メタデータ
| 項目 |
値 |
| Designation |
367P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-11-29T20:09:13.155840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:37Z |
| Obs used |
129 |
| NEO |
- |
| M1 |
14.300 |
| 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) |
2012-04-12.0000000 |
| e |
0.27988242 |
| q (au) |
2.528309 |
| a (au) |
3.510967 |
| i (deg) |
8.459533 |
| Ω (om, deg) |
58.741477 |
| ω (w, deg) |
173.479131 |
| M (ma, deg) |
20.099623 |
等級
散乱 + 全体線形
$$
M_a = (17.113 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.113 |
| n |
2.000 |
| gf |
0.974 |
| gb |
-0.508 |
| k |
1.000 |
| δ90 |
9.568 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
23:51:28.68 |
-12:14:00.9 |
HIP 117747 |
23.26 |
| 2026-09-20 12:00 |
23:51:07.46 |
-12:15:44.2 |
HIP 117747 |
28.56 |
| 2026-09-21 00:00 |
23:50:46.26 |
-12:17:26.3 |
HIP 117483 |
28.91 |
| 2026-09-21 12:00 |
23:50:25.09 |
-12:19:07.2 |
HIP 117483 |
24.15 |
| 2026-09-22 00:00 |
23:50:03.95 |
-12:20:46.7 |
HIP 117483 |
19.77 |
| 2026-09-22 12:00 |
23:49:42.84 |
-12:22:24.9 |
HIP 117483 |
16.06 |
| 2026-09-23 00:00 |
23:49:21.77 |
-12:24:01.7 |
HIP 117483 |
13.56 |
| 2026-09-23 12:00 |
23:49:00.74 |
-12:25:37.2 |
HIP 117483 |
12.99 |
| 2026-09-24 00:00 |
23:48:39.77 |
-12:27:11.3 |
HIP 117483 |
14.54 |
| 2026-09-24 12:00 |
23:48:18.84 |
-12:28:44.0 |
HIP 117483 |
17.64 |
| 2026-09-25 00:00 |
23:47:57.97 |
-12:30:15.3 |
HIP 117483 |
21.63 |
| 2026-09-25 12:00 |
23:47:37.16 |
-12:31:45.1 |
HIP 117262 |
20.47 |
| 2026-09-26 00:00 |
23:47:16.41 |
-12:33:13.5 |
HIP 117262 |
15.89 |
| 2026-09-26 12:00 |
23:46:55.74 |
-12:34:40.4 |
HIP 117262 |
11.93 |
| 2026-09-27 00:00 |
23:46:35.13 |
-12:36:05.8 |
HIP 117262 |
9.37 |
| 2026-09-27 12:00 |
23:46:14.60 |
-12:37:29.7 |
HIP 117262 |
9.37 |
| 2026-09-28 00:00 |
23:45:54.15 |
-12:38:52.1 |
HIP 117262 |
11.91 |
| 2026-09-28 12:00 |
23:45:33.79 |
-12:40:12.9 |
HIP 117262 |
15.79 |
| 2026-09-29 00:00 |
23:45:13.51 |
-12:41:32.1 |
HIP 117262 |
20.22 |
| 2026-09-29 12:00 |
23:44:53.33 |
-12:42:49.8 |
HIP 117262 |
24.89 |
| 2026-09-30 00:00 |
23:44:33.24 |
-12:44:05.9 |
HIP 117085 |
27.86 |
| 2026-09-30 12:00 |
23:44:13.26 |
-12:45:20.5 |
HIP 117085 |
26.08 |
| 2026-10-01 00:00 |
23:43:53.37 |
-12:46:33.3 |
HIP 117085 |
25.22 |
| 2026-10-01 12:00 |
23:43:33.60 |
-12:47:44.6 |
HIP 117085 |
25.35 |
| 2026-10-02 00:00 |
23:43:13.93 |
-12:48:54.2 |
HIP 117085 |
26.44 |
| 2026-10-02 12:00 |
23:42:54.39 |
-12:50:02.2 |
HIP 117085 |
28.35 |
| 2026-10-03 00:00 |
23:42:34.96 |
-12:51:08.4 |
HIP 117085 |
30.93 |
| 2026-10-03 12:00 |
23:42:15.65 |
-12:52:13.0 |
HIP 116812 |
26.29 |
| 2026-10-04 00:00 |
23:41:56.47 |
-12:53:15.9 |
HIP 116812 |
21.51 |
| 2026-10-04 12:00 |
23:41:37.42 |
-12:54:17.1 |
HIP 116812 |
16.76 |
| 2026-10-05 00:00 |
23:41:18.51 |
-12:55:16.5 |
HIP 116812 |
12.05 |
| 2026-10-05 12:00 |
23:40:59.73 |
-12:56:14.2 |
HIP 116812 |
7.40 |
| 2026-10-06 00:00 |
23:40:41.10 |
-12:57:10.2 |
HIP 116812 |
2.83 |
| 2026-10-06 12:00 |
23:40:22.61 |
-12:58:04.4 |
HIP 116812 |
2.02 |
| 2026-10-07 00:00 |
23:40:04.27 |
-12:58:56.8 |
HIP 116812 |
6.47 |
| 2026-10-07 12:00 |
23:39:46.08 |
-12:59:47.4 |
HIP 116812 |
10.96 |
| 2026-10-08 00:00 |
23:39:28.05 |
-13:00:36.3 |
HIP 116812 |
15.41 |
| 2026-10-08 12:00 |
23:39:10.18 |
-13:01:23.3 |
HIP 116812 |
19.83 |
| 2026-10-09 00:00 |
23:38:52.47 |
-13:02:08.6 |
HIP 116591 |
17.82 |
| 2026-10-09 12:00 |
23:38:34.93 |
-13:02:52.0 |
HIP 116591 |
13.51 |
| 2026-10-10 00:00 |
23:38:17.57 |
-13:03:33.5 |
HIP 116591 |
9.26 |
| 2026-10-10 12:00 |
23:38:00.37 |
-13:04:13.3 |
HIP 116591 |
5.11 |
| 2026-10-11 00:00 |
23:37:43.35 |
-13:04:51.2 |
HIP 116591 |
1.54 |