C/1966 T1 (Rudnicki)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/1966 T1 (Rudnicki) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1967-01-20T21:13:46.761600Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:29:17Z |
| Obs used | 49 |
| NEO | - |
| M1 | 10.100 |
| K1 | 11.000 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 1966-11-19.0000000 |
| e | 1.00039019 |
| q (au) | 0.419209 |
| a (au) | -1074.385463 |
| i (deg) | 9.079808 |
| Ω (om, deg) | 75.708464 |
| ω (w, deg) | 79.785459 |
| M (ma, deg) | -0.001760 |
等級
散乱 + 全体線形
$$ M_a = (9.738 + 2.616\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 9.738 |
| n | 2.616 |
| gf | 0.800 |
| gb | -0.500 |
| k | 1.000 |
| δ90 | 1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) | 終了日 (UTC) | a | b |
|---|---|---|---|
| 1966-10-20 | 1966-12-03 | +4.4444 | -0.492 |
| 1966-12-03 | 1967-01-04 | -6.0437 | -0.279 |
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 | 22:11:10.25 | -20:31:31.2 | HIP 109438 | 30.64 |
| 2026-07-29 12:00 | 22:11:09.02 | -20:31:39.0 | HIP 109438 | 30.41 |
| 2026-07-30 00:00 | 22:11:07.78 | -20:31:46.9 | HIP 109438 | 30.18 |
| 2026-07-30 12:00 | 22:11:06.54 | -20:31:54.7 | HIP 109438 | 29.95 |
| 2026-07-31 00:00 | 22:11:05.30 | -20:32:02.5 | HIP 109438 | 29.72 |
| 2026-07-31 12:00 | 22:11:04.05 | -20:32:10.4 | HIP 109438 | 29.49 |
| 2026-08-01 00:00 | 22:11:02.80 | -20:32:18.2 | HIP 109438 | 29.26 |
| 2026-08-01 12:00 | 22:11:01.54 | -20:32:26.0 | HIP 109438 | 29.03 |
| 2026-08-02 00:00 | 22:11:00.28 | -20:32:33.8 | HIP 109438 | 28.81 |
| 2026-08-02 12:00 | 22:10:59.01 | -20:32:41.6 | HIP 109438 | 28.59 |
| 2026-08-03 00:00 | 22:10:57.74 | -20:32:49.4 | HIP 109438 | 28.37 |
| 2026-08-03 12:00 | 22:10:56.46 | -20:32:57.2 | HIP 109438 | 28.15 |
| 2026-08-04 00:00 | 22:10:55.19 | -20:33:05.0 | HIP 109438 | 27.93 |
| 2026-08-04 12:00 | 22:10:53.90 | -20:33:12.8 | HIP 109438 | 27.72 |
| 2026-08-05 00:00 | 22:10:52.62 | -20:33:20.6 | HIP 109438 | 27.50 |
| 2026-08-05 12:00 | 22:10:51.32 | -20:33:28.4 | HIP 109438 | 27.29 |
| 2026-08-06 00:00 | 22:10:50.03 | -20:33:36.2 | HIP 109438 | 27.08 |
| 2026-08-06 12:00 | 22:10:48.73 | -20:33:43.9 | HIP 109438 | 26.88 |
| 2026-08-07 00:00 | 22:10:47.43 | -20:33:51.7 | HIP 109438 | 26.67 |
| 2026-08-07 12:00 | 22:10:46.13 | -20:33:59.4 | HIP 109438 | 26.47 |
| 2026-08-08 00:00 | 22:10:44.82 | -20:34:07.1 | HIP 109438 | 26.27 |
| 2026-08-08 12:00 | 22:10:43.51 | -20:34:14.9 | HIP 109438 | 26.07 |
| 2026-08-09 00:00 | 22:10:42.19 | -20:34:22.6 | HIP 109438 | 25.88 |
| 2026-08-09 12:00 | 22:10:40.87 | -20:34:30.3 | HIP 109438 | 25.69 |
| 2026-08-10 00:00 | 22:10:39.55 | -20:34:38.0 | HIP 109438 | 25.50 |
| 2026-08-10 12:00 | 22:10:38.23 | -20:34:45.6 | HIP 109438 | 25.32 |
| 2026-08-11 00:00 | 22:10:36.90 | -20:34:53.3 | HIP 109438 | 25.14 |
| 2026-08-11 12:00 | 22:10:35.57 | -20:35:00.9 | HIP 109438 | 24.96 |
| 2026-08-12 00:00 | 22:10:34.24 | -20:35:08.5 | HIP 109438 | 24.79 |
| 2026-08-12 12:00 | 22:10:32.91 | -20:35:16.2 | HIP 109438 | 24.61 |
| 2026-08-13 00:00 | 22:10:31.57 | -20:35:23.7 | HIP 109438 | 24.45 |
| 2026-08-13 12:00 | 22:10:30.24 | -20:35:31.3 | HIP 109438 | 24.28 |
| 2026-08-14 00:00 | 22:10:28.90 | -20:35:38.9 | HIP 109438 | 24.12 |
| 2026-08-14 12:00 | 22:10:27.55 | -20:35:46.4 | HIP 109438 | 23.97 |
| 2026-08-15 00:00 | 22:10:26.21 | -20:35:53.9 | HIP 109438 | 23.82 |
| 2026-08-15 12:00 | 22:10:24.86 | -20:36:01.4 | HIP 109438 | 23.67 |
| 2026-08-16 00:00 | 22:10:23.52 | -20:36:08.9 | HIP 109438 | 23.53 |
| 2026-08-16 12:00 | 22:10:22.17 | -20:36:16.4 | HIP 109438 | 23.39 |
| 2026-08-17 00:00 | 22:10:20.82 | -20:36:23.8 | HIP 109438 | 23.25 |
| 2026-08-17 12:00 | 22:10:19.46 | -20:36:31.2 | HIP 109438 | 23.12 |
| 2026-08-18 00:00 | 22:10:18.11 | -20:36:38.6 | HIP 109438 | 23.00 |
| 2026-08-18 12:00 | 22:10:16.76 | -20:36:46.0 | HIP 109438 | 22.88 |
| 2026-08-19 00:00 | 22:10:15.40 | -20:36:53.3 | HIP 109438 | 22.76 |