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) |
| 2026-05-12 00:00 |
07:55:56.28 |
+09:11:21.1 |
HIP 38682 |
14.76 |
| 2026-05-12 12:00 |
07:56:01.01 |
+09:11:35.7 |
HIP 38829 |
14.29 |
| 2026-05-13 00:00 |
07:56:05.80 |
+09:11:50.0 |
HIP 38829 |
13.53 |
| 2026-05-13 12:00 |
07:56:10.64 |
+09:12:04.0 |
HIP 38829 |
12.83 |
| 2026-05-14 00:00 |
07:56:15.55 |
+09:12:17.8 |
HIP 38829 |
12.19 |
| 2026-05-14 12:00 |
07:56:20.51 |
+09:12:31.2 |
HIP 38829 |
11.63 |
| 2026-05-15 00:00 |
07:56:25.53 |
+09:12:44.3 |
HIP 38829 |
11.17 |
| 2026-05-15 12:00 |
07:56:30.61 |
+09:12:57.2 |
HIP 38829 |
10.84 |
| 2026-05-16 00:00 |
07:56:35.75 |
+09:13:09.7 |
HIP 38829 |
10.63 |
| 2026-05-16 12:00 |
07:56:40.94 |
+09:13:22.0 |
HIP 38829 |
10.58 |
| 2026-05-17 00:00 |
07:56:46.19 |
+09:13:34.0 |
HIP 38829 |
10.67 |
| 2026-05-17 12:00 |
07:56:51.49 |
+09:13:45.6 |
HIP 38829 |
10.92 |
| 2026-05-18 00:00 |
07:56:56.86 |
+09:13:57.0 |
HIP 38829 |
11.32 |
| 2026-05-18 12:00 |
07:57:02.27 |
+09:14:08.1 |
HIP 38829 |
11.86 |
| 2026-05-19 00:00 |
07:57:07.75 |
+09:14:18.8 |
HIP 38829 |
12.52 |
| 2026-05-19 12:00 |
07:57:13.28 |
+09:14:29.3 |
HIP 38829 |
13.29 |
| 2026-05-20 00:00 |
07:57:18.86 |
+09:14:39.5 |
HIP 38829 |
14.15 |
| 2026-05-20 12:00 |
07:57:24.49 |
+09:14:49.4 |
HIP 38829 |
15.10 |
| 2026-05-21 00:00 |
07:57:30.18 |
+09:14:59.0 |
HIP 38829 |
16.12 |
| 2026-05-21 12:00 |
07:57:35.93 |
+09:15:08.3 |
HIP 38829 |
17.20 |
| 2026-05-22 00:00 |
07:57:41.72 |
+09:15:17.3 |
HIP 38829 |
18.34 |
| 2026-05-22 12:00 |
07:57:47.57 |
+09:15:26.0 |
HIP 38829 |
19.52 |
| 2026-05-23 00:00 |
07:57:53.47 |
+09:15:34.4 |
HIP 38829 |
20.74 |
| 2026-05-23 12:00 |
07:57:59.42 |
+09:15:42.5 |
HIP 38829 |
22.00 |
| 2026-05-24 00:00 |
07:58:05.42 |
+09:15:50.3 |
HIP 38829 |
23.29 |
| 2026-05-24 12:00 |
07:58:11.47 |
+09:15:57.8 |
HIP 38829 |
24.61 |
| 2026-05-25 00:00 |
07:58:17.58 |
+09:16:05.0 |
HIP 38829 |
25.96 |
| 2026-05-25 12:00 |
07:58:23.73 |
+09:16:11.9 |
HIP 38829 |
27.34 |
| 2026-05-26 00:00 |
07:58:29.93 |
+09:16:18.5 |
HIP 38829 |
28.74 |
| 2026-05-26 12:00 |
07:58:36.18 |
+09:16:24.9 |
HIP 38829 |
30.16 |
| 2026-05-27 00:00 |
07:58:42.48 |
+09:16:30.9 |
HIP 39134 |
29.87 |
| 2026-05-27 12:00 |
07:58:48.83 |
+09:16:36.6 |
HIP 39134 |
28.70 |
| 2026-05-28 00:00 |
07:58:55.23 |
+09:16:42.1 |
HIP 39134 |
27.55 |
| 2026-05-28 12:00 |
07:59:01.67 |
+09:16:47.2 |
HIP 39134 |
26.44 |
| 2026-05-29 00:00 |
07:59:08.16 |
+09:16:52.1 |
HIP 39134 |
25.37 |
| 2026-05-29 12:00 |
07:59:14.70 |
+09:16:56.6 |
HIP 39134 |
24.35 |
| 2026-05-30 00:00 |
07:59:21.28 |
+09:17:00.9 |
HIP 39134 |
23.38 |
| 2026-05-30 12:00 |
07:59:27.91 |
+09:17:04.8 |
HIP 39134 |
22.48 |
| 2026-05-31 00:00 |
07:59:34.59 |
+09:17:08.5 |
HIP 39134 |
21.65 |
| 2026-05-31 12:00 |
07:59:41.31 |
+09:17:11.9 |
HIP 39134 |
20.91 |
| 2026-06-01 00:00 |
07:59:48.07 |
+09:17:15.0 |
HIP 39134 |
20.27 |
| 2026-06-01 12:00 |
07:59:54.88 |
+09:17:17.8 |
HIP 39134 |
19.75 |
| 2026-06-02 00:00 |
08:00:01.74 |
+09:17:20.3 |
HIP 39134 |
19.35 |