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) |
| 2026-09-25 00:00 |
10:13:16.49 |
+13:03:19.6 |
HIP 50049 |
18.66 |
| 2026-09-25 12:00 |
10:14:05.26 |
+12:59:02.3 |
HIP 50049 |
20.30 |
| 2026-09-26 00:00 |
10:14:53.87 |
+12:54:45.4 |
HIP 50085 |
25.29 |
| 2026-09-26 12:00 |
10:15:42.30 |
+12:50:28.8 |
HIP 50357 |
18.62 |
| 2026-09-27 00:00 |
10:16:30.56 |
+12:46:12.7 |
HIP 50357 |
10.69 |
| 2026-09-27 12:00 |
10:17:18.65 |
+12:41:56.9 |
HIP 50357 |
13.94 |
| 2026-09-28 00:00 |
10:18:06.56 |
+12:37:41.6 |
HIP 50473 |
3.66 |
| 2026-09-28 12:00 |
10:18:54.31 |
+12:33:26.7 |
HIP 50473 |
8.88 |
| 2026-09-29 00:00 |
10:19:41.88 |
+12:29:12.2 |
HIP 50473 |
21.22 |
| 2026-09-29 12:00 |
10:20:29.28 |
+12:24:58.2 |
HIP 50802 |
31.67 |
| 2026-09-30 00:00 |
10:21:16.50 |
+12:20:44.6 |
HIP 50802 |
19.73 |
| 2026-09-30 12:00 |
10:22:03.56 |
+12:16:31.4 |
HIP 50802 |
8.82 |
| 2026-10-01 00:00 |
10:22:50.45 |
+12:12:18.8 |
HIP 50802 |
8.10 |
| 2026-10-01 12:00 |
10:23:37.16 |
+12:08:06.6 |
HIP 50802 |
18.71 |
| 2026-10-02 00:00 |
10:24:23.71 |
+12:03:54.9 |
HIP 50802 |
30.46 |
| 2026-10-02 12:00 |
10:25:10.08 |
+11:59:43.6 |
HIP 51120 |
36.77 |
| 2026-10-03 00:00 |
10:25:56.28 |
+11:55:32.9 |
HIP 51120 |
35.38 |
| 2026-10-03 12:00 |
10:26:42.31 |
+11:51:22.8 |
HIP 51179 |
33.18 |
| 2026-10-04 00:00 |
10:27:28.17 |
+11:47:13.1 |
HIP 51249 |
23.98 |
| 2026-10-04 12:00 |
10:28:13.86 |
+11:43:04.0 |
HIP 51249 |
18.20 |
| 2026-10-05 00:00 |
10:28:59.38 |
+11:38:55.4 |
HIP 51249 |
19.27 |
| 2026-10-05 12:00 |
10:29:44.72 |
+11:34:47.4 |
HIP 51249 |
26.32 |
| 2026-10-06 00:00 |
10:30:29.90 |
+11:30:39.9 |
HIP 51532 |
25.67 |
| 2026-10-06 12:00 |
10:31:14.90 |
+11:26:33.1 |
HIP 51532 |
17.02 |
| 2026-10-07 00:00 |
10:31:59.73 |
+11:22:26.8 |
HIP 51532 |
14.04 |
| 2026-10-07 12:00 |
10:32:44.38 |
+11:18:21.1 |
HIP 51532 |
19.46 |
| 2026-10-08 00:00 |
10:33:28.86 |
+11:14:16.1 |
HIP 51532 |
28.84 |
| 2026-10-08 12:00 |
10:34:13.17 |
+11:10:11.6 |
HIP 51945 |
37.81 |
| 2026-10-09 00:00 |
10:34:57.31 |
+11:06:07.9 |
HIP 51945 |
26.37 |
| 2026-10-09 12:00 |
10:35:41.27 |
+11:02:04.7 |
HIP 51945 |
15.16 |
| 2026-10-10 00:00 |
10:36:25.06 |
+10:58:02.2 |
HIP 51945 |
5.50 |
| 2026-10-10 12:00 |
10:37:08.67 |
+10:54:00.4 |
HIP 51997 |
6.67 |
| 2026-10-11 00:00 |
10:37:52.11 |
+10:49:59.3 |
HIP 51997 |
7.41 |
| 2026-10-11 12:00 |
10:38:35.37 |
+10:45:58.8 |
HIP 51997 |
17.99 |
| 2026-10-12 00:00 |
10:39:18.46 |
+10:41:59.0 |
HIP 52198 |
23.64 |
| 2026-10-12 12:00 |
10:40:01.37 |
+10:38:00.0 |
HIP 52198 |
18.33 |
| 2026-10-13 00:00 |
10:40:44.11 |
+10:34:01.7 |
HIP 52198 |
19.15 |
| 2026-10-13 12:00 |
10:41:26.67 |
+10:30:04.1 |
HIP 52373 |
15.09 |
| 2026-10-14 00:00 |
10:42:09.05 |
+10:26:07.2 |
HIP 52373 |
5.14 |
| 2026-10-14 12:00 |
10:42:51.26 |
+10:22:11.1 |
HIP 52373 |
8.54 |
| 2026-10-15 00:00 |
10:43:33.29 |
+10:18:15.7 |
HIP 52532 |
13.64 |
| 2026-10-15 12:00 |
10:44:15.14 |
+10:14:21.2 |
HIP 52532 |
8.57 |
| 2026-10-16 00:00 |
10:44:56.81 |
+10:10:27.3 |
HIP 52532 |
14.22 |