C/1967 C1 (Seki)
メタデータ
| 項目 |
値 |
| Designation |
C/1967 C1 (Seki) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1967-03-13T17:47:57.289920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
18 |
| NEO |
- |
| M1 |
10.600 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1967-02-14.0000000 |
| e |
0.99990293 |
| q (au) |
0.457380 |
| a (au) |
4712.068054 |
| i (deg) |
106.468426 |
| Ω (om, deg) |
200.519565 |
| ω (w, deg) |
144.290739 |
| M (ma, deg) |
359.999915 |
等級
散乱 + 全体線形
$$
M_a = (10.171 + 3.612\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.171 |
| n |
3.612 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
12:53:45.75 |
-52:10:50.4 |
HIP 62946 |
5.98 |
| 2026-02-03 12:00 |
12:53:44.71 |
-52:11:00.9 |
HIP 62946 |
5.86 |
| 2026-02-04 00:00 |
12:53:43.66 |
-52:11:11.4 |
HIP 62946 |
5.75 |
| 2026-02-04 12:00 |
12:53:42.58 |
-52:11:21.7 |
HIP 62946 |
5.65 |
| 2026-02-05 00:00 |
12:53:41.49 |
-52:11:32.0 |
HIP 62946 |
5.56 |
| 2026-02-05 12:00 |
12:53:40.39 |
-52:11:42.1 |
HIP 62946 |
5.48 |
| 2026-02-06 00:00 |
12:53:39.27 |
-52:11:52.1 |
HIP 62946 |
5.42 |
| 2026-02-06 12:00 |
12:53:38.13 |
-52:12:02.0 |
HIP 62946 |
5.36 |
| 2026-02-07 00:00 |
12:53:36.97 |
-52:12:11.7 |
HIP 62946 |
5.32 |
| 2026-02-07 12:00 |
12:53:35.80 |
-52:12:21.4 |
HIP 62946 |
5.30 |
| 2026-02-08 00:00 |
12:53:34.62 |
-52:12:30.9 |
HIP 62946 |
5.28 |
| 2026-02-08 12:00 |
12:53:33.42 |
-52:12:40.4 |
HIP 62946 |
5.29 |
| 2026-02-09 00:00 |
12:53:32.20 |
-52:12:49.7 |
HIP 62946 |
5.30 |
| 2026-02-09 12:00 |
12:53:30.96 |
-52:12:58.9 |
HIP 62946 |
5.33 |
| 2026-02-10 00:00 |
12:53:29.72 |
-52:13:07.9 |
HIP 62946 |
5.37 |
| 2026-02-10 12:00 |
12:53:28.45 |
-52:13:16.9 |
HIP 62946 |
5.43 |
| 2026-02-11 00:00 |
12:53:27.17 |
-52:13:25.7 |
HIP 62946 |
5.50 |
| 2026-02-11 12:00 |
12:53:25.88 |
-52:13:34.4 |
HIP 62946 |
5.59 |
| 2026-02-12 00:00 |
12:53:24.57 |
-52:13:43.0 |
HIP 62946 |
5.68 |
| 2026-02-12 12:00 |
12:53:23.24 |
-52:13:51.5 |
HIP 62946 |
5.79 |
| 2026-02-13 00:00 |
12:53:21.90 |
-52:13:59.8 |
HIP 62946 |
5.91 |
| 2026-02-13 12:00 |
12:53:20.55 |
-52:14:08.0 |
HIP 62842 |
5.88 |
| 2026-02-14 00:00 |
12:53:19.18 |
-52:14:16.1 |
HIP 62842 |
5.63 |
| 2026-02-14 12:00 |
12:53:17.79 |
-52:14:24.1 |
HIP 62842 |
5.39 |
| 2026-02-15 00:00 |
12:53:16.40 |
-52:14:31.9 |
HIP 62842 |
5.15 |
| 2026-02-15 12:00 |
12:53:14.98 |
-52:14:39.6 |
HIP 62842 |
4.90 |
| 2026-02-16 00:00 |
12:53:13.56 |
-52:14:47.2 |
HIP 62842 |
4.65 |
| 2026-02-16 12:00 |
12:53:12.11 |
-52:14:54.7 |
HIP 62842 |
4.41 |
| 2026-02-17 00:00 |
12:53:10.66 |
-52:15:02.0 |
HIP 62842 |
4.16 |
| 2026-02-17 12:00 |
12:53:09.19 |
-52:15:09.2 |
HIP 62842 |
3.91 |
| 2026-02-18 00:00 |
12:53:07.70 |
-52:15:16.2 |
HIP 62842 |
3.66 |
| 2026-02-18 12:00 |
12:53:06.21 |
-52:15:23.2 |
HIP 62842 |
3.41 |
| 2026-02-19 00:00 |
12:53:04.70 |
-52:15:30.0 |
HIP 62842 |
3.16 |
| 2026-02-19 12:00 |
12:53:03.17 |
-52:15:36.6 |
HIP 62842 |
2.91 |
| 2026-02-20 00:00 |
12:53:01.63 |
-52:15:43.2 |
HIP 62842 |
2.66 |
| 2026-02-20 12:00 |
12:53:00.08 |
-52:15:49.6 |
HIP 62842 |
2.41 |
| 2026-02-21 00:00 |
12:52:58.52 |
-52:15:55.8 |
HIP 62842 |
2.16 |
| 2026-02-21 12:00 |
12:52:56.94 |
-52:16:02.0 |
HIP 62842 |
1.91 |
| 2026-02-22 00:00 |
12:52:55.35 |
-52:16:07.9 |
HIP 62842 |
1.66 |
| 2026-02-22 12:00 |
12:52:53.75 |
-52:16:13.8 |
HIP 62842 |
1.42 |
| 2026-02-23 00:00 |
12:52:52.14 |
-52:16:19.5 |
HIP 62842 |
1.18 |
| 2026-02-23 12:00 |
12:52:50.51 |
-52:16:25.1 |
HIP 62842 |
0.96 |
| 2026-02-24 00:00 |
12:52:48.87 |
-52:16:30.6 |
HIP 62842 |
0.76 |