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) |
| 2026-07-29 00:00 |
08:16:09.30 |
+08:52:10.5 |
HIP 40526 |
19.70 |
| 2026-07-29 12:00 |
08:16:18.47 |
+08:51:43.6 |
HIP 40617 |
18.08 |
| 2026-07-30 00:00 |
08:16:27.64 |
+08:51:16.6 |
HIP 40617 |
15.83 |
| 2026-07-30 12:00 |
08:16:36.80 |
+08:50:49.3 |
HIP 40617 |
13.60 |
| 2026-07-31 00:00 |
08:16:45.96 |
+08:50:21.8 |
HIP 40617 |
11.40 |
| 2026-07-31 12:00 |
08:16:55.11 |
+08:49:54.2 |
HIP 40617 |
9.26 |
| 2026-08-01 00:00 |
08:17:04.25 |
+08:49:26.3 |
HIP 40617 |
7.23 |
| 2026-08-01 12:00 |
08:17:13.39 |
+08:48:58.3 |
HIP 40617 |
5.42 |
| 2026-08-02 00:00 |
08:17:22.52 |
+08:48:30.1 |
HIP 40617 |
4.15 |
| 2026-08-02 12:00 |
08:17:31.64 |
+08:48:01.8 |
HIP 40617 |
3.95 |
| 2026-08-03 00:00 |
08:17:40.76 |
+08:47:33.2 |
HIP 40617 |
4.96 |
| 2026-08-03 12:00 |
08:17:49.86 |
+08:47:04.5 |
HIP 40617 |
6.65 |
| 2026-08-04 00:00 |
08:17:58.96 |
+08:46:35.6 |
HIP 40617 |
8.63 |
| 2026-08-04 12:00 |
08:18:08.05 |
+08:46:06.6 |
HIP 40617 |
10.74 |
| 2026-08-05 00:00 |
08:18:17.13 |
+08:45:37.3 |
HIP 40617 |
12.91 |
| 2026-08-05 12:00 |
08:18:26.20 |
+08:45:07.9 |
HIP 40617 |
15.11 |
| 2026-08-06 00:00 |
08:18:35.26 |
+08:44:38.4 |
HIP 40617 |
17.34 |
| 2026-08-06 12:00 |
08:18:44.31 |
+08:44:08.6 |
HIP 40617 |
19.58 |
| 2026-08-07 00:00 |
08:18:53.35 |
+08:43:38.7 |
HIP 40617 |
21.83 |
| 2026-08-07 12:00 |
08:19:02.37 |
+08:43:08.7 |
HIP 40617 |
24.09 |
| 2026-08-08 00:00 |
08:19:11.39 |
+08:42:38.4 |
HIP 40911 |
25.85 |
| 2026-08-08 12:00 |
08:19:20.39 |
+08:42:08.1 |
HIP 40911 |
23.68 |
| 2026-08-09 00:00 |
08:19:29.38 |
+08:41:37.5 |
HIP 40911 |
21.54 |
| 2026-08-09 12:00 |
08:19:38.35 |
+08:41:06.8 |
HIP 40911 |
19.43 |
| 2026-08-10 00:00 |
08:19:47.31 |
+08:40:36.0 |
HIP 40911 |
17.36 |
| 2026-08-10 12:00 |
08:19:56.26 |
+08:40:05.0 |
HIP 40911 |
15.36 |
| 2026-08-11 00:00 |
08:20:05.19 |
+08:39:33.8 |
HIP 40911 |
13.45 |
| 2026-08-11 12:00 |
08:20:14.11 |
+08:39:02.5 |
HIP 40911 |
11.67 |
| 2026-08-12 00:00 |
08:20:23.01 |
+08:38:31.1 |
HIP 40911 |
10.09 |
| 2026-08-12 12:00 |
08:20:31.89 |
+08:37:59.5 |
HIP 40911 |
8.82 |
| 2026-08-13 00:00 |
08:20:40.76 |
+08:37:27.7 |
HIP 40911 |
8.00 |
| 2026-08-13 12:00 |
08:20:49.61 |
+08:36:55.9 |
HIP 40911 |
7.78 |
| 2026-08-14 00:00 |
08:20:58.45 |
+08:36:23.9 |
HIP 40911 |
8.19 |
| 2026-08-14 12:00 |
08:21:07.26 |
+08:35:51.7 |
HIP 40911 |
9.16 |
| 2026-08-15 00:00 |
08:21:16.06 |
+08:35:19.4 |
HIP 40911 |
10.52 |
| 2026-08-15 12:00 |
08:21:24.83 |
+08:34:47.0 |
HIP 40911 |
12.14 |
| 2026-08-16 00:00 |
08:21:33.59 |
+08:34:14.5 |
HIP 40911 |
13.93 |
| 2026-08-16 12:00 |
08:21:42.33 |
+08:33:41.8 |
HIP 40911 |
15.84 |
| 2026-08-17 00:00 |
08:21:51.04 |
+08:33:09.1 |
HIP 40911 |
17.81 |
| 2026-08-17 12:00 |
08:21:59.74 |
+08:32:36.1 |
HIP 40911 |
19.84 |
| 2026-08-18 00:00 |
08:22:08.42 |
+08:32:03.1 |
HIP 40911 |
21.90 |
| 2026-08-18 12:00 |
08:22:17.07 |
+08:31:30.0 |
HIP 41150 |
23.08 |
| 2026-08-19 00:00 |
08:22:25.70 |
+08:30:56.7 |
HIP 41150 |
20.87 |