メタデータ
| 項目 |
値 |
| Designation |
P/2013 P1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-02-26T02:07:13.362240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:38Z |
| Obs used |
82 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-08-21.0000000 |
| e |
0.60522864 |
| q (au) |
3.390237 |
| a (au) |
8.587850 |
| i (deg) |
18.702011 |
| Ω (om, deg) |
160.795185 |
| ω (w, deg) |
138.108831 |
| M (ma, deg) |
6.889250 |
等級
散乱 + 全体線形
$$
M_a = (12.658 + 2.955\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.658 |
| n |
2.955 |
| gf |
1.000 |
| gb |
-0.929 |
| 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) |
| 2026-09-20 00:00 |
08:30:33.56 |
+07:53:02.6 |
HIP 41840 |
33.14 |
| 2026-09-20 12:00 |
08:30:39.88 |
+07:52:26.4 |
HIP 41840 |
32.83 |
| 2026-09-21 00:00 |
08:30:46.15 |
+07:51:50.3 |
HIP 41840 |
32.61 |
| 2026-09-21 12:00 |
08:30:52.38 |
+07:51:14.2 |
HIP 41840 |
32.47 |
| 2026-09-22 00:00 |
08:30:58.55 |
+07:50:38.1 |
HIP 41840 |
32.42 |
| 2026-09-22 12:00 |
08:31:04.67 |
+07:50:02.1 |
HIP 41840 |
32.46 |
| 2026-09-23 00:00 |
08:31:10.74 |
+07:49:26.2 |
HIP 41840 |
32.58 |
| 2026-09-23 12:00 |
08:31:16.76 |
+07:48:50.3 |
HIP 41840 |
32.79 |
| 2026-09-24 00:00 |
08:31:22.73 |
+07:48:14.4 |
HIP 41840 |
33.07 |
| 2026-09-24 12:00 |
08:31:28.65 |
+07:47:38.6 |
HIP 42000 |
32.64 |
| 2026-09-25 00:00 |
08:31:34.52 |
+07:47:02.8 |
HIP 42000 |
31.10 |
| 2026-09-25 12:00 |
08:31:40.33 |
+07:46:27.1 |
HIP 42000 |
29.59 |
| 2026-09-26 00:00 |
08:31:46.10 |
+07:45:51.5 |
HIP 42000 |
28.08 |
| 2026-09-26 12:00 |
08:31:51.81 |
+07:45:15.9 |
HIP 42000 |
26.60 |
| 2026-09-27 00:00 |
08:31:57.46 |
+07:44:40.4 |
HIP 42000 |
25.14 |
| 2026-09-27 12:00 |
08:32:03.07 |
+07:44:05.0 |
HIP 42000 |
23.69 |
| 2026-09-28 00:00 |
08:32:08.62 |
+07:43:29.6 |
HIP 42000 |
22.27 |
| 2026-09-28 12:00 |
08:32:14.12 |
+07:42:54.3 |
HIP 42000 |
20.87 |
| 2026-09-29 00:00 |
08:32:19.56 |
+07:42:19.1 |
HIP 42000 |
19.50 |
| 2026-09-29 12:00 |
08:32:24.95 |
+07:41:43.9 |
HIP 42000 |
18.16 |
| 2026-09-30 00:00 |
08:32:30.28 |
+07:41:08.9 |
HIP 42000 |
16.85 |
| 2026-09-30 12:00 |
08:32:35.56 |
+07:40:33.9 |
HIP 42000 |
15.57 |
| 2026-10-01 00:00 |
08:32:40.78 |
+07:39:59.0 |
HIP 42000 |
14.34 |
| 2026-10-01 12:00 |
08:32:45.94 |
+07:39:24.2 |
HIP 42000 |
13.17 |
| 2026-10-02 00:00 |
08:32:51.05 |
+07:38:49.4 |
HIP 42000 |
12.05 |
| 2026-10-02 12:00 |
08:32:56.11 |
+07:38:14.8 |
HIP 42000 |
11.01 |
| 2026-10-03 00:00 |
08:33:01.10 |
+07:37:40.2 |
HIP 42000 |
10.06 |
| 2026-10-03 12:00 |
08:33:06.04 |
+07:37:05.8 |
HIP 42000 |
9.23 |
| 2026-10-04 00:00 |
08:33:10.92 |
+07:36:31.5 |
HIP 42000 |
8.55 |
| 2026-10-04 12:00 |
08:33:15.74 |
+07:35:57.2 |
HIP 42000 |
8.03 |
| 2026-10-05 00:00 |
08:33:20.51 |
+07:35:23.1 |
HIP 42000 |
7.73 |
| 2026-10-05 12:00 |
08:33:25.21 |
+07:34:49.0 |
HIP 42000 |
7.64 |
| 2026-10-06 00:00 |
08:33:29.85 |
+07:34:15.1 |
HIP 42000 |
7.77 |
| 2026-10-06 12:00 |
08:33:34.44 |
+07:33:41.3 |
HIP 42000 |
8.11 |
| 2026-10-07 00:00 |
08:33:38.96 |
+07:33:07.6 |
HIP 42000 |
8.61 |
| 2026-10-07 12:00 |
08:33:43.43 |
+07:32:34.1 |
HIP 42000 |
9.26 |
| 2026-10-08 00:00 |
08:33:47.83 |
+07:32:00.6 |
HIP 42000 |
10.02 |
| 2026-10-08 12:00 |
08:33:52.17 |
+07:31:27.3 |
HIP 42000 |
10.85 |
| 2026-10-09 00:00 |
08:33:56.45 |
+07:30:54.1 |
HIP 42000 |
11.74 |
| 2026-10-09 12:00 |
08:34:00.67 |
+07:30:21.1 |
HIP 42000 |
12.67 |
| 2026-10-10 00:00 |
08:34:04.83 |
+07:29:48.2 |
HIP 42000 |
13.64 |
| 2026-10-10 12:00 |
08:34:08.92 |
+07:29:15.4 |
HIP 42000 |
14.62 |
| 2026-10-11 00:00 |
08:34:12.95 |
+07:28:42.8 |
HIP 42000 |
15.61 |