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 | -1.000 |
| 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) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 22:11:27.41 | -20:18:46.5 | HIP 109391 | 35.51 |
| 2026-03-26 12:00 | 22:11:28.57 | -20:18:42.2 | HIP 109391 | 35.65 |
| 2026-03-27 00:00 | 22:11:29.71 | -20:18:38.0 | HIP 109391 | 35.79 |
| 2026-03-27 12:00 | 22:11:30.86 | -20:18:33.9 | HIP 109391 | 35.93 |
| 2026-03-28 00:00 | 22:11:31.99 | -20:18:29.8 | HIP 109391 | 36.07 |
| 2026-03-28 12:00 | 22:11:33.12 | -20:18:25.8 | HIP 109391 | 36.21 |
| 2026-03-29 00:00 | 22:11:34.24 | -20:18:21.9 | HIP 109391 | 36.36 |
| 2026-03-29 12:00 | 22:11:35.35 | -20:18:18.0 | HIP 109391 | 36.50 |
| 2026-03-30 00:00 | 22:11:36.45 | -20:18:14.1 | HIP 109391 | 36.65 |
| 2026-03-30 12:00 | 22:11:37.55 | -20:18:10.3 | HIP 109391 | 36.80 |
| 2026-03-31 00:00 | 22:11:38.64 | -20:18:06.6 | HIP 109391 | 36.95 |
| 2026-03-31 12:00 | 22:11:39.73 | -20:18:03.0 | HIP 109391 | 37.10 |
| 2026-04-01 00:00 | 22:11:40.81 | -20:17:59.4 | HIP 109391 | 37.25 |
| 2026-04-01 12:00 | 22:11:41.87 | -20:17:55.8 | HIP 109391 | 37.39 |
| 2026-04-02 00:00 | 22:11:42.94 | -20:17:52.3 | HIP 109391 | 37.55 |
| 2026-04-02 12:00 | 22:11:43.99 | -20:17:48.9 | HIP 109391 | 37.70 |
| 2026-04-03 00:00 | 22:11:45.04 | -20:17:45.6 | HIP 109391 | 37.85 |
| 2026-04-03 12:00 | 22:11:46.08 | -20:17:42.3 | HIP 109391 | 38.00 |
| 2026-04-04 00:00 | 22:11:47.11 | -20:17:39.0 | HIP 109391 | 38.15 |
| 2026-04-04 12:00 | 22:11:48.13 | -20:17:35.9 | HIP 109391 | 38.30 |
| 2026-04-05 00:00 | 22:11:49.15 | -20:17:32.7 | HIP 109652 | 38.32 |
| 2026-04-05 12:00 | 22:11:50.15 | -20:17:29.7 | HIP 109652 | 38.28 |
| 2026-04-06 00:00 | 22:11:51.15 | -20:17:26.7 | HIP 109652 | 38.25 |
| 2026-04-06 12:00 | 22:11:52.14 | -20:17:23.8 | HIP 109652 | 38.22 |
| 2026-04-07 00:00 | 22:11:53.13 | -20:17:20.9 | HIP 109652 | 38.19 |
| 2026-04-07 12:00 | 22:11:54.10 | -20:17:18.1 | HIP 109652 | 38.16 |
| 2026-04-08 00:00 | 22:11:55.07 | -20:17:15.4 | HIP 109652 | 38.13 |
| 2026-04-08 12:00 | 22:11:56.02 | -20:17:12.7 | HIP 109652 | 38.10 |
| 2026-04-09 00:00 | 22:11:56.97 | -20:17:10.1 | HIP 109652 | 38.07 |
| 2026-04-09 12:00 | 22:11:57.91 | -20:17:07.5 | HIP 109652 | 38.05 |
| 2026-04-10 00:00 | 22:11:58.85 | -20:17:05.1 | HIP 109652 | 38.02 |
| 2026-04-10 12:00 | 22:11:59.77 | -20:17:02.6 | HIP 109652 | 38.00 |
| 2026-04-11 00:00 | 22:12:00.69 | -20:17:00.3 | HIP 109652 | 37.97 |
| 2026-04-11 12:00 | 22:12:01.59 | -20:16:58.0 | HIP 109652 | 37.95 |
| 2026-04-12 00:00 | 22:12:02.49 | -20:16:55.8 | HIP 109652 | 37.93 |
| 2026-04-12 12:00 | 22:12:03.38 | -20:16:53.6 | HIP 109652 | 37.91 |
| 2026-04-13 00:00 | 22:12:04.26 | -20:16:51.5 | HIP 109652 | 37.89 |
| 2026-04-13 12:00 | 22:12:05.13 | -20:16:49.5 | HIP 109652 | 37.87 |
| 2026-04-14 00:00 | 22:12:05.99 | -20:16:47.5 | HIP 109652 | 37.85 |
| 2026-04-14 12:00 | 22:12:06.84 | -20:16:45.6 | HIP 109652 | 37.83 |
| 2026-04-15 00:00 | 22:12:07.68 | -20:16:43.8 | HIP 109652 | 37.81 |
| 2026-04-15 12:00 | 22:12:08.51 | -20:16:42.0 | HIP 109652 | 37.79 |
| 2026-04-16 00:00 | 22:12:09.34 | -20:16:40.3 | HIP 109652 | 37.77 |