メタデータ
| 項目 |
値 |
| Designation |
304P/Ory |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-10-19T17:18:25.943040Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:14:15Z |
| Obs used |
1496 |
| NEO |
- |
| M1 |
15.100 |
| K1 |
14.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-07-30.0000000 |
| e |
0.57417592 |
| q (au) |
1.381374 |
| a (au) |
3.244002 |
| i (deg) |
2.755646 |
| Ω (om, deg) |
60.682083 |
| ω (w, deg) |
329.661369 |
| M (ma, deg) |
170.927265 |
等級
散乱 + 全体線形
$$
M_a = (13.926 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.926 |
| 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
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) |
| 2026-07-29 00:00 |
08:17:38.28 |
+21:12:46.6 |
HIP 40650 |
3.91 |
| 2026-07-29 12:00 |
08:18:50.14 |
+21:09:08.1 |
HIP 40781 |
10.10 |
| 2026-07-30 00:00 |
08:20:01.77 |
+21:05:28.5 |
HIP 40807 |
11.22 |
| 2026-07-30 12:00 |
08:21:13.17 |
+21:01:47.6 |
HIP 40866 |
20.86 |
| 2026-07-31 00:00 |
08:22:24.33 |
+20:58:05.5 |
HIP 41083 |
25.08 |
| 2026-07-31 12:00 |
08:23:35.26 |
+20:54:22.3 |
HIP 41083 |
22.14 |
| 2026-08-01 00:00 |
08:24:45.95 |
+20:50:37.9 |
HIP 41311 |
24.85 |
| 2026-08-01 12:00 |
08:25:56.42 |
+20:46:52.3 |
HIP 41311 |
24.73 |
| 2026-08-02 00:00 |
08:27:06.66 |
+20:43:05.7 |
HIP 41524 |
29.44 |
| 2026-08-02 12:00 |
08:28:16.67 |
+20:39:17.9 |
HIP 41638 |
21.36 |
| 2026-08-03 00:00 |
08:29:26.45 |
+20:35:29.0 |
HIP 41638 |
9.70 |
| 2026-08-03 12:00 |
08:30:36.00 |
+20:31:39.1 |
HIP 41638 |
17.13 |
| 2026-08-04 00:00 |
08:31:45.33 |
+20:27:48.2 |
HIP 41909 |
13.46 |
| 2026-08-04 12:00 |
08:32:54.43 |
+20:23:56.2 |
HIP 41909 |
3.77 |
| 2026-08-05 00:00 |
08:34:03.30 |
+20:20:03.2 |
HIP 41978 |
10.01 |
| 2026-08-05 12:00 |
08:35:11.95 |
+20:16:09.2 |
HIP 42201 |
15.96 |
| 2026-08-06 00:00 |
08:36:20.38 |
+20:12:14.2 |
HIP 42201 |
8.28 |
| 2026-08-06 12:00 |
08:37:28.59 |
+20:08:18.3 |
HIP 42201 |
20.66 |
| 2026-08-07 00:00 |
08:38:36.57 |
+20:04:21.4 |
HIP 42516 |
21.46 |
| 2026-08-07 12:00 |
08:39:44.33 |
+20:00:23.7 |
HIP 42516 |
5.19 |
| 2026-08-08 00:00 |
08:40:51.87 |
+19:56:25.0 |
HIP 42523 |
9.67 |
| 2026-08-08 12:00 |
08:41:59.19 |
+19:52:25.4 |
HIP 42673 |
2.14 |
| 2026-08-09 00:00 |
08:43:06.29 |
+19:48:25.0 |
HIP 42673 |
18.37 |
| 2026-08-09 12:00 |
08:44:13.17 |
+19:44:23.7 |
HIP 43004 |
28.39 |
| 2026-08-10 00:00 |
08:45:19.84 |
+19:40:21.6 |
HIP 43050 |
13.28 |
| 2026-08-10 12:00 |
08:46:26.28 |
+19:36:18.6 |
HIP 43050 |
6.74 |
| 2026-08-11 00:00 |
08:47:32.51 |
+19:32:14.9 |
HIP 43050 |
20.86 |
| 2026-08-11 12:00 |
08:48:38.52 |
+19:28:10.4 |
HIP 43050 |
36.63 |
| 2026-08-12 00:00 |
08:49:44.32 |
+19:24:05.2 |
HIP 43564 |
36.85 |
| 2026-08-12 12:00 |
08:50:49.89 |
+19:19:59.2 |
HIP 43564 |
21.29 |
| 2026-08-13 00:00 |
08:51:55.26 |
+19:15:52.5 |
HIP 43564 |
7.80 |
| 2026-08-13 12:00 |
08:53:00.40 |
+19:11:45.0 |
HIP 43642 |
8.96 |
| 2026-08-14 00:00 |
08:54:05.33 |
+19:07:36.9 |
HIP 43642 |
15.77 |
| 2026-08-14 12:00 |
08:55:10.05 |
+19:03:28.1 |
HIP 43642 |
30.32 |
| 2026-08-15 00:00 |
08:56:14.56 |
+18:59:18.7 |
HIP 44022 |
29.66 |
| 2026-08-15 12:00 |
08:57:18.85 |
+18:55:08.6 |
HIP 44090 |
21.92 |
| 2026-08-16 00:00 |
08:58:22.93 |
+18:50:57.9 |
HIP 44090 |
10.46 |
| 2026-08-16 12:00 |
08:59:26.79 |
+18:46:46.7 |
HIP 44090 |
15.23 |
| 2026-08-17 00:00 |
09:00:30.45 |
+18:42:34.8 |
HIP 44312 |
23.76 |
| 2026-08-17 12:00 |
09:01:33.89 |
+18:38:22.3 |
HIP 44312 |
23.92 |
| 2026-08-18 00:00 |
09:02:37.13 |
+18:34:09.3 |
HIP 44489 |
19.19 |
| 2026-08-18 12:00 |
09:03:40.15 |
+18:29:55.8 |
HIP 44489 |
11.61 |
| 2026-08-19 00:00 |
09:04:42.97 |
+18:25:41.7 |
HIP 44529 |
10.22 |