メタデータ
| 項目 |
値 |
| Designation |
C/2013 F2 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-04-19T00:12:51.621120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:32Z |
| Obs used |
168 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-07-28.0000000 |
| e |
0.99925889 |
| q (au) |
6.217862 |
| a (au) |
8389.886246 |
| i (deg) |
61.749267 |
| Ω (om, deg) |
344.272220 |
| ω (w, deg) |
122.991132 |
| M (ma, deg) |
0.000128 |
等級
散乱 + 全体線形
$$
M_a = (2.163 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.163 |
| n |
6.000 |
| 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) |
| 2026-06-01 00:00 |
11:25:15.21 |
-58:33:41.2 |
HIP 55594 |
20.46 |
| 2026-06-01 12:00 |
11:25:13.96 |
-58:32:49.2 |
HIP 55594 |
20.93 |
| 2026-06-02 00:00 |
11:25:12.79 |
-58:31:57.2 |
HIP 55594 |
21.43 |
| 2026-06-02 12:00 |
11:25:11.68 |
-58:31:05.3 |
HIP 55594 |
21.96 |
| 2026-06-03 00:00 |
11:25:10.63 |
-58:30:13.4 |
HIP 55594 |
22.52 |
| 2026-06-03 12:00 |
11:25:09.66 |
-58:29:21.5 |
HIP 55594 |
23.10 |
| 2026-06-04 00:00 |
11:25:08.75 |
-58:28:29.8 |
HIP 55518 |
23.29 |
| 2026-06-04 12:00 |
11:25:07.91 |
-58:27:38.0 |
HIP 55518 |
23.00 |
| 2026-06-05 00:00 |
11:25:07.14 |
-58:26:46.3 |
HIP 55518 |
22.76 |
| 2026-06-05 12:00 |
11:25:06.43 |
-58:25:54.7 |
HIP 55518 |
22.55 |
| 2026-06-06 00:00 |
11:25:05.79 |
-58:25:03.2 |
HIP 55518 |
22.38 |
| 2026-06-06 12:00 |
11:25:05.22 |
-58:24:11.8 |
HIP 55518 |
22.25 |
| 2026-06-07 00:00 |
11:25:04.72 |
-58:23:20.4 |
HIP 55518 |
22.17 |
| 2026-06-07 12:00 |
11:25:04.28 |
-58:22:29.1 |
HIP 55518 |
22.13 |
| 2026-06-08 00:00 |
11:25:03.91 |
-58:21:37.9 |
HIP 55518 |
22.12 |
| 2026-06-08 12:00 |
11:25:03.61 |
-58:20:46.8 |
HIP 55518 |
22.16 |
| 2026-06-09 00:00 |
11:25:03.37 |
-58:19:55.7 |
HIP 55518 |
22.25 |
| 2026-06-09 12:00 |
11:25:03.20 |
-58:19:04.8 |
HIP 55518 |
22.37 |
| 2026-06-10 00:00 |
11:25:03.10 |
-58:18:14.0 |
HIP 55518 |
22.53 |
| 2026-06-10 12:00 |
11:25:03.06 |
-58:17:23.3 |
HIP 55518 |
22.73 |
| 2026-06-11 00:00 |
11:25:03.10 |
-58:16:32.7 |
HIP 55518 |
22.96 |
| 2026-06-11 12:00 |
11:25:03.19 |
-58:15:42.3 |
HIP 55518 |
23.24 |
| 2026-06-12 00:00 |
11:25:03.36 |
-58:14:51.9 |
HIP 55518 |
23.54 |
| 2026-06-12 12:00 |
11:25:03.59 |
-58:14:01.7 |
HIP 55645 |
22.98 |
| 2026-06-13 00:00 |
11:25:03.88 |
-58:13:11.7 |
HIP 55645 |
22.23 |
| 2026-06-13 12:00 |
11:25:04.25 |
-58:12:21.7 |
HIP 55645 |
21.49 |
| 2026-06-14 00:00 |
11:25:04.67 |
-58:11:31.9 |
HIP 55645 |
20.77 |
| 2026-06-14 12:00 |
11:25:05.17 |
-58:10:42.3 |
HIP 55645 |
20.06 |
| 2026-06-15 00:00 |
11:25:05.73 |
-58:09:52.8 |
HIP 55645 |
19.36 |
| 2026-06-15 12:00 |
11:25:06.35 |
-58:09:03.4 |
HIP 55645 |
18.68 |
| 2026-06-16 00:00 |
11:25:07.05 |
-58:08:14.2 |
HIP 55645 |
18.02 |
| 2026-06-16 12:00 |
11:25:07.80 |
-58:07:25.2 |
HIP 55645 |
17.38 |
| 2026-06-17 00:00 |
11:25:08.62 |
-58:06:36.4 |
HIP 55645 |
16.77 |
| 2026-06-17 12:00 |
11:25:09.51 |
-58:05:47.7 |
HIP 55645 |
16.18 |
| 2026-06-18 00:00 |
11:25:10.46 |
-58:04:59.2 |
HIP 55645 |
15.62 |
| 2026-06-18 12:00 |
11:25:11.48 |
-58:04:10.9 |
HIP 55645 |
15.09 |
| 2026-06-19 00:00 |
11:25:12.56 |
-58:03:22.7 |
HIP 55645 |
14.59 |
| 2026-06-19 12:00 |
11:25:13.70 |
-58:02:34.8 |
HIP 55645 |
14.14 |
| 2026-06-20 00:00 |
11:25:14.91 |
-58:01:47.1 |
HIP 55645 |
13.72 |
| 2026-06-20 12:00 |
11:25:16.18 |
-58:00:59.5 |
HIP 55645 |
13.35 |
| 2026-06-21 00:00 |
11:25:17.52 |
-58:00:12.2 |
HIP 55645 |
13.03 |
| 2026-06-21 12:00 |
11:25:18.91 |
-57:59:25.0 |
HIP 55645 |
12.77 |
| 2026-06-22 00:00 |
11:25:20.37 |
-57:58:38.1 |
HIP 55645 |
12.55 |