メタデータ
| 項目 |
値 |
| Designation |
346P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-08-20T20:43:06.847680Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:55Z |
| Obs used |
553 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
12.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-10-21.0000000 |
| e |
0.50406176 |
| q (au) |
2.222599 |
| a (au) |
4.481605 |
| i (deg) |
22.172168 |
| Ω (om, deg) |
102.556632 |
| ω (w, deg) |
335.762986 |
| M (ma, deg) |
158.127468 |
等級
散乱 + 全体線形
$$
M_a = (10.367 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.367 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
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 |
08:03:23.96 |
+18:27:53.6 |
HIP 39535 |
29.72 |
| 2026-09-20 12:00 |
08:04:21.49 |
+18:28:19.9 |
HIP 39535 |
22.90 |
| 2026-09-21 00:00 |
08:05:18.89 |
+18:28:45.9 |
HIP 39644 |
19.28 |
| 2026-09-21 12:00 |
08:06:16.17 |
+18:29:11.8 |
HIP 39644 |
15.85 |
| 2026-09-22 00:00 |
08:07:13.33 |
+18:29:37.6 |
HIP 39644 |
22.32 |
| 2026-09-22 12:00 |
08:08:10.37 |
+18:30:03.3 |
HIP 39805 |
31.80 |
| 2026-09-23 00:00 |
08:09:07.29 |
+18:30:28.8 |
HIP 39991 |
34.80 |
| 2026-09-23 12:00 |
08:10:04.08 |
+18:30:54.3 |
HIP 39991 |
31.94 |
| 2026-09-24 00:00 |
08:11:00.75 |
+18:31:19.7 |
HIP 40187 |
21.61 |
| 2026-09-24 12:00 |
08:11:57.30 |
+18:31:45.1 |
HIP 40187 |
8.23 |
| 2026-09-25 00:00 |
08:12:53.71 |
+18:32:10.4 |
HIP 40187 |
5.30 |
| 2026-09-25 12:00 |
08:13:50.00 |
+18:32:35.7 |
HIP 40187 |
18.58 |
| 2026-09-26 00:00 |
08:14:46.17 |
+18:33:01.0 |
HIP 40483 |
19.17 |
| 2026-09-26 12:00 |
08:15:42.20 |
+18:33:26.4 |
HIP 40483 |
9.06 |
| 2026-09-27 00:00 |
08:16:38.10 |
+18:33:51.8 |
HIP 40483 |
12.19 |
| 2026-09-27 12:00 |
08:17:33.87 |
+18:34:17.2 |
HIP 40483 |
23.77 |
| 2026-09-28 00:00 |
08:18:29.51 |
+18:34:42.8 |
HIP 40733 |
16.41 |
| 2026-09-28 12:00 |
08:19:25.02 |
+18:35:08.4 |
HIP 40733 |
17.79 |
| 2026-09-29 00:00 |
08:20:20.40 |
+18:35:34.1 |
HIP 40733 |
26.63 |
| 2026-09-29 12:00 |
08:21:15.63 |
+18:36:00.0 |
HIP 41117 |
33.97 |
| 2026-09-30 00:00 |
08:22:10.74 |
+18:36:26.1 |
HIP 41117 |
23.59 |
| 2026-09-30 12:00 |
08:23:05.70 |
+18:36:52.3 |
HIP 41117 |
17.36 |
| 2026-10-01 00:00 |
08:24:00.53 |
+18:37:18.7 |
HIP 41117 |
19.64 |
| 2026-10-01 12:00 |
08:24:55.22 |
+18:37:45.3 |
HIP 41117 |
28.41 |
| 2026-10-02 00:00 |
08:25:49.76 |
+18:38:12.1 |
HIP 41233 |
35.03 |
| 2026-10-02 12:00 |
08:26:44.17 |
+18:38:39.3 |
HIP 41440 |
36.90 |
| 2026-10-03 00:00 |
08:27:38.43 |
+18:39:06.6 |
HIP 41505 |
35.17 |
| 2026-10-03 12:00 |
08:28:32.54 |
+18:39:34.3 |
HIP 41727 |
32.79 |
| 2026-10-04 00:00 |
08:29:26.51 |
+18:40:02.3 |
HIP 41727 |
22.51 |
| 2026-10-04 12:00 |
08:30:20.34 |
+18:40:30.7 |
HIP 41727 |
16.27 |
| 2026-10-05 00:00 |
08:31:14.01 |
+18:40:59.4 |
HIP 41765 |
17.41 |
| 2026-10-05 12:00 |
08:32:07.53 |
+18:41:28.5 |
HIP 41833 |
18.84 |
| 2026-10-06 00:00 |
08:33:00.90 |
+18:41:58.0 |
HIP 41833 |
25.57 |
| 2026-10-06 12:00 |
08:33:54.12 |
+18:42:28.0 |
HIP 42058 |
19.85 |
| 2026-10-07 00:00 |
08:34:47.18 |
+18:42:58.4 |
HIP 42058 |
19.93 |
| 2026-10-07 12:00 |
08:35:40.08 |
+18:43:29.3 |
HIP 42247 |
18.67 |
| 2026-10-08 00:00 |
08:36:32.83 |
+18:44:00.6 |
HIP 42247 |
9.65 |
| 2026-10-08 12:00 |
08:37:25.42 |
+18:44:32.6 |
HIP 42284 |
7.84 |
| 2026-10-09 00:00 |
08:38:17.85 |
+18:45:05.0 |
HIP 42284 |
15.80 |
| 2026-10-09 12:00 |
08:39:10.11 |
+18:45:38.0 |
HIP 42487 |
14.69 |
| 2026-10-10 00:00 |
08:40:02.22 |
+18:46:11.7 |
HIP 42487 |
13.79 |
| 2026-10-10 12:00 |
08:40:54.15 |
+18:46:45.9 |
HIP 42705 |
20.39 |
| 2026-10-11 00:00 |
08:41:45.92 |
+18:47:20.8 |
HIP 42705 |
10.52 |