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) |
| 2026-05-12 00:00 |
01:01:46.49 |
+32:39:28.8 |
HIP 4612 |
35.82 |
| 2026-05-12 12:00 |
01:01:47.70 |
+32:39:39.3 |
HIP 4612 |
36.11 |
| 2026-05-13 00:00 |
01:01:48.90 |
+32:39:49.9 |
HIP 4612 |
36.41 |
| 2026-05-13 12:00 |
01:01:50.10 |
+32:40:00.5 |
HIP 4612 |
36.71 |
| 2026-05-14 00:00 |
01:01:51.28 |
+32:40:11.1 |
HIP 4612 |
37.00 |
| 2026-05-14 12:00 |
01:01:52.46 |
+32:40:21.7 |
HIP 4612 |
37.30 |
| 2026-05-15 00:00 |
01:01:53.63 |
+32:40:32.4 |
HIP 4612 |
37.59 |
| 2026-05-15 12:00 |
01:01:54.80 |
+32:40:43.0 |
HIP 4612 |
37.88 |
| 2026-05-16 00:00 |
01:01:55.96 |
+32:40:53.7 |
HIP 4612 |
38.17 |
| 2026-05-16 12:00 |
01:01:57.11 |
+32:41:04.5 |
HIP 4612 |
38.46 |
| 2026-05-17 00:00 |
01:01:58.25 |
+32:41:15.2 |
HIP 4612 |
38.75 |
| 2026-05-17 12:00 |
01:01:59.39 |
+32:41:26.0 |
HIP 4612 |
39.04 |
| 2026-05-18 00:00 |
01:02:00.51 |
+32:41:36.8 |
HIP 4612 |
39.32 |
| 2026-05-18 12:00 |
01:02:01.63 |
+32:41:47.6 |
HIP 4908 |
39.34 |
| 2026-05-19 00:00 |
01:02:02.75 |
+32:41:58.4 |
HIP 4908 |
39.10 |
| 2026-05-19 12:00 |
01:02:03.85 |
+32:42:09.3 |
HIP 4908 |
38.86 |
| 2026-05-20 00:00 |
01:02:04.94 |
+32:42:20.1 |
HIP 4908 |
38.62 |
| 2026-05-20 12:00 |
01:02:06.03 |
+32:42:31.0 |
HIP 4908 |
38.39 |
| 2026-05-21 00:00 |
01:02:07.11 |
+32:42:41.9 |
HIP 4908 |
38.15 |
| 2026-05-21 12:00 |
01:02:08.18 |
+32:42:52.8 |
HIP 4908 |
37.91 |
| 2026-05-22 00:00 |
01:02:09.25 |
+32:43:03.7 |
HIP 4908 |
37.68 |
| 2026-05-22 12:00 |
01:02:10.30 |
+32:43:14.7 |
HIP 4908 |
37.44 |
| 2026-05-23 00:00 |
01:02:11.35 |
+32:43:25.6 |
HIP 4908 |
37.21 |
| 2026-05-23 12:00 |
01:02:12.38 |
+32:43:36.6 |
HIP 4908 |
36.98 |
| 2026-05-24 00:00 |
01:02:13.41 |
+32:43:47.5 |
HIP 4908 |
36.75 |
| 2026-05-24 12:00 |
01:02:14.43 |
+32:43:58.5 |
HIP 4908 |
36.52 |
| 2026-05-25 00:00 |
01:02:15.44 |
+32:44:09.5 |
HIP 4908 |
36.29 |
| 2026-05-25 12:00 |
01:02:16.45 |
+32:44:20.5 |
HIP 4908 |
36.06 |
| 2026-05-26 00:00 |
01:02:17.44 |
+32:44:31.5 |
HIP 4908 |
35.83 |
| 2026-05-26 12:00 |
01:02:18.42 |
+32:44:42.5 |
HIP 4908 |
35.61 |
| 2026-05-27 00:00 |
01:02:19.40 |
+32:44:53.6 |
HIP 4908 |
35.38 |
| 2026-05-27 12:00 |
01:02:20.37 |
+32:45:04.6 |
HIP 4908 |
35.16 |
| 2026-05-28 00:00 |
01:02:21.32 |
+32:45:15.6 |
HIP 4908 |
34.94 |
| 2026-05-28 12:00 |
01:02:22.27 |
+32:45:26.6 |
HIP 4908 |
34.71 |
| 2026-05-29 00:00 |
01:02:23.21 |
+32:45:37.7 |
HIP 4908 |
34.49 |
| 2026-05-29 12:00 |
01:02:24.14 |
+32:45:48.7 |
HIP 4908 |
34.27 |
| 2026-05-30 00:00 |
01:02:25.06 |
+32:45:59.8 |
HIP 4908 |
34.05 |
| 2026-05-30 12:00 |
01:02:25.97 |
+32:46:10.8 |
HIP 4908 |
33.84 |
| 2026-05-31 00:00 |
01:02:26.88 |
+32:46:21.9 |
HIP 4908 |
33.62 |
| 2026-05-31 12:00 |
01:02:27.77 |
+32:46:32.9 |
HIP 4908 |
33.40 |
| 2026-06-01 00:00 |
01:02:28.65 |
+32:46:44.0 |
HIP 4908 |
33.19 |
| 2026-06-01 12:00 |
01:02:29.52 |
+32:46:55.0 |
HIP 4908 |
32.98 |
| 2026-06-02 00:00 |
01:02:30.39 |
+32:47:06.0 |
HIP 4908 |
32.76 |