メタデータ
| 項目 |
値 |
| Designation |
364P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-06-24T08:55:28.565760Z |
| Orbit solution date (soln_date, UTC) |
2024-06-21T13:42:24Z |
| Obs used |
1487 |
| NEO |
Yes |
| M1 |
17.500 |
| K1 |
7.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-02-19.0000000 |
| e |
0.72258546 |
| q (au) |
0.798538 |
| a (au) |
2.878499 |
| i (deg) |
12.150085 |
| Ω (om, deg) |
46.217585 |
| ω (w, deg) |
211.966136 |
| M (ma, deg) |
122.023441 |
等級
散乱 + 全体線形
$$
M_a = (17.631 + 4.427\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.631 |
| n |
4.427 |
| gf |
1.000 |
| gb |
-0.722 |
| k |
0.828 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2022-12-25 |
2023-05-14 |
+32.5086 |
+0.697 |
| 2023-05-14 |
2023-12-06 |
+0.5617 |
-0.236 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
04:46:27.00 |
+29:35:40.3 |
HIP 22250 |
19.73 |
| 2026-03-26 12:00 |
04:46:42.13 |
+29:35:39.8 |
HIP 22250 |
17.91 |
| 2026-03-27 00:00 |
04:46:57.42 |
+29:35:39.7 |
HIP 22250 |
16.56 |
| 2026-03-27 12:00 |
04:47:12.88 |
+29:35:40.0 |
HIP 22250 |
15.80 |
| 2026-03-28 00:00 |
04:47:28.50 |
+29:35:40.6 |
HIP 22250 |
15.74 |
| 2026-03-28 12:00 |
04:47:44.28 |
+29:35:41.6 |
HIP 22314 |
13.57 |
| 2026-03-29 00:00 |
04:48:00.23 |
+29:35:42.9 |
HIP 22314 |
11.74 |
| 2026-03-29 12:00 |
04:48:16.33 |
+29:35:44.6 |
HIP 22314 |
10.73 |
| 2026-03-30 00:00 |
04:48:32.59 |
+29:35:46.6 |
HIP 22402 |
9.55 |
| 2026-03-30 12:00 |
04:48:49.00 |
+29:35:49.0 |
HIP 22402 |
6.07 |
| 2026-03-31 00:00 |
04:49:05.57 |
+29:35:51.7 |
HIP 22402 |
2.76 |
| 2026-03-31 12:00 |
04:49:22.30 |
+29:35:54.8 |
HIP 22402 |
2.13 |
| 2026-04-01 00:00 |
04:49:39.17 |
+29:35:58.1 |
HIP 22402 |
5.31 |
| 2026-04-01 12:00 |
04:49:56.20 |
+29:36:01.8 |
HIP 22402 |
8.91 |
| 2026-04-02 00:00 |
04:50:13.38 |
+29:36:05.9 |
HIP 22402 |
12.61 |
| 2026-04-02 12:00 |
04:50:30.71 |
+29:36:10.2 |
HIP 22402 |
16.35 |
| 2026-04-03 00:00 |
04:50:48.19 |
+29:36:14.9 |
HIP 22571 |
16.14 |
| 2026-04-03 12:00 |
04:51:05.82 |
+29:36:19.8 |
HIP 22571 |
14.39 |
| 2026-04-04 00:00 |
04:51:23.59 |
+29:36:25.1 |
HIP 22571 |
13.52 |
| 2026-04-04 12:00 |
04:51:41.51 |
+29:36:30.7 |
HIP 22571 |
13.72 |
| 2026-04-05 00:00 |
04:51:59.57 |
+29:36:36.5 |
HIP 22571 |
14.98 |
| 2026-04-05 12:00 |
04:52:17.78 |
+29:36:42.7 |
HIP 22727 |
14.15 |
| 2026-04-06 00:00 |
04:52:36.13 |
+29:36:49.2 |
HIP 22727 |
10.29 |
| 2026-04-06 12:00 |
04:52:54.62 |
+29:36:55.9 |
HIP 22727 |
6.54 |
| 2026-04-07 00:00 |
04:53:13.25 |
+29:37:02.9 |
HIP 22727 |
3.46 |
| 2026-04-07 12:00 |
04:53:32.01 |
+29:37:10.2 |
HIP 22727 |
3.77 |
| 2026-04-08 00:00 |
04:53:50.92 |
+29:37:17.8 |
HIP 22727 |
7.08 |
| 2026-04-08 12:00 |
04:54:09.97 |
+29:37:25.6 |
HIP 22727 |
10.98 |
| 2026-04-09 00:00 |
04:54:29.15 |
+29:37:33.7 |
HIP 22727 |
15.04 |
| 2026-04-09 12:00 |
04:54:48.47 |
+29:37:42.1 |
HIP 22727 |
19.18 |
| 2026-04-10 00:00 |
04:55:07.92 |
+29:37:50.7 |
HIP 22778 |
23.11 |
| 2026-04-10 12:00 |
04:55:27.50 |
+29:37:59.6 |
HIP 22964 |
25.48 |
| 2026-04-11 00:00 |
04:55:47.22 |
+29:38:08.7 |
HIP 22964 |
23.38 |
| 2026-04-11 12:00 |
04:56:07.07 |
+29:38:18.1 |
HIP 23048 |
19.13 |
| 2026-04-12 00:00 |
04:56:27.05 |
+29:38:27.7 |
HIP 23048 |
14.86 |
| 2026-04-12 12:00 |
04:56:47.16 |
+29:38:37.5 |
HIP 23048 |
10.64 |
| 2026-04-13 00:00 |
04:57:07.39 |
+29:38:47.6 |
HIP 23048 |
6.57 |
| 2026-04-13 12:00 |
04:57:27.76 |
+29:38:57.9 |
HIP 23048 |
3.44 |
| 2026-04-14 00:00 |
04:57:48.25 |
+29:39:08.5 |
HIP 23048 |
4.45 |
| 2026-04-14 12:00 |
04:58:08.87 |
+29:39:19.2 |
HIP 23048 |
8.24 |
| 2026-04-15 00:00 |
04:58:29.61 |
+29:39:30.2 |
HIP 23143 |
11.69 |
| 2026-04-15 12:00 |
04:58:50.47 |
+29:39:41.4 |
HIP 23143 |
10.97 |
| 2026-04-16 00:00 |
04:59:11.46 |
+29:39:52.8 |
HIP 23143 |
12.05 |