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) |
| 2026-05-12 00:00 |
04:21:40.26 |
+22:03:39.0 |
HIP 20391 |
12.54 |
| 2026-05-12 12:00 |
04:23:26.37 |
+22:08:17.9 |
HIP 20391 |
21.34 |
| 2026-05-13 00:00 |
04:25:12.38 |
+22:12:52.0 |
HIP 20641 |
3.03 |
| 2026-05-13 12:00 |
04:26:58.29 |
+22:17:21.3 |
HIP 20859 |
17.28 |
| 2026-05-14 00:00 |
04:28:44.09 |
+22:21:45.7 |
HIP 20859 |
7.60 |
| 2026-05-14 12:00 |
04:30:29.79 |
+22:26:05.3 |
HIP 21115 |
19.12 |
| 2026-05-15 00:00 |
04:32:15.38 |
+22:30:20.1 |
HIP 21115 |
19.92 |
| 2026-05-15 12:00 |
04:34:00.85 |
+22:34:30.1 |
HIP 21341 |
12.46 |
| 2026-05-16 00:00 |
04:35:46.21 |
+22:38:35.3 |
HIP 21341 |
14.33 |
| 2026-05-16 12:00 |
04:37:31.45 |
+22:42:35.7 |
HIP 21677 |
23.80 |
| 2026-05-17 00:00 |
04:39:16.57 |
+22:46:31.3 |
HIP 21677 |
7.42 |
| 2026-05-17 12:00 |
04:41:01.56 |
+22:50:22.1 |
HIP 21840 |
11.61 |
| 2026-05-18 00:00 |
04:42:46.43 |
+22:54:08.2 |
HIP 21881 |
8.01 |
| 2026-05-18 12:00 |
04:44:31.16 |
+22:57:49.5 |
HIP 22013 |
8.63 |
| 2026-05-19 00:00 |
04:46:15.76 |
+23:01:26.0 |
HIP 22253 |
16.27 |
| 2026-05-19 12:00 |
04:48:00.22 |
+23:04:57.8 |
HIP 22253 |
8.07 |
| 2026-05-20 00:00 |
04:49:44.54 |
+23:08:24.9 |
HIP 22446 |
15.36 |
| 2026-05-20 12:00 |
04:51:28.72 |
+23:11:47.2 |
HIP 22610 |
10.90 |
| 2026-05-21 00:00 |
04:53:12.75 |
+23:15:04.9 |
HIP 22743 |
6.24 |
| 2026-05-21 12:00 |
04:54:56.64 |
+23:18:17.9 |
HIP 22743 |
18.96 |
| 2026-05-22 00:00 |
04:56:40.37 |
+23:21:26.1 |
HIP 22972 |
3.83 |
| 2026-05-22 12:00 |
04:58:23.95 |
+23:24:29.8 |
HIP 22972 |
25.74 |
| 2026-05-23 00:00 |
05:00:07.37 |
+23:27:28.8 |
HIP 23333 |
13.95 |
| 2026-05-23 12:00 |
05:01:50.64 |
+23:30:23.1 |
HIP 23333 |
10.58 |
| 2026-05-24 00:00 |
05:03:33.74 |
+23:33:12.9 |
HIP 23606 |
14.91 |
| 2026-05-24 12:00 |
05:05:16.68 |
+23:35:58.0 |
HIP 23645 |
5.32 |
| 2026-05-25 00:00 |
05:06:59.45 |
+23:38:38.6 |
HIP 23854 |
23.68 |
| 2026-05-25 12:00 |
05:08:42.06 |
+23:41:14.6 |
HIP 23854 |
28.53 |
| 2026-05-26 00:00 |
05:10:24.49 |
+23:43:46.1 |
HIP 24283 |
32.92 |
| 2026-05-26 12:00 |
05:12:06.75 |
+23:46:13.1 |
HIP 24283 |
10.92 |
| 2026-05-27 00:00 |
05:13:48.83 |
+23:48:35.5 |
HIP 24283 |
16.12 |
| 2026-05-27 12:00 |
05:15:30.74 |
+23:50:53.5 |
HIP 24487 |
3.74 |
| 2026-05-28 00:00 |
05:17:12.47 |
+23:53:07.0 |
HIP 24665 |
8.68 |
| 2026-05-28 12:00 |
05:18:54.02 |
+23:55:16.1 |
HIP 24665 |
19.52 |
| 2026-05-29 00:00 |
05:20:35.38 |
+23:57:20.8 |
HIP 24994 |
17.76 |
| 2026-05-29 12:00 |
05:22:16.55 |
+23:59:21.0 |
HIP 24994 |
20.71 |
| 2026-05-30 00:00 |
05:23:57.54 |
+24:01:16.9 |
HIP 25306 |
12.60 |
| 2026-05-30 12:00 |
05:25:38.34 |
+24:03:08.5 |
HIP 25306 |
11.94 |
| 2026-05-31 00:00 |
05:27:18.95 |
+24:04:55.6 |
HIP 25498 |
8.06 |
| 2026-05-31 12:00 |
05:28:59.37 |
+24:06:38.5 |
HIP 25687 |
6.57 |
| 2026-06-01 00:00 |
05:30:39.59 |
+24:08:17.1 |
HIP 25687 |
21.40 |
| 2026-06-01 12:00 |
05:32:19.61 |
+24:09:51.5 |
HIP 26062 |
32.24 |
| 2026-06-02 00:00 |
05:33:59.43 |
+24:11:21.6 |
HIP 26201 |
15.84 |