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) |
| 2026-05-12 00:00 |
23:00:40.52 |
-15:24:37.2 |
HIP 113685 |
12.49 |
| 2026-05-12 12:00 |
23:00:55.31 |
-15:24:02.6 |
HIP 113685 |
8.88 |
| 2026-05-13 00:00 |
23:01:09.96 |
-15:23:28.9 |
HIP 113685 |
5.30 |
| 2026-05-13 12:00 |
23:01:24.49 |
-15:22:56.4 |
HIP 113685 |
1.77 |
| 2026-05-14 00:00 |
23:01:38.88 |
-15:22:24.8 |
HIP 113685 |
1.77 |
| 2026-05-14 12:00 |
23:01:53.15 |
-15:21:54.3 |
HIP 113685 |
5.24 |
| 2026-05-15 00:00 |
23:02:07.28 |
-15:21:24.8 |
HIP 113685 |
8.68 |
| 2026-05-15 12:00 |
23:02:21.28 |
-15:20:56.4 |
HIP 113685 |
12.08 |
| 2026-05-16 00:00 |
23:02:35.14 |
-15:20:29.1 |
HIP 113827 |
14.97 |
| 2026-05-16 12:00 |
23:02:48.87 |
-15:20:02.8 |
HIP 113827 |
13.38 |
| 2026-05-17 00:00 |
23:03:02.46 |
-15:19:37.6 |
HIP 113827 |
12.53 |
| 2026-05-17 12:00 |
23:03:15.91 |
-15:19:13.4 |
HIP 113827 |
12.52 |
| 2026-05-18 00:00 |
23:03:29.23 |
-15:18:50.3 |
HIP 113827 |
13.35 |
| 2026-05-18 12:00 |
23:03:42.41 |
-15:18:28.4 |
HIP 113827 |
14.84 |
| 2026-05-19 00:00 |
23:03:55.44 |
-15:18:07.5 |
HIP 113827 |
16.80 |
| 2026-05-19 12:00 |
23:04:08.34 |
-15:17:47.7 |
HIP 113827 |
19.07 |
| 2026-05-20 00:00 |
23:04:21.10 |
-15:17:29.0 |
HIP 114016 |
17.40 |
| 2026-05-20 12:00 |
23:04:33.71 |
-15:17:11.3 |
HIP 114016 |
14.98 |
| 2026-05-21 00:00 |
23:04:46.18 |
-15:16:54.8 |
HIP 114016 |
12.84 |
| 2026-05-21 12:00 |
23:04:58.51 |
-15:16:39.5 |
HIP 114016 |
11.12 |
| 2026-05-22 00:00 |
23:05:10.69 |
-15:16:25.2 |
HIP 114016 |
10.01 |
| 2026-05-22 12:00 |
23:05:22.73 |
-15:16:12.0 |
HIP 114016 |
9.68 |
| 2026-05-23 00:00 |
23:05:34.62 |
-15:16:00.0 |
HIP 114016 |
10.18 |
| 2026-05-23 12:00 |
23:05:46.37 |
-15:15:49.0 |
HIP 114016 |
11.37 |
| 2026-05-24 00:00 |
23:05:57.96 |
-15:15:39.3 |
HIP 114055 |
11.57 |
| 2026-05-24 12:00 |
23:06:09.41 |
-15:15:30.6 |
HIP 114055 |
12.31 |
| 2026-05-25 00:00 |
23:06:20.72 |
-15:15:23.1 |
HIP 114055 |
13.55 |
| 2026-05-25 12:00 |
23:06:31.87 |
-15:15:16.7 |
HIP 114055 |
15.15 |
| 2026-05-26 00:00 |
23:06:42.87 |
-15:15:11.4 |
HIP 114055 |
16.98 |
| 2026-05-26 12:00 |
23:06:53.72 |
-15:15:07.3 |
HIP 114055 |
18.97 |
| 2026-05-27 00:00 |
23:07:04.42 |
-15:15:04.4 |
HIP 114252 |
20.45 |
| 2026-05-27 12:00 |
23:07:14.97 |
-15:15:02.6 |
HIP 114252 |
18.25 |
| 2026-05-28 00:00 |
23:07:25.36 |
-15:15:01.9 |
HIP 114252 |
16.18 |
| 2026-05-28 12:00 |
23:07:35.60 |
-15:15:02.4 |
HIP 114252 |
14.26 |
| 2026-05-29 00:00 |
23:07:45.68 |
-15:15:04.1 |
HIP 114252 |
12.54 |
| 2026-05-29 12:00 |
23:07:55.61 |
-15:15:07.0 |
HIP 114252 |
11.09 |
| 2026-05-30 00:00 |
23:08:05.39 |
-15:15:11.0 |
HIP 114252 |
10.01 |
| 2026-05-30 12:00 |
23:08:15.00 |
-15:15:16.2 |
HIP 114252 |
9.39 |
| 2026-05-31 00:00 |
23:08:24.46 |
-15:15:22.5 |
HIP 114252 |
9.30 |
| 2026-05-31 12:00 |
23:08:33.76 |
-15:15:30.1 |
HIP 114252 |
9.72 |
| 2026-06-01 00:00 |
23:08:42.90 |
-15:15:38.8 |
HIP 114252 |
10.58 |
| 2026-06-01 12:00 |
23:08:51.88 |
-15:15:48.8 |
HIP 114252 |
11.75 |
| 2026-06-02 00:00 |
23:09:00.69 |
-15:15:59.9 |
HIP 114252 |
13.14 |