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) |
| 2026-07-29 00:00 |
03:34:03.64 |
-30:40:13.7 |
HIP 16624 |
3.25 |
| 2026-07-29 12:00 |
03:34:04.15 |
-30:40:26.9 |
HIP 16624 |
3.49 |
| 2026-07-30 00:00 |
03:34:04.64 |
-30:40:40.1 |
HIP 16624 |
3.73 |
| 2026-07-30 12:00 |
03:34:05.11 |
-30:40:53.4 |
HIP 16624 |
3.97 |
| 2026-07-31 00:00 |
03:34:05.58 |
-30:41:06.7 |
HIP 16624 |
4.21 |
| 2026-07-31 12:00 |
03:34:06.03 |
-30:41:20.1 |
HIP 16624 |
4.45 |
| 2026-08-01 00:00 |
03:34:06.48 |
-30:41:33.6 |
HIP 16624 |
4.68 |
| 2026-08-01 12:00 |
03:34:06.90 |
-30:41:47.2 |
HIP 16624 |
4.92 |
| 2026-08-02 00:00 |
03:34:07.32 |
-30:42:00.8 |
HIP 16624 |
5.16 |
| 2026-08-02 12:00 |
03:34:07.73 |
-30:42:14.5 |
HIP 16624 |
5.40 |
| 2026-08-03 00:00 |
03:34:08.12 |
-30:42:28.2 |
HIP 16624 |
5.64 |
| 2026-08-03 12:00 |
03:34:08.50 |
-30:42:42.0 |
HIP 16624 |
5.88 |
| 2026-08-04 00:00 |
03:34:08.87 |
-30:42:55.9 |
HIP 16624 |
6.12 |
| 2026-08-04 12:00 |
03:34:09.22 |
-30:43:09.8 |
HIP 16624 |
6.36 |
| 2026-08-05 00:00 |
03:34:09.57 |
-30:43:23.8 |
HIP 16624 |
6.59 |
| 2026-08-05 12:00 |
03:34:09.90 |
-30:43:37.8 |
HIP 16624 |
6.83 |
| 2026-08-06 00:00 |
03:34:10.21 |
-30:43:52.0 |
HIP 16624 |
7.07 |
| 2026-08-06 12:00 |
03:34:10.52 |
-30:44:06.1 |
HIP 16624 |
7.31 |
| 2026-08-07 00:00 |
03:34:10.81 |
-30:44:20.3 |
HIP 16624 |
7.55 |
| 2026-08-07 12:00 |
03:34:11.09 |
-30:44:34.6 |
HIP 16624 |
7.79 |
| 2026-08-08 00:00 |
03:34:11.36 |
-30:44:48.9 |
HIP 16624 |
8.03 |
| 2026-08-08 12:00 |
03:34:11.62 |
-30:45:03.3 |
HIP 16624 |
8.26 |
| 2026-08-09 00:00 |
03:34:11.86 |
-30:45:17.7 |
HIP 16624 |
8.50 |
| 2026-08-09 12:00 |
03:34:12.09 |
-30:45:32.2 |
HIP 16624 |
8.74 |
| 2026-08-10 00:00 |
03:34:12.30 |
-30:45:46.7 |
HIP 16624 |
8.98 |
| 2026-08-10 12:00 |
03:34:12.51 |
-30:46:01.3 |
HIP 16624 |
9.22 |
| 2026-08-11 00:00 |
03:34:12.70 |
-30:46:15.9 |
HIP 16624 |
9.45 |
| 2026-08-11 12:00 |
03:34:12.88 |
-30:46:30.6 |
HIP 16624 |
9.69 |
| 2026-08-12 00:00 |
03:34:13.04 |
-30:46:45.3 |
HIP 16624 |
9.93 |
| 2026-08-12 12:00 |
03:34:13.19 |
-30:47:00.0 |
HIP 16624 |
10.17 |
| 2026-08-13 00:00 |
03:34:13.33 |
-30:47:14.8 |
HIP 16624 |
10.41 |
| 2026-08-13 12:00 |
03:34:13.46 |
-30:47:29.7 |
HIP 16624 |
10.65 |
| 2026-08-14 00:00 |
03:34:13.57 |
-30:47:44.6 |
HIP 16624 |
10.88 |
| 2026-08-14 12:00 |
03:34:13.67 |
-30:47:59.5 |
HIP 16624 |
11.12 |
| 2026-08-15 00:00 |
03:34:13.76 |
-30:48:14.4 |
HIP 16624 |
11.36 |
| 2026-08-15 12:00 |
03:34:13.83 |
-30:48:29.4 |
HIP 16624 |
11.60 |
| 2026-08-16 00:00 |
03:34:13.89 |
-30:48:44.5 |
HIP 16624 |
11.84 |
| 2026-08-16 12:00 |
03:34:13.94 |
-30:48:59.5 |
HIP 16624 |
12.08 |
| 2026-08-17 00:00 |
03:34:13.98 |
-30:49:14.6 |
HIP 16624 |
12.31 |
| 2026-08-17 12:00 |
03:34:14.00 |
-30:49:29.8 |
HIP 16624 |
12.55 |
| 2026-08-18 00:00 |
03:34:14.01 |
-30:49:44.9 |
HIP 16624 |
12.79 |
| 2026-08-18 12:00 |
03:34:14.00 |
-30:50:00.1 |
HIP 16624 |
13.03 |
| 2026-08-19 00:00 |
03:34:13.98 |
-30:50:15.3 |
HIP 16624 |
13.27 |