P/2013 P1 (PANSTARRS)
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) |
| 2026-02-03 00:00 |
08:02:04.13 |
+07:22:24.8 |
HIP 39405 |
24.16 |
| 2026-02-03 12:00 |
08:01:56.79 |
+07:23:00.7 |
HIP 39405 |
25.96 |
| 2026-02-04 00:00 |
08:01:49.47 |
+07:23:36.8 |
HIP 39405 |
27.78 |
| 2026-02-04 12:00 |
08:01:42.18 |
+07:24:13.0 |
HIP 39405 |
29.61 |
| 2026-02-05 00:00 |
08:01:34.92 |
+07:24:49.5 |
HIP 39405 |
31.45 |
| 2026-02-05 12:00 |
08:01:27.68 |
+07:25:26.1 |
HIP 39181 |
31.18 |
| 2026-02-06 00:00 |
08:01:20.46 |
+07:26:02.8 |
HIP 39181 |
30.07 |
| 2026-02-06 12:00 |
08:01:13.28 |
+07:26:39.8 |
HIP 39181 |
29.05 |
| 2026-02-07 00:00 |
08:01:06.12 |
+07:27:16.9 |
HIP 39181 |
28.11 |
| 2026-02-07 12:00 |
08:00:58.99 |
+07:27:54.2 |
HIP 39181 |
27.26 |
| 2026-02-08 00:00 |
08:00:51.89 |
+07:28:31.6 |
HIP 39181 |
26.52 |
| 2026-02-08 12:00 |
08:00:44.82 |
+07:29:09.2 |
HIP 39181 |
25.90 |
| 2026-02-09 00:00 |
08:00:37.78 |
+07:29:46.9 |
HIP 39181 |
25.38 |
| 2026-02-09 12:00 |
08:00:30.78 |
+07:30:24.8 |
HIP 39181 |
25.00 |
| 2026-02-10 00:00 |
08:00:23.80 |
+07:31:02.8 |
HIP 39181 |
24.73 |
| 2026-02-10 12:00 |
08:00:16.86 |
+07:31:40.9 |
HIP 39181 |
24.60 |
| 2026-02-11 00:00 |
08:00:09.96 |
+07:32:19.2 |
HIP 39181 |
24.61 |
| 2026-02-11 12:00 |
08:00:03.09 |
+07:32:57.7 |
HIP 39181 |
24.73 |
| 2026-02-12 00:00 |
07:59:56.25 |
+07:33:36.2 |
HIP 39181 |
24.99 |
| 2026-02-12 12:00 |
07:59:49.46 |
+07:34:14.9 |
HIP 39032 |
25.24 |
| 2026-02-13 00:00 |
07:59:42.69 |
+07:34:53.7 |
HIP 39032 |
24.03 |
| 2026-02-13 12:00 |
07:59:35.97 |
+07:35:32.6 |
HIP 39032 |
22.90 |
| 2026-02-14 00:00 |
07:59:29.29 |
+07:36:11.7 |
HIP 39032 |
21.86 |
| 2026-02-14 12:00 |
07:59:22.64 |
+07:36:50.8 |
HIP 39032 |
20.92 |
| 2026-02-15 00:00 |
07:59:16.04 |
+07:37:30.1 |
HIP 39032 |
20.09 |
| 2026-02-15 12:00 |
07:59:09.48 |
+07:38:09.5 |
HIP 39032 |
19.38 |
| 2026-02-16 00:00 |
07:59:02.96 |
+07:38:48.9 |
HIP 39032 |
18.81 |
| 2026-02-16 12:00 |
07:58:56.48 |
+07:39:28.5 |
HIP 38930 |
18.19 |
| 2026-02-17 00:00 |
07:58:50.04 |
+07:40:08.2 |
HIP 38930 |
16.51 |
| 2026-02-17 12:00 |
07:58:43.65 |
+07:40:47.9 |
HIP 38930 |
14.85 |
| 2026-02-18 00:00 |
07:58:37.31 |
+07:41:27.7 |
HIP 38930 |
13.22 |
| 2026-02-18 12:00 |
07:58:31.00 |
+07:42:07.6 |
HIP 38930 |
11.61 |
| 2026-02-19 00:00 |
07:58:24.75 |
+07:42:47.6 |
HIP 38930 |
10.04 |
| 2026-02-19 12:00 |
07:58:18.54 |
+07:43:27.7 |
HIP 38930 |
8.52 |
| 2026-02-20 00:00 |
07:58:12.38 |
+07:44:07.8 |
HIP 38930 |
7.08 |
| 2026-02-20 12:00 |
07:58:06.26 |
+07:44:48.0 |
HIP 38930 |
5.76 |
| 2026-02-21 00:00 |
07:58:00.20 |
+07:45:28.3 |
HIP 38930 |
4.67 |
| 2026-02-21 12:00 |
07:57:54.18 |
+07:46:08.6 |
HIP 38930 |
3.97 |
| 2026-02-22 00:00 |
07:57:48.22 |
+07:46:49.0 |
HIP 38930 |
3.88 |
| 2026-02-22 12:00 |
07:57:42.30 |
+07:47:29.4 |
HIP 38930 |
4.41 |
| 2026-02-23 00:00 |
07:57:36.44 |
+07:48:09.9 |
HIP 38930 |
5.39 |
| 2026-02-23 12:00 |
07:57:30.63 |
+07:48:50.4 |
HIP 38930 |
6.59 |
| 2026-02-24 00:00 |
07:57:24.87 |
+07:49:30.9 |
HIP 38930 |
7.92 |