365P/PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
365P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-02-10T18:09:33.384960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:38Z |
| Obs used |
403 |
| NEO |
- |
| M1 |
17.000 |
| K1 |
11.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-12-14.0000000 |
| e |
0.57334364 |
| q (au) |
1.359121 |
| a (au) |
3.185517 |
| i (deg) |
9.836431 |
| Ω (om, deg) |
87.442495 |
| ω (w, deg) |
66.397480 |
| M (ma, deg) |
349.814297 |
等級
散乱 + 全体線形
$$
M_a = (17.429 + 4.999\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.429 |
| n |
4.999 |
| gf |
1.000 |
| gb |
-0.552 |
| k |
0.800 |
| 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 |
21:46:12.86 |
-20:46:23.2 |
HIP 107427 |
48.18 |
| 2026-02-03 12:00 |
21:46:39.43 |
-20:44:14.9 |
HIP 107748 |
44.33 |
| 2026-02-04 00:00 |
21:47:06.00 |
-20:42:06.7 |
HIP 107748 |
37.76 |
| 2026-02-04 12:00 |
21:47:32.57 |
-20:39:58.4 |
HIP 107748 |
31.19 |
| 2026-02-05 00:00 |
21:47:59.15 |
-20:37:50.2 |
HIP 107748 |
24.62 |
| 2026-02-05 12:00 |
21:48:25.72 |
-20:35:42.0 |
HIP 107748 |
18.04 |
| 2026-02-06 00:00 |
21:48:52.30 |
-20:33:33.7 |
HIP 107748 |
11.47 |
| 2026-02-06 12:00 |
21:49:18.88 |
-20:31:25.6 |
HIP 107748 |
4.92 |
| 2026-02-07 00:00 |
21:49:45.46 |
-20:29:17.4 |
HIP 107748 |
1.83 |
| 2026-02-07 12:00 |
21:50:12.03 |
-20:27:09.2 |
HIP 107748 |
8.31 |
| 2026-02-08 00:00 |
21:50:38.61 |
-20:25:01.1 |
HIP 107839 |
7.96 |
| 2026-02-08 12:00 |
21:51:05.18 |
-20:22:53.0 |
HIP 107839 |
10.14 |
| 2026-02-09 00:00 |
21:51:31.74 |
-20:20:45.0 |
HIP 107845 |
12.54 |
| 2026-02-09 12:00 |
21:51:58.31 |
-20:18:37.0 |
HIP 107845 |
16.24 |
| 2026-02-10 00:00 |
21:52:24.87 |
-20:16:29.1 |
HIP 107845 |
21.38 |
| 2026-02-10 12:00 |
21:52:51.42 |
-20:14:21.1 |
HIP 108072 |
18.98 |
| 2026-02-11 00:00 |
21:53:17.97 |
-20:12:13.3 |
HIP 108072 |
13.54 |
| 2026-02-11 12:00 |
21:53:44.51 |
-20:10:05.5 |
HIP 108072 |
9.66 |
| 2026-02-12 00:00 |
21:54:11.04 |
-20:07:57.8 |
HIP 108072 |
9.48 |
| 2026-02-12 12:00 |
21:54:37.57 |
-20:05:50.1 |
HIP 108072 |
13.16 |
| 2026-02-13 00:00 |
21:55:04.09 |
-20:03:42.6 |
HIP 108072 |
18.52 |
| 2026-02-13 12:00 |
21:55:30.59 |
-20:01:35.1 |
HIP 108203 |
23.42 |
| 2026-02-14 00:00 |
21:55:57.09 |
-19:59:27.6 |
HIP 108203 |
22.99 |
| 2026-02-14 12:00 |
21:56:23.58 |
-19:57:20.3 |
HIP 108203 |
24.39 |
| 2026-02-15 00:00 |
21:56:50.05 |
-19:55:13.1 |
HIP 108203 |
27.36 |
| 2026-02-15 12:00 |
21:57:16.52 |
-19:53:05.9 |
HIP 108502 |
27.66 |
| 2026-02-16 00:00 |
21:57:42.97 |
-19:50:58.9 |
HIP 108502 |
21.50 |
| 2026-02-16 12:00 |
21:58:09.40 |
-19:48:51.9 |
HIP 108502 |
15.68 |
| 2026-02-17 00:00 |
21:58:35.83 |
-19:46:45.1 |
HIP 108502 |
10.76 |
| 2026-02-17 12:00 |
21:59:02.23 |
-19:44:38.4 |
HIP 108502 |
8.49 |
| 2026-02-18 00:00 |
21:59:28.62 |
-19:42:31.8 |
HIP 108502 |
10.71 |
| 2026-02-18 12:00 |
21:59:55.00 |
-19:40:25.4 |
HIP 108502 |
15.59 |
| 2026-02-19 00:00 |
22:00:21.35 |
-19:38:19.1 |
HIP 108502 |
21.39 |
| 2026-02-19 12:00 |
22:00:47.69 |
-19:36:12.9 |
HIP 108708 |
18.57 |
| 2026-02-20 00:00 |
22:01:14.01 |
-19:34:06.8 |
HIP 108708 |
15.35 |
| 2026-02-20 12:00 |
22:01:40.31 |
-19:32:00.9 |
HIP 108708 |
14.57 |
| 2026-02-21 00:00 |
22:02:06.59 |
-19:29:55.2 |
HIP 108708 |
16.57 |
| 2026-02-21 12:00 |
22:02:32.85 |
-19:27:49.6 |
HIP 108708 |
20.55 |
| 2026-02-22 00:00 |
22:02:59.09 |
-19:25:44.2 |
HIP 108708 |
25.60 |
| 2026-02-22 12:00 |
22:03:25.30 |
-19:23:38.9 |
HIP 108999 |
28.06 |
| 2026-02-23 00:00 |
22:03:51.49 |
-19:21:33.8 |
HIP 108999 |
22.27 |
| 2026-02-23 12:00 |
22:04:17.66 |
-19:19:28.9 |
HIP 108999 |
17.04 |
| 2026-02-24 00:00 |
22:04:43.81 |
-19:17:24.2 |
HIP 108999 |
13.03 |