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) |
| 2026-03-26 00:00 |
07:53:31.44 |
+08:29:11.8 |
HIP 38472 |
30.65 |
| 2026-03-26 12:00 |
07:53:29.64 |
+08:29:48.6 |
HIP 38472 |
31.07 |
| 2026-03-27 00:00 |
07:53:27.91 |
+08:30:25.3 |
HIP 38472 |
31.50 |
| 2026-03-27 12:00 |
07:53:26.26 |
+08:31:01.8 |
HIP 38472 |
31.95 |
| 2026-03-28 00:00 |
07:53:24.68 |
+08:31:38.1 |
HIP 38472 |
32.41 |
| 2026-03-28 12:00 |
07:53:23.17 |
+08:32:14.3 |
HIP 38472 |
32.88 |
| 2026-03-29 00:00 |
07:53:21.74 |
+08:32:50.4 |
HIP 38472 |
33.37 |
| 2026-03-29 12:00 |
07:53:20.37 |
+08:33:26.2 |
HIP 38708 |
33.68 |
| 2026-03-30 00:00 |
07:53:19.09 |
+08:34:01.9 |
HIP 38708 |
33.82 |
| 2026-03-30 12:00 |
07:53:17.87 |
+08:34:37.5 |
HIP 38708 |
33.95 |
| 2026-03-31 00:00 |
07:53:16.73 |
+08:35:12.8 |
HIP 38708 |
34.08 |
| 2026-03-31 12:00 |
07:53:15.66 |
+08:35:48.0 |
HIP 38368 |
34.14 |
| 2026-04-01 00:00 |
07:53:14.67 |
+08:36:23.0 |
HIP 38368 |
33.56 |
| 2026-04-01 12:00 |
07:53:13.74 |
+08:36:57.8 |
HIP 38368 |
32.99 |
| 2026-04-02 00:00 |
07:53:12.90 |
+08:37:32.5 |
HIP 38368 |
32.45 |
| 2026-04-02 12:00 |
07:53:12.12 |
+08:38:07.0 |
HIP 38368 |
31.92 |
| 2026-04-03 00:00 |
07:53:11.42 |
+08:38:41.2 |
HIP 38368 |
31.40 |
| 2026-04-03 12:00 |
07:53:10.79 |
+08:39:15.3 |
HIP 38368 |
30.91 |
| 2026-04-04 00:00 |
07:53:10.24 |
+08:39:49.2 |
HIP 38368 |
30.44 |
| 2026-04-04 12:00 |
07:53:09.76 |
+08:40:23.0 |
HIP 38368 |
29.98 |
| 2026-04-05 00:00 |
07:53:09.35 |
+08:40:56.5 |
HIP 38368 |
29.55 |
| 2026-04-05 12:00 |
07:53:09.02 |
+08:41:29.8 |
HIP 38368 |
29.14 |
| 2026-04-06 00:00 |
07:53:08.76 |
+08:42:02.9 |
HIP 38368 |
28.74 |
| 2026-04-06 12:00 |
07:53:08.57 |
+08:42:35.9 |
HIP 38368 |
28.38 |
| 2026-04-07 00:00 |
07:53:08.46 |
+08:43:08.6 |
HIP 38368 |
28.03 |
| 2026-04-07 12:00 |
07:53:08.42 |
+08:43:41.1 |
HIP 38368 |
27.70 |
| 2026-04-08 00:00 |
07:53:08.45 |
+08:44:13.5 |
HIP 38368 |
27.40 |
| 2026-04-08 12:00 |
07:53:08.56 |
+08:44:45.6 |
HIP 38368 |
27.13 |
| 2026-04-09 00:00 |
07:53:08.74 |
+08:45:17.5 |
HIP 38368 |
26.88 |
| 2026-04-09 12:00 |
07:53:08.99 |
+08:45:49.2 |
HIP 38368 |
26.65 |
| 2026-04-10 00:00 |
07:53:09.32 |
+08:46:20.7 |
HIP 38368 |
26.46 |
| 2026-04-10 12:00 |
07:53:09.72 |
+08:46:52.0 |
HIP 38368 |
26.28 |
| 2026-04-11 00:00 |
07:53:10.19 |
+08:47:23.0 |
HIP 38368 |
26.14 |
| 2026-04-11 12:00 |
07:53:10.74 |
+08:47:53.9 |
HIP 38368 |
26.02 |
| 2026-04-12 00:00 |
07:53:11.36 |
+08:48:24.5 |
HIP 38368 |
25.93 |
| 2026-04-12 12:00 |
07:53:12.05 |
+08:48:54.9 |
HIP 38368 |
25.87 |
| 2026-04-13 00:00 |
07:53:12.82 |
+08:49:25.1 |
HIP 38368 |
25.84 |
| 2026-04-13 12:00 |
07:53:13.66 |
+08:49:55.0 |
HIP 38368 |
25.84 |
| 2026-04-14 00:00 |
07:53:14.57 |
+08:50:24.7 |
HIP 38368 |
25.87 |
| 2026-04-14 12:00 |
07:53:15.56 |
+08:50:54.2 |
HIP 38368 |
25.93 |
| 2026-04-15 00:00 |
07:53:16.62 |
+08:51:23.5 |
HIP 38368 |
26.01 |
| 2026-04-15 12:00 |
07:53:17.75 |
+08:51:52.5 |
HIP 38368 |
26.13 |
| 2026-04-16 00:00 |
07:53:18.95 |
+08:52:21.3 |
HIP 38368 |
26.28 |