メタデータ
| 項目 |
値 |
| Designation |
324P/La Sagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-06-22T17:16:10.848000Z |
| Orbit solution date (soln_date, UTC) |
2026-09-08T09:12:25Z |
| Obs used |
507 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
24.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-03-06.0000000 |
| e |
0.15380530 |
| q (au) |
2.617848 |
| a (au) |
3.093672 |
| i (deg) |
21.420134 |
| Ω (om, deg) |
270.651304 |
| ω (w, deg) |
58.871026 |
| M (ma, deg) |
178.827083 |
等級
散乱 + 全体線形
$$
M_a = (16.306 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.306 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.506 |
| k |
1.000 |
| δ90 |
2.437 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
19:51:47.20 |
+01:48:44.7 |
HIP 97732 |
3.03 |
| 2026-09-20 12:00 |
19:51:51.30 |
+01:47:42.8 |
HIP 97732 |
3.09 |
| 2026-09-21 00:00 |
19:51:55.80 |
+01:46:40.9 |
HIP 97732 |
3.86 |
| 2026-09-21 12:00 |
19:52:00.69 |
+01:45:39.2 |
HIP 97732 |
5.08 |
| 2026-09-22 00:00 |
19:52:05.97 |
+01:44:37.6 |
HIP 97732 |
6.57 |
| 2026-09-22 12:00 |
19:52:11.64 |
+01:43:36.1 |
HIP 97762 |
7.90 |
| 2026-09-23 00:00 |
19:52:17.70 |
+01:42:34.9 |
HIP 97762 |
7.69 |
| 2026-09-23 12:00 |
19:52:24.14 |
+01:41:33.8 |
HIP 97762 |
7.97 |
| 2026-09-24 00:00 |
19:52:30.97 |
+01:40:33.0 |
HIP 97762 |
8.76 |
| 2026-09-24 12:00 |
19:52:38.19 |
+01:39:32.5 |
HIP 97762 |
9.98 |
| 2026-09-25 00:00 |
19:52:45.78 |
+01:38:32.2 |
HIP 97762 |
11.55 |
| 2026-09-25 12:00 |
19:52:53.76 |
+01:37:32.3 |
HIP 97762 |
13.37 |
| 2026-09-26 00:00 |
19:53:02.11 |
+01:36:32.6 |
HIP 97762 |
15.39 |
| 2026-09-26 12:00 |
19:53:10.84 |
+01:35:33.3 |
HIP 97762 |
17.58 |
| 2026-09-27 00:00 |
19:53:19.95 |
+01:34:34.4 |
HIP 97762 |
19.91 |
| 2026-09-27 12:00 |
19:53:29.43 |
+01:33:35.9 |
HIP 97762 |
22.37 |
| 2026-09-28 00:00 |
19:53:39.28 |
+01:32:37.8 |
HIP 97762 |
24.93 |
| 2026-09-28 12:00 |
19:53:49.49 |
+01:31:40.2 |
HIP 97940 |
25.77 |
| 2026-09-29 00:00 |
19:54:00.08 |
+01:30:42.9 |
HIP 97940 |
26.19 |
| 2026-09-29 12:00 |
19:54:11.03 |
+01:29:46.2 |
HIP 97940 |
26.89 |
| 2026-09-30 00:00 |
19:54:22.35 |
+01:28:50.0 |
HIP 97950 |
27.70 |
| 2026-09-30 12:00 |
19:54:34.03 |
+01:27:54.3 |
HIP 97950 |
28.69 |
| 2026-10-01 00:00 |
19:54:46.06 |
+01:26:59.1 |
HIP 97950 |
29.97 |
| 2026-10-01 12:00 |
19:54:58.46 |
+01:26:04.5 |
HIP 97950 |
31.53 |
| 2026-10-02 00:00 |
19:55:11.22 |
+01:25:10.5 |
HIP 98147 |
30.46 |
| 2026-10-02 12:00 |
19:55:24.33 |
+01:24:17.1 |
HIP 98147 |
27.38 |
| 2026-10-03 00:00 |
19:55:37.80 |
+01:23:24.3 |
HIP 98147 |
24.33 |
| 2026-10-03 12:00 |
19:55:51.61 |
+01:22:32.1 |
HIP 98147 |
21.36 |
| 2026-10-04 00:00 |
19:56:05.78 |
+01:21:40.6 |
HIP 98147 |
18.57 |
| 2026-10-04 12:00 |
19:56:20.30 |
+01:20:49.8 |
HIP 98147 |
16.09 |
| 2026-10-05 00:00 |
19:56:35.17 |
+01:19:59.7 |
HIP 98147 |
14.16 |
| 2026-10-05 12:00 |
19:56:50.38 |
+01:19:10.3 |
HIP 98147 |
13.10 |
| 2026-10-06 00:00 |
19:57:05.94 |
+01:18:21.7 |
HIP 98147 |
13.20 |
| 2026-10-06 12:00 |
19:57:21.84 |
+01:17:33.8 |
HIP 98147 |
14.49 |
| 2026-10-07 00:00 |
19:57:38.08 |
+01:16:46.7 |
HIP 98147 |
16.77 |
| 2026-10-07 12:00 |
19:57:54.66 |
+01:16:00.5 |
HIP 98147 |
19.75 |
| 2026-10-08 00:00 |
19:58:11.57 |
+01:15:15.0 |
HIP 98385 |
19.24 |
| 2026-10-08 12:00 |
19:58:28.82 |
+01:14:30.4 |
HIP 98385 |
15.72 |
| 2026-10-09 00:00 |
19:58:46.41 |
+01:13:46.7 |
HIP 98385 |
12.68 |
| 2026-10-09 12:00 |
19:59:04.33 |
+01:13:03.8 |
HIP 98385 |
10.62 |
| 2026-10-10 00:00 |
19:59:22.57 |
+01:12:21.9 |
HIP 98385 |
10.29 |
| 2026-10-10 12:00 |
19:59:41.15 |
+01:11:40.9 |
HIP 98385 |
11.91 |
| 2026-10-11 00:00 |
20:00:00.04 |
+01:11:00.8 |
HIP 98385 |
14.93 |