C/1961 O1 (Wilson-Hubbard)
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) |
| 2026-02-03 00:00 |
00:57:38.67 |
+32:26:19.2 |
HIP 4575 |
13.18 |
| 2026-02-03 12:00 |
00:57:39.37 |
+32:26:14.6 |
HIP 4575 |
13.08 |
| 2026-02-04 00:00 |
00:57:40.09 |
+32:26:10.0 |
HIP 4575 |
12.99 |
| 2026-02-04 12:00 |
00:57:40.81 |
+32:26:05.5 |
HIP 4575 |
12.89 |
| 2026-02-05 00:00 |
00:57:41.55 |
+32:26:01.2 |
HIP 4575 |
12.79 |
| 2026-02-05 12:00 |
00:57:42.30 |
+32:25:56.9 |
HIP 4575 |
12.69 |
| 2026-02-06 00:00 |
00:57:43.06 |
+32:25:52.7 |
HIP 4575 |
12.59 |
| 2026-02-06 12:00 |
00:57:43.83 |
+32:25:48.6 |
HIP 4575 |
12.48 |
| 2026-02-07 00:00 |
00:57:44.61 |
+32:25:44.6 |
HIP 4575 |
12.38 |
| 2026-02-07 12:00 |
00:57:45.40 |
+32:25:40.7 |
HIP 4575 |
12.27 |
| 2026-02-08 00:00 |
00:57:46.21 |
+32:25:36.9 |
HIP 4575 |
12.16 |
| 2026-02-08 12:00 |
00:57:47.02 |
+32:25:33.2 |
HIP 4575 |
12.06 |
| 2026-02-09 00:00 |
00:57:47.85 |
+32:25:29.6 |
HIP 4575 |
11.95 |
| 2026-02-09 12:00 |
00:57:48.68 |
+32:25:26.1 |
HIP 4575 |
11.84 |
| 2026-02-10 00:00 |
00:57:49.53 |
+32:25:22.6 |
HIP 4575 |
11.73 |
| 2026-02-10 12:00 |
00:57:50.38 |
+32:25:19.3 |
HIP 4575 |
11.62 |
| 2026-02-11 00:00 |
00:57:51.25 |
+32:25:16.1 |
HIP 4575 |
11.50 |
| 2026-02-11 12:00 |
00:57:52.13 |
+32:25:12.9 |
HIP 4575 |
11.39 |
| 2026-02-12 00:00 |
00:57:53.01 |
+32:25:09.9 |
HIP 4575 |
11.28 |
| 2026-02-12 12:00 |
00:57:53.91 |
+32:25:06.9 |
HIP 4575 |
11.16 |
| 2026-02-13 00:00 |
00:57:54.82 |
+32:25:04.1 |
HIP 4575 |
11.05 |
| 2026-02-13 12:00 |
00:57:55.73 |
+32:25:01.3 |
HIP 4575 |
10.94 |
| 2026-02-14 00:00 |
00:57:56.66 |
+32:24:58.7 |
HIP 4575 |
10.82 |
| 2026-02-14 12:00 |
00:57:57.60 |
+32:24:56.1 |
HIP 4575 |
10.71 |
| 2026-02-15 00:00 |
00:57:58.55 |
+32:24:53.7 |
HIP 4575 |
10.59 |
| 2026-02-15 12:00 |
00:57:59.50 |
+32:24:51.3 |
HIP 4575 |
10.48 |
| 2026-02-16 00:00 |
00:58:00.47 |
+32:24:49.1 |
HIP 4575 |
10.36 |
| 2026-02-16 12:00 |
00:58:01.44 |
+32:24:46.9 |
HIP 4575 |
10.25 |
| 2026-02-17 00:00 |
00:58:02.43 |
+32:24:44.8 |
HIP 4575 |
10.14 |
| 2026-02-17 12:00 |
00:58:03.43 |
+32:24:42.9 |
HIP 4575 |
10.02 |
| 2026-02-18 00:00 |
00:58:04.43 |
+32:24:41.0 |
HIP 4575 |
9.91 |
| 2026-02-18 12:00 |
00:58:05.44 |
+32:24:39.2 |
HIP 4575 |
9.80 |
| 2026-02-19 00:00 |
00:58:06.47 |
+32:24:37.5 |
HIP 4575 |
9.69 |
| 2026-02-19 12:00 |
00:58:07.50 |
+32:24:36.0 |
HIP 4575 |
9.58 |
| 2026-02-20 00:00 |
00:58:08.54 |
+32:24:34.5 |
HIP 4575 |
9.47 |
| 2026-02-20 12:00 |
00:58:09.59 |
+32:24:33.1 |
HIP 4575 |
9.37 |
| 2026-02-21 00:00 |
00:58:10.65 |
+32:24:31.8 |
HIP 4575 |
9.26 |
| 2026-02-21 12:00 |
00:58:11.71 |
+32:24:30.7 |
HIP 4575 |
9.16 |
| 2026-02-22 00:00 |
00:58:12.79 |
+32:24:29.6 |
HIP 4575 |
9.06 |
| 2026-02-22 12:00 |
00:58:13.87 |
+32:24:28.6 |
HIP 4575 |
8.96 |
| 2026-02-23 00:00 |
00:58:14.97 |
+32:24:27.7 |
HIP 4575 |
8.87 |
| 2026-02-23 12:00 |
00:58:16.07 |
+32:24:26.9 |
HIP 4575 |
8.78 |
| 2026-02-24 00:00 |
00:58:17.18 |
+32:24:26.2 |
HIP 4575 |
8.69 |