メタデータ
| 項目 |
値 |
| Designation |
C/1963 F1 (Alcock) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1963-05-05T21:06:43.280640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
25 |
| 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) |
1963-05-15.0000000 |
| e |
0.99791950 |
| q (au) |
1.537080 |
| a (au) |
738.804223 |
| i (deg) |
86.218793 |
| Ω (om, deg) |
43.465153 |
| ω (w, deg) |
146.621136 |
| M (ma, deg) |
0.000448 |
等級
散乱 + 全体線形
$$
M_a = (4.297 + 5.819\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.297 |
| n |
5.819 |
| gf |
1.000 |
| gb |
-0.539 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
03:31:59.59 |
-30:26:02.2 |
HIP 16413 |
9.71 |
| 2026-06-01 12:00 |
03:32:01.05 |
-30:26:02.7 |
HIP 16413 |
9.98 |
| 2026-06-02 00:00 |
03:32:02.50 |
-30:26:03.2 |
HIP 16413 |
10.25 |
| 2026-06-02 12:00 |
03:32:03.95 |
-30:26:03.9 |
HIP 16413 |
10.52 |
| 2026-06-03 00:00 |
03:32:05.40 |
-30:26:04.8 |
HIP 16413 |
10.79 |
| 2026-06-03 12:00 |
03:32:06.84 |
-30:26:05.8 |
HIP 16413 |
11.06 |
| 2026-06-04 00:00 |
03:32:08.28 |
-30:26:06.9 |
HIP 16413 |
11.33 |
| 2026-06-04 12:00 |
03:32:09.72 |
-30:26:08.1 |
HIP 16413 |
11.60 |
| 2026-06-05 00:00 |
03:32:11.15 |
-30:26:09.5 |
HIP 16413 |
11.87 |
| 2026-06-05 12:00 |
03:32:12.57 |
-30:26:11.0 |
HIP 16413 |
12.15 |
| 2026-06-06 00:00 |
03:32:14.00 |
-30:26:12.6 |
HIP 16413 |
12.42 |
| 2026-06-06 12:00 |
03:32:15.42 |
-30:26:14.3 |
HIP 16413 |
12.69 |
| 2026-06-07 00:00 |
03:32:16.83 |
-30:26:16.2 |
HIP 16413 |
12.96 |
| 2026-06-07 12:00 |
03:32:18.24 |
-30:26:18.2 |
HIP 16413 |
13.23 |
| 2026-06-08 00:00 |
03:32:19.65 |
-30:26:20.4 |
HIP 16413 |
13.51 |
| 2026-06-08 12:00 |
03:32:21.05 |
-30:26:22.7 |
HIP 16413 |
13.78 |
| 2026-06-09 00:00 |
03:32:22.45 |
-30:26:25.1 |
HIP 16413 |
14.05 |
| 2026-06-09 12:00 |
03:32:23.84 |
-30:26:27.6 |
HIP 16413 |
14.32 |
| 2026-06-10 00:00 |
03:32:25.23 |
-30:26:30.3 |
HIP 16413 |
14.59 |
| 2026-06-10 12:00 |
03:32:26.61 |
-30:26:33.1 |
HIP 16413 |
14.86 |
| 2026-06-11 00:00 |
03:32:27.99 |
-30:26:36.0 |
HIP 16413 |
15.13 |
| 2026-06-11 12:00 |
03:32:29.36 |
-30:26:39.1 |
HIP 16413 |
15.40 |
| 2026-06-12 00:00 |
03:32:30.72 |
-30:26:42.2 |
HIP 16413 |
15.66 |
| 2026-06-12 12:00 |
03:32:32.09 |
-30:26:45.5 |
HIP 16413 |
15.93 |
| 2026-06-13 00:00 |
03:32:33.44 |
-30:26:49.0 |
HIP 16413 |
16.20 |
| 2026-06-13 12:00 |
03:32:34.79 |
-30:26:52.6 |
HIP 16413 |
16.47 |
| 2026-06-14 00:00 |
03:32:36.14 |
-30:26:56.3 |
HIP 16413 |
16.73 |
| 2026-06-14 12:00 |
03:32:37.48 |
-30:27:00.1 |
HIP 16413 |
17.00 |
| 2026-06-15 00:00 |
03:32:38.81 |
-30:27:04.0 |
HIP 16413 |
17.26 |
| 2026-06-15 12:00 |
03:32:40.14 |
-30:27:08.1 |
HIP 16413 |
17.52 |
| 2026-06-16 00:00 |
03:32:41.46 |
-30:27:12.3 |
HIP 16413 |
17.79 |
| 2026-06-16 12:00 |
03:32:42.77 |
-30:27:16.7 |
HIP 16413 |
18.05 |
| 2026-06-17 00:00 |
03:32:44.08 |
-30:27:21.1 |
HIP 16624 |
18.31 |
| 2026-06-17 12:00 |
03:32:45.39 |
-30:27:25.7 |
HIP 16624 |
18.03 |
| 2026-06-18 00:00 |
03:32:46.68 |
-30:27:30.4 |
HIP 16624 |
17.76 |
| 2026-06-18 12:00 |
03:32:47.97 |
-30:27:35.3 |
HIP 16624 |
17.48 |
| 2026-06-19 00:00 |
03:32:49.25 |
-30:27:40.2 |
HIP 16624 |
17.21 |
| 2026-06-19 12:00 |
03:32:50.53 |
-30:27:45.3 |
HIP 16624 |
16.94 |
| 2026-06-20 00:00 |
03:32:51.80 |
-30:27:50.5 |
HIP 16624 |
16.66 |
| 2026-06-20 12:00 |
03:32:53.06 |
-30:27:55.8 |
HIP 16624 |
16.39 |
| 2026-06-21 00:00 |
03:32:54.32 |
-30:28:01.3 |
HIP 16624 |
16.12 |
| 2026-06-21 12:00 |
03:32:55.57 |
-30:28:06.9 |
HIP 16624 |
15.85 |
| 2026-06-22 00:00 |
03:32:56.81 |
-30:28:12.6 |
HIP 16624 |
15.58 |