364P/PANSTARRS
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) |
| 2026-02-03 00:00 |
04:38:52.98 |
+30:16:06.5 |
HIP 21566 |
16.82 |
| 2026-02-03 12:00 |
04:38:45.18 |
+30:15:20.3 |
HIP 21566 |
15.81 |
| 2026-02-04 00:00 |
04:38:37.64 |
+30:14:34.4 |
HIP 21566 |
15.01 |
| 2026-02-04 12:00 |
04:38:30.36 |
+30:13:48.8 |
HIP 21566 |
14.42 |
| 2026-02-05 00:00 |
04:38:23.35 |
+30:13:03.5 |
HIP 21566 |
14.05 |
| 2026-02-05 12:00 |
04:38:16.60 |
+30:12:18.6 |
HIP 21566 |
13.90 |
| 2026-02-06 00:00 |
04:38:10.12 |
+30:11:34.0 |
HIP 21566 |
13.96 |
| 2026-02-06 12:00 |
04:38:03.90 |
+30:10:49.8 |
HIP 21566 |
14.21 |
| 2026-02-07 00:00 |
04:37:57.95 |
+30:10:06.0 |
HIP 21566 |
14.62 |
| 2026-02-07 12:00 |
04:37:52.26 |
+30:09:22.5 |
HIP 21566 |
15.16 |
| 2026-02-08 00:00 |
04:37:46.84 |
+30:08:39.4 |
HIP 21566 |
15.81 |
| 2026-02-08 12:00 |
04:37:41.67 |
+30:07:56.7 |
HIP 21566 |
16.53 |
| 2026-02-09 00:00 |
04:37:36.78 |
+30:07:14.4 |
HIP 21566 |
17.32 |
| 2026-02-09 12:00 |
04:37:32.14 |
+30:06:32.4 |
HIP 21516 |
17.88 |
| 2026-02-10 00:00 |
04:37:27.77 |
+30:05:50.9 |
HIP 21516 |
18.39 |
| 2026-02-10 12:00 |
04:37:23.65 |
+30:05:09.8 |
HIP 21516 |
18.95 |
| 2026-02-11 00:00 |
04:37:19.80 |
+30:04:29.1 |
HIP 21516 |
19.56 |
| 2026-02-11 12:00 |
04:37:16.21 |
+30:03:48.8 |
HIP 21516 |
20.20 |
| 2026-02-12 00:00 |
04:37:12.88 |
+30:03:08.9 |
HIP 21516 |
20.86 |
| 2026-02-12 12:00 |
04:37:09.82 |
+30:02:29.5 |
HIP 21516 |
21.54 |
| 2026-02-13 00:00 |
04:37:07.01 |
+30:01:50.5 |
HIP 21516 |
22.23 |
| 2026-02-13 12:00 |
04:37:04.46 |
+30:01:11.9 |
HIP 21516 |
22.91 |
| 2026-02-14 00:00 |
04:37:02.17 |
+30:00:33.8 |
HIP 21516 |
23.59 |
| 2026-02-14 12:00 |
04:37:00.13 |
+29:59:56.1 |
HIP 21516 |
24.27 |
| 2026-02-15 00:00 |
04:36:58.36 |
+29:59:18.9 |
HIP 21373 |
24.37 |
| 2026-02-15 12:00 |
04:36:56.84 |
+29:58:42.1 |
HIP 21373 |
23.86 |
| 2026-02-16 00:00 |
04:36:55.57 |
+29:58:05.9 |
HIP 21373 |
23.42 |
| 2026-02-16 12:00 |
04:36:54.57 |
+29:57:30.0 |
HIP 21373 |
23.04 |
| 2026-02-17 00:00 |
04:36:53.81 |
+29:56:54.7 |
HIP 21373 |
22.73 |
| 2026-02-17 12:00 |
04:36:53.31 |
+29:56:19.8 |
HIP 21373 |
22.49 |
| 2026-02-18 00:00 |
04:36:53.06 |
+29:55:45.4 |
HIP 21373 |
22.32 |
| 2026-02-18 12:00 |
04:36:53.07 |
+29:55:11.4 |
HIP 21373 |
22.22 |
| 2026-02-19 00:00 |
04:36:53.33 |
+29:54:38.0 |
HIP 21373 |
22.18 |
| 2026-02-19 12:00 |
04:36:53.83 |
+29:54:05.0 |
HIP 21373 |
22.21 |
| 2026-02-20 00:00 |
04:36:54.59 |
+29:53:32.5 |
HIP 21373 |
22.32 |
| 2026-02-20 12:00 |
04:36:55.59 |
+29:53:00.5 |
HIP 21373 |
22.49 |
| 2026-02-21 00:00 |
04:36:56.84 |
+29:52:29.0 |
HIP 21373 |
22.73 |
| 2026-02-21 12:00 |
04:36:58.34 |
+29:51:58.0 |
HIP 21373 |
23.03 |
| 2026-02-22 00:00 |
04:37:00.08 |
+29:51:27.5 |
HIP 21373 |
23.40 |
| 2026-02-22 12:00 |
04:37:02.07 |
+29:50:57.5 |
HIP 21373 |
23.83 |
| 2026-02-23 00:00 |
04:37:04.30 |
+29:50:28.0 |
HIP 21373 |
24.33 |
| 2026-02-23 12:00 |
04:37:06.77 |
+29:49:59.0 |
HIP 21373 |
24.89 |
| 2026-02-24 00:00 |
04:37:09.48 |
+29:49:30.4 |
HIP 21373 |
25.50 |