メタデータ
| 項目 |
値 |
| Designation |
351P/Wiegert-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-26T13:54:44.982720Z |
| Orbit solution date (soln_date, UTC) |
2026-09-15T13:42:29Z |
| Obs used |
344 |
| NEO |
- |
| M1 |
5.000 |
| K1 |
23.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-10-20.0000000 |
| e |
0.29487330 |
| q (au) |
3.130796 |
| a (au) |
4.440047 |
| i (deg) |
12.776664 |
| Ω (om, deg) |
283.400431 |
| ω (w, deg) |
352.645775 |
| M (ma, deg) |
304.842390 |
等級
散乱 + 全体線形
$$
M_a = (12.665 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.665 |
| n |
2.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-25 00:00 |
00:04:21.78 |
+18:45:53.7 |
HIP 206 |
25.57 |
| 2026-09-25 12:00 |
00:04:02.99 |
+18:44:08.9 |
HIP 201 |
21.44 |
| 2026-09-26 00:00 |
00:03:44.22 |
+18:42:22.5 |
HIP 201 |
16.82 |
| 2026-09-26 12:00 |
00:03:25.48 |
+18:40:34.6 |
HIP 201 |
12.33 |
| 2026-09-27 00:00 |
00:03:06.76 |
+18:38:45.2 |
HIP 201 |
8.21 |
| 2026-09-27 12:00 |
00:02:48.08 |
+18:36:54.3 |
HIP 201 |
5.37 |
| 2026-09-28 00:00 |
00:02:29.42 |
+18:35:02.0 |
HIP 201 |
6.04 |
| 2026-09-28 12:00 |
00:02:10.81 |
+18:33:08.3 |
HIP 201 |
9.52 |
| 2026-09-29 00:00 |
00:01:52.24 |
+18:31:13.1 |
HIP 201 |
13.82 |
| 2026-09-29 12:00 |
00:01:33.71 |
+18:29:16.6 |
HIP 201 |
18.38 |
| 2026-09-30 00:00 |
00:01:15.24 |
+18:27:18.7 |
HIP 201 |
23.04 |
| 2026-09-30 12:00 |
00:00:56.81 |
+18:25:19.4 |
HIP 54 |
27.62 |
| 2026-10-01 00:00 |
00:00:38.45 |
+18:23:18.9 |
HIP 54 |
25.18 |
| 2026-10-01 12:00 |
00:00:20.14 |
+18:21:17.1 |
HIP 54 |
23.47 |
| 2026-10-02 00:00 |
00:00:01.90 |
+18:19:14.1 |
HIP 54 |
22.63 |
| 2026-10-02 12:00 |
23:59:43.73 |
+18:17:09.8 |
HIP 54 |
22.77 |
| 2026-10-03 00:00 |
23:59:25.63 |
+18:15:04.3 |
HIP 54 |
23.86 |
| 2026-10-03 12:00 |
23:59:07.61 |
+18:12:57.7 |
HIP 118111 |
22.87 |
| 2026-10-04 00:00 |
23:58:49.66 |
+18:10:49.9 |
HIP 118111 |
18.99 |
| 2026-10-04 12:00 |
23:58:31.80 |
+18:08:41.0 |
HIP 118111 |
15.62 |
| 2026-10-05 00:00 |
23:58:14.03 |
+18:06:31.0 |
HIP 118111 |
13.16 |
| 2026-10-05 12:00 |
23:57:56.35 |
+18:04:19.9 |
HIP 118111 |
12.17 |
| 2026-10-06 00:00 |
23:57:38.76 |
+18:02:07.9 |
HIP 118111 |
12.98 |
| 2026-10-06 12:00 |
23:57:21.27 |
+17:59:54.8 |
HIP 118111 |
15.29 |
| 2026-10-07 00:00 |
23:57:03.89 |
+17:57:40.8 |
HIP 118111 |
18.53 |
| 2026-10-07 12:00 |
23:56:46.61 |
+17:55:25.9 |
HIP 118111 |
22.31 |
| 2026-10-08 00:00 |
23:56:29.44 |
+17:53:10.0 |
HIP 118111 |
26.37 |
| 2026-10-08 12:00 |
23:56:12.39 |
+17:50:53.3 |
HIP 118111 |
30.60 |
| 2026-10-09 00:00 |
23:55:55.45 |
+17:48:35.7 |
HIP 117846 |
30.64 |
| 2026-10-09 12:00 |
23:55:38.63 |
+17:46:17.4 |
HIP 117846 |
26.03 |
| 2026-10-10 00:00 |
23:55:21.94 |
+17:43:58.3 |
HIP 117846 |
21.42 |
| 2026-10-10 12:00 |
23:55:05.38 |
+17:41:38.4 |
HIP 117846 |
16.84 |
| 2026-10-11 00:00 |
23:54:48.94 |
+17:39:17.9 |
HIP 117846 |
12.28 |
| 2026-10-11 12:00 |
23:54:32.65 |
+17:36:56.6 |
HIP 117846 |
7.74 |
| 2026-10-12 00:00 |
23:54:16.49 |
+17:34:34.8 |
HIP 117846 |
3.22 |
| 2026-10-12 12:00 |
23:54:00.47 |
+17:32:12.3 |
HIP 117846 |
1.28 |
| 2026-10-13 00:00 |
23:53:44.60 |
+17:29:49.3 |
HIP 117846 |
5.75 |
| 2026-10-13 12:00 |
23:53:28.88 |
+17:27:25.7 |
HIP 117846 |
10.20 |
| 2026-10-14 00:00 |
23:53:13.30 |
+17:25:01.6 |
HIP 117846 |
14.62 |
| 2026-10-14 12:00 |
23:52:57.88 |
+17:22:37.1 |
HIP 117846 |
19.02 |
| 2026-10-15 00:00 |
23:52:42.62 |
+17:20:12.1 |
HIP 117846 |
23.39 |
| 2026-10-15 12:00 |
23:52:27.52 |
+17:17:46.8 |
HIP 117577 |
25.75 |
| 2026-10-16 00:00 |
23:52:12.58 |
+17:15:21.0 |
HIP 117577 |
22.66 |