13.28 |