P/2016 P1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2016 P1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-09-08T07:16:06.602880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:26Z |
| Obs used |
40 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-08-06.0000000 |
| e |
0.29419825 |
| q (au) |
2.279185 |
| a (au) |
3.229214 |
| i (deg) |
25.706555 |
| Ω (om, deg) |
319.536773 |
| ω (w, deg) |
267.536803 |
| M (ma, deg) |
56.507743 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.843 |
| k |
0.985 |
| δ90 |
9.996 |
| 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 |
07:53:57.27 |
+33:27:18.0 |
HIP 38469 |
16.48 |
| 2026-02-03 12:00 |
07:53:25.12 |
+33:25:12.8 |
HIP 38469 |
12.35 |
| 2026-02-04 00:00 |
07:52:53.17 |
+33:23:05.5 |
HIP 38469 |
11.53 |
| 2026-02-04 12:00 |
07:52:21.44 |
+33:20:56.1 |
HIP 38469 |
14.54 |
| 2026-02-05 00:00 |
07:51:49.93 |
+33:18:44.6 |
HIP 38319 |
11.01 |
| 2026-02-05 12:00 |
07:51:18.65 |
+33:16:31.1 |
HIP 38319 |
4.22 |
| 2026-02-06 00:00 |
07:50:47.60 |
+33:14:15.6 |
HIP 38319 |
3.10 |
| 2026-02-06 12:00 |
07:50:16.80 |
+33:11:58.1 |
HIP 38319 |
9.75 |
| 2026-02-07 00:00 |
07:49:46.24 |
+33:09:38.5 |
HIP 38319 |
16.52 |
| 2026-02-07 12:00 |
07:49:15.94 |
+33:07:17.0 |
HIP 38148 |
12.86 |
| 2026-02-08 00:00 |
07:48:45.90 |
+33:04:53.6 |
HIP 38148 |
10.70 |
| 2026-02-08 12:00 |
07:48:16.13 |
+33:02:28.2 |
HIP 38148 |
12.35 |
| 2026-02-09 00:00 |
07:47:46.63 |
+33:00:01.0 |
HIP 38148 |
16.69 |
| 2026-02-09 12:00 |
07:47:17.41 |
+32:57:31.9 |
HIP 38080 |
20.15 |
| 2026-02-10 00:00 |
07:46:48.48 |
+32:55:00.9 |
HIP 38080 |
22.65 |
| 2026-02-10 12:00 |
07:46:19.84 |
+32:52:28.1 |
HIP 38080 |
26.52 |
| 2026-02-11 00:00 |
07:45:51.49 |
+32:49:53.5 |
HIP 38080 |
31.23 |
| 2026-02-11 12:00 |
07:45:23.45 |
+32:47:17.1 |
HIP 37633 |
26.80 |
| 2026-02-12 00:00 |
07:44:55.72 |
+32:44:38.9 |
HIP 37633 |
20.50 |
| 2026-02-12 12:00 |
07:44:28.31 |
+32:41:59.0 |
HIP 37633 |
14.33 |
| 2026-02-13 00:00 |
07:44:01.21 |
+32:39:17.5 |
HIP 37633 |
8.51 |
| 2026-02-13 12:00 |
07:43:34.44 |
+32:36:34.2 |
HIP 37633 |
4.40 |
| 2026-02-14 00:00 |
07:43:07.99 |
+32:33:49.3 |
HIP 37633 |
6.68 |
| 2026-02-14 12:00 |
07:42:41.89 |
+32:31:02.8 |
HIP 37633 |
12.10 |
| 2026-02-15 00:00 |
07:42:16.12 |
+32:28:14.7 |
HIP 37633 |
17.96 |
| 2026-02-15 12:00 |
07:41:50.70 |
+32:25:25.0 |
HIP 37633 |
23.91 |
| 2026-02-16 00:00 |
07:41:25.62 |
+32:22:33.8 |
HIP 37326 |
21.18 |
| 2026-02-16 12:00 |
07:41:00.90 |
+32:19:41.0 |
HIP 37326 |
16.10 |
| 2026-02-17 00:00 |
07:40:36.54 |
+32:16:46.8 |
HIP 37326 |
11.95 |
| 2026-02-17 12:00 |
07:40:12.54 |
+32:13:51.1 |
HIP 37326 |
9.87 |
| 2026-02-18 00:00 |
07:39:48.90 |
+32:10:54.0 |
HIP 37339 |
10.37 |
| 2026-02-18 12:00 |
07:39:25.63 |
+32:07:55.5 |
HIP 37339 |
9.50 |
| 2026-02-19 00:00 |
07:39:02.74 |
+32:04:55.6 |
HIP 37339 |
11.72 |
| 2026-02-19 12:00 |
07:38:40.22 |
+32:01:54.4 |
HIP 37339 |
15.71 |
| 2026-02-20 00:00 |
07:38:18.09 |
+31:58:51.9 |
HIP 37339 |
20.43 |
| 2026-02-20 12:00 |
07:37:56.33 |
+31:55:48.0 |
HIP 37108 |
19.72 |
| 2026-02-21 00:00 |
07:37:34.97 |
+31:52:43.0 |
HIP 37108 |
15.91 |
| 2026-02-21 12:00 |
07:37:13.99 |
+31:49:36.7 |
HIP 37108 |
13.29 |
| 2026-02-22 00:00 |
07:36:53.40 |
+31:46:29.1 |
HIP 37108 |
12.56 |
| 2026-02-22 12:00 |
07:36:33.21 |
+31:43:20.5 |
HIP 37108 |
13.94 |
| 2026-02-23 00:00 |
07:36:13.42 |
+31:40:10.6 |
HIP 37108 |
16.87 |
| 2026-02-23 12:00 |
07:35:54.02 |
+31:36:59.7 |
HIP 37108 |
20.67 |
| 2026-02-24 00:00 |
07:35:35.02 |
+31:33:47.7 |
HIP 36850 |
23.21 |