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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
10:53:38.26 |
-00:59:40.7 |
HIP 53267 |
21.57 |
| 2026-09-20 12:00 |
10:54:22.63 |
-01:06:45.6 |
HIP 53267 |
18.01 |
| 2026-09-21 00:00 |
10:55:07.02 |
-01:13:51.2 |
HIP 53441 |
18.62 |
| 2026-09-21 12:00 |
10:55:51.41 |
-01:20:57.6 |
HIP 53501 |
16.36 |
| 2026-09-22 00:00 |
10:56:35.82 |
-01:28:04.7 |
HIP 53454 |
11.81 |
| 2026-09-22 12:00 |
10:57:20.23 |
-01:35:12.7 |
HIP 53454 |
18.83 |
| 2026-09-23 00:00 |
10:58:04.66 |
-01:42:21.4 |
HIP 53454 |
30.30 |
| 2026-09-23 12:00 |
10:58:49.09 |
-01:49:30.9 |
HIP 53751 |
18.27 |
| 2026-09-24 00:00 |
10:59:33.54 |
-01:56:41.2 |
HIP 53751 |
5.06 |
| 2026-09-24 12:00 |
11:00:18.00 |
-02:03:52.3 |
HIP 53751 |
8.19 |
| 2026-09-25 00:00 |
11:01:02.47 |
-02:11:04.1 |
HIP 53875 |
17.25 |
| 2026-09-25 12:00 |
11:01:46.94 |
-02:18:16.7 |
HIP 53907 |
10.81 |
| 2026-09-26 00:00 |
11:02:31.43 |
-02:25:30.1 |
HIP 53907 |
11.02 |
| 2026-09-26 12:00 |
11:03:15.93 |
-02:32:44.3 |
HIP 54013 |
7.01 |
| 2026-09-27 00:00 |
11:04:00.44 |
-02:39:59.2 |
HIP 54158 |
14.33 |
| 2026-09-27 12:00 |
11:04:44.96 |
-02:47:14.9 |
HIP 54156 |
11.10 |
| 2026-09-28 00:00 |
11:05:29.50 |
-02:54:31.4 |
HIP 54156 |
12.38 |
| 2026-09-28 12:00 |
11:06:14.04 |
-03:01:48.6 |
HIP 54156 |
23.16 |
| 2026-09-29 00:00 |
11:06:58.59 |
-03:09:06.7 |
HIP 54156 |
35.69 |
| 2026-09-29 12:00 |
11:07:43.16 |
-03:16:25.5 |
HIP 54546 |
34.49 |
| 2026-09-30 00:00 |
11:08:27.73 |
-03:23:45.0 |
HIP 54435 |
30.15 |
| 2026-09-30 12:00 |
11:09:12.32 |
-03:31:05.4 |
HIP 54435 |
26.42 |
| 2026-10-01 00:00 |
11:09:56.92 |
-03:38:26.5 |
HIP 54435 |
29.02 |
| 2026-10-01 12:00 |
11:10:41.53 |
-03:45:48.4 |
HIP 54781 |
33.93 |
| 2026-10-02 00:00 |
11:11:26.15 |
-03:53:11.1 |
HIP 54781 |
22.78 |
| 2026-10-02 12:00 |
11:12:10.78 |
-04:00:34.5 |
HIP 54781 |
15.61 |
| 2026-10-03 00:00 |
11:12:55.43 |
-04:07:58.7 |
HIP 54781 |
18.05 |
| 2026-10-03 12:00 |
11:13:40.08 |
-04:15:23.7 |
HIP 54781 |
27.68 |
| 2026-10-04 00:00 |
11:14:24.75 |
-04:22:49.4 |
HIP 54973 |
36.25 |
| 2026-10-04 12:00 |
11:15:09.42 |
-04:30:15.9 |
HIP 54973 |
25.99 |
| 2026-10-05 00:00 |
11:15:54.11 |
-04:37:43.2 |
HIP 54973 |
19.86 |
| 2026-10-05 12:00 |
11:16:38.81 |
-04:45:11.2 |
HIP 54973 |
21.74 |
| 2026-10-06 00:00 |
11:17:23.51 |
-04:52:40.0 |
HIP 55210 |
18.38 |
| 2026-10-06 12:00 |
11:18:08.23 |
-05:00:09.5 |
HIP 55210 |
5.09 |
| 2026-10-07 00:00 |
11:18:52.96 |
-05:07:39.8 |
HIP 55210 |
8.63 |
| 2026-10-07 12:00 |
11:19:37.69 |
-05:15:10.8 |
HIP 55210 |
22.00 |
| 2026-10-08 00:00 |
11:20:22.44 |
-05:22:42.6 |
HIP 55482 |
29.29 |
| 2026-10-08 12:00 |
11:21:07.19 |
-05:30:15.2 |
HIP 55482 |
16.21 |
| 2026-10-09 00:00 |
11:21:51.96 |
-05:37:48.4 |
HIP 55482 |
5.45 |
| 2026-10-09 12:00 |
11:22:36.73 |
-05:45:22.4 |
HIP 55482 |
12.60 |
| 2026-10-10 00:00 |
11:23:21.51 |
-05:52:57.2 |
HIP 55666 |
15.08 |
| 2026-10-10 12:00 |
11:24:06.30 |
-06:00:32.7 |
HIP 55666 |
7.10 |
| 2026-10-11 00:00 |
11:24:51.09 |
-06:08:08.9 |
HIP 55666 |
15.39 |