386P/PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
386P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-06-21T04:09:09.524160Z |
| Orbit solution date (soln_date, UTC) |
2021-05-31T22:43:09Z |
| Obs used |
118 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
12.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-09-30.0000000 |
| e |
0.41776560 |
| q (au) |
2.359299 |
| a (au) |
4.052147 |
| i (deg) |
15.244307 |
| Ω (om, deg) |
134.979116 |
| ω (w, deg) |
353.350939 |
| M (ma, deg) |
144.492270 |
等級
散乱 + 全体線形
$$
M_a = (16.414 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.414 |
| n |
2.000 |
| gf |
0.980 |
| gb |
-0.503 |
| k |
1.000 |
| δ90 |
9.995 |
| 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 |
22:27:02.65 |
-14:57:19.3 |
HIP 110723 |
15.17 |
| 2026-02-03 12:00 |
22:27:26.75 |
-14:55:18.9 |
HIP 110723 |
21.06 |
| 2026-02-04 00:00 |
22:27:50.88 |
-14:53:18.3 |
HIP 110723 |
27.09 |
| 2026-02-04 12:00 |
22:28:15.05 |
-14:51:17.5 |
HIP 110723 |
33.18 |
| 2026-02-05 00:00 |
22:28:39.26 |
-14:49:16.5 |
HIP 111086 |
27.61 |
| 2026-02-05 12:00 |
22:29:03.50 |
-14:47:15.3 |
HIP 111086 |
21.58 |
| 2026-02-06 00:00 |
22:29:27.77 |
-14:45:13.9 |
HIP 111086 |
15.67 |
| 2026-02-06 12:00 |
22:29:52.08 |
-14:43:12.4 |
HIP 111086 |
10.12 |
| 2026-02-07 00:00 |
22:30:16.42 |
-14:41:10.7 |
HIP 111086 |
6.04 |
| 2026-02-07 12:00 |
22:30:40.79 |
-14:39:08.8 |
HIP 111141 |
6.61 |
| 2026-02-08 00:00 |
22:31:05.20 |
-14:37:06.7 |
HIP 111141 |
3.55 |
| 2026-02-08 12:00 |
22:31:29.63 |
-14:35:04.5 |
HIP 111141 |
7.72 |
| 2026-02-09 00:00 |
22:31:54.10 |
-14:33:02.1 |
HIP 111141 |
13.60 |
| 2026-02-09 12:00 |
22:32:18.59 |
-14:30:59.5 |
HIP 111141 |
19.73 |
| 2026-02-10 00:00 |
22:32:43.12 |
-14:28:56.8 |
HIP 111141 |
25.93 |
| 2026-02-10 12:00 |
22:33:07.67 |
-14:26:54.0 |
HIP 111141 |
32.17 |
| 2026-02-11 00:00 |
22:33:32.25 |
-14:24:51.0 |
HIP 111141 |
38.44 |
| 2026-02-11 12:00 |
22:33:56.86 |
-14:22:47.9 |
HIP 111141 |
44.72 |
| 2026-02-12 00:00 |
22:34:21.49 |
-14:20:44.6 |
HIP 111646 |
42.19 |
| 2026-02-12 12:00 |
22:34:46.15 |
-14:18:41.2 |
HIP 111646 |
37.82 |
| 2026-02-13 00:00 |
22:35:10.83 |
-14:16:37.7 |
HIP 111646 |
34.06 |
| 2026-02-13 12:00 |
22:35:35.54 |
-14:14:34.1 |
HIP 111646 |
31.13 |
| 2026-02-14 00:00 |
22:36:00.27 |
-14:12:30.3 |
HIP 111646 |
29.30 |
| 2026-02-14 12:00 |
22:36:25.02 |
-14:10:26.5 |
HIP 111646 |
28.77 |
| 2026-02-15 00:00 |
22:36:49.80 |
-14:08:22.5 |
HIP 111777 |
24.61 |
| 2026-02-15 12:00 |
22:37:14.60 |
-14:06:18.4 |
HIP 111777 |
18.33 |
| 2026-02-16 00:00 |
22:37:39.42 |
-14:04:14.3 |
HIP 111777 |
12.13 |
| 2026-02-16 12:00 |
22:38:04.26 |
-14:02:10.0 |
HIP 111777 |
6.24 |
| 2026-02-17 00:00 |
22:38:29.11 |
-14:00:05.7 |
HIP 111777 |
3.45 |
| 2026-02-17 12:00 |
22:38:53.99 |
-13:58:01.3 |
HIP 111790 |
7.62 |
| 2026-02-18 00:00 |
22:39:18.88 |
-13:55:56.8 |
HIP 111790 |
13.43 |
| 2026-02-18 12:00 |
22:39:43.80 |
-13:53:52.3 |
HIP 111979 |
17.79 |
| 2026-02-19 00:00 |
22:40:08.72 |
-13:51:47.7 |
HIP 111979 |
11.57 |
| 2026-02-19 12:00 |
22:40:33.67 |
-13:49:43.0 |
HIP 111979 |
5.75 |
| 2026-02-20 00:00 |
22:40:58.63 |
-13:47:38.3 |
HIP 111979 |
3.78 |
| 2026-02-20 12:00 |
22:41:23.60 |
-13:45:33.5 |
HIP 111979 |
8.81 |
| 2026-02-21 00:00 |
22:41:48.58 |
-13:43:28.7 |
HIP 111979 |
14.94 |
| 2026-02-21 12:00 |
22:42:13.58 |
-13:41:23.9 |
HIP 111979 |
21.24 |
| 2026-02-22 00:00 |
22:42:38.60 |
-13:39:19.0 |
HIP 111979 |
27.60 |
| 2026-02-22 12:00 |
22:43:03.62 |
-13:37:14.1 |
HIP 111979 |
33.99 |
| 2026-02-23 00:00 |
22:43:28.65 |
-13:35:09.2 |
HIP 111979 |
40.39 |
| 2026-02-23 12:00 |
22:43:53.70 |
-13:33:04.3 |
HIP 112412 |
36.53 |
| 2026-02-24 00:00 |
22:44:18.75 |
-13:30:59.4 |
HIP 112412 |
32.46 |