C/1962 C1 (Seki-Lines)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/1962 C1 (Seki-Lines) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1962-04-01T15:54:42.880320Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:29:14Z |
| Obs used | 32 |
| 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) | 1962-05-30.0000000 |
| e | 1.00000446 |
| q (au) | 0.031398 |
| a (au) | -7039.189219 |
| i (deg) | 65.014482 |
| Ω (om, deg) | 304.677692 |
| ω (w, deg) | 11.473294 |
| M (ma, deg) | 0.000097 |
等級
散乱 + 全体線形
$$ M_a = (5.920 + 3.807\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 5.920 |
| n | 3.807 |
| gf | 0.800 |
| gb | -0.500 |
| k | 0.800 |
| 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 |
|---|---|---|---|
| 1962-02-07 | 1962-03-27 | -0.1771 | +0.572 |
| 1962-04-03 | 1962-05-02 | -1.0610 | -0.178 |
| 1962-05-02 | 1963-01-25 | +9.7849 | +0.146 |
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 | 08:35:31.10 | +10:00:33.0 | HIP 42159 | 30.67 |
| 2026-07-29 12:00 | 08:35:32.36 | +10:00:28.2 | HIP 42159 | 30.57 |
| 2026-07-30 00:00 | 08:35:33.62 | +10:00:23.4 | HIP 42159 | 30.48 |
| 2026-07-30 12:00 | 08:35:34.88 | +10:00:18.6 | HIP 42159 | 30.38 |
| 2026-07-31 00:00 | 08:35:36.14 | +10:00:13.7 | HIP 42159 | 30.29 |
| 2026-07-31 12:00 | 08:35:37.40 | +10:00:08.8 | HIP 42265 | 30.12 |
| 2026-08-01 00:00 | 08:35:38.66 | +10:00:03.9 | HIP 42265 | 29.84 |
| 2026-08-01 12:00 | 08:35:39.91 | +09:59:59.0 | HIP 42265 | 29.56 |
| 2026-08-02 00:00 | 08:35:41.17 | +09:59:54.1 | HIP 42265 | 29.28 |
| 2026-08-02 12:00 | 08:35:42.43 | +09:59:49.1 | HIP 42265 | 29.00 |
| 2026-08-03 00:00 | 08:35:43.69 | +09:59:44.1 | HIP 42265 | 28.73 |
| 2026-08-03 12:00 | 08:35:44.94 | +09:59:39.1 | HIP 42265 | 28.45 |
| 2026-08-04 00:00 | 08:35:46.20 | +09:59:34.1 | HIP 42265 | 28.17 |
| 2026-08-04 12:00 | 08:35:47.45 | +09:59:29.0 | HIP 42265 | 27.90 |
| 2026-08-05 00:00 | 08:35:48.70 | +09:59:23.9 | HIP 42265 | 27.62 |
| 2026-08-05 12:00 | 08:35:49.96 | +09:59:18.8 | HIP 42265 | 27.35 |
| 2026-08-06 00:00 | 08:35:51.21 | +09:59:13.7 | HIP 42265 | 27.08 |
| 2026-08-06 12:00 | 08:35:52.46 | +09:59:08.6 | HIP 42265 | 26.81 |
| 2026-08-07 00:00 | 08:35:53.71 | +09:59:03.4 | HIP 42265 | 26.54 |
| 2026-08-07 12:00 | 08:35:54.95 | +09:58:58.2 | HIP 42265 | 26.27 |
| 2026-08-08 00:00 | 08:35:56.20 | +09:58:53.0 | HIP 42265 | 26.00 |
| 2026-08-08 12:00 | 08:35:57.44 | +09:58:47.8 | HIP 42265 | 25.73 |
| 2026-08-09 00:00 | 08:35:58.69 | +09:58:42.6 | HIP 42265 | 25.47 |
| 2026-08-09 12:00 | 08:35:59.93 | +09:58:37.3 | HIP 42265 | 25.20 |
| 2026-08-10 00:00 | 08:36:01.17 | +09:58:32.1 | HIP 42265 | 24.94 |
| 2026-08-10 12:00 | 08:36:02.40 | +09:58:26.8 | HIP 42265 | 24.68 |
| 2026-08-11 00:00 | 08:36:03.64 | +09:58:21.5 | HIP 42265 | 24.42 |
| 2026-08-11 12:00 | 08:36:04.87 | +09:58:16.1 | HIP 42265 | 24.16 |
| 2026-08-12 00:00 | 08:36:06.10 | +09:58:10.8 | HIP 42265 | 23.90 |
| 2026-08-12 12:00 | 08:36:07.33 | +09:58:05.4 | HIP 42265 | 23.65 |
| 2026-08-13 00:00 | 08:36:08.56 | +09:58:00.1 | HIP 42265 | 23.39 |
| 2026-08-13 12:00 | 08:36:09.78 | +09:57:54.7 | HIP 42265 | 23.14 |
| 2026-08-14 00:00 | 08:36:11.00 | +09:57:49.3 | HIP 42265 | 22.89 |
| 2026-08-14 12:00 | 08:36:12.22 | +09:57:43.9 | HIP 42265 | 22.64 |
| 2026-08-15 00:00 | 08:36:13.44 | +09:57:38.4 | HIP 42265 | 22.39 |
| 2026-08-15 12:00 | 08:36:14.65 | +09:57:33.0 | HIP 42265 | 22.15 |
| 2026-08-16 00:00 | 08:36:15.86 | +09:57:27.6 | HIP 42265 | 21.90 |
| 2026-08-16 12:00 | 08:36:17.07 | +09:57:22.1 | HIP 42265 | 21.66 |
| 2026-08-17 00:00 | 08:36:18.27 | +09:57:16.6 | HIP 42265 | 21.42 |
| 2026-08-17 12:00 | 08:36:19.47 | +09:57:11.1 | HIP 42265 | 21.18 |
| 2026-08-18 00:00 | 08:36:20.67 | +09:57:05.6 | HIP 42265 | 20.95 |
| 2026-08-18 12:00 | 08:36:21.86 | +09:57:00.1 | HIP 42265 | 20.72 |
| 2026-08-19 00:00 | 08:36:23.05 | +09:56:54.6 | HIP 42265 | 20.49 |