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) |
| 2026-03-26 00:00 |
22:29:46.01 |
-17:21:01.2 |
HIP 111122 |
27.62 |
| 2026-03-26 12:00 |
22:30:09.55 |
-17:19:16.3 |
HIP 111122 |
27.25 |
| 2026-03-27 00:00 |
22:30:33.03 |
-17:17:32.0 |
HIP 111122 |
28.11 |
| 2026-03-27 12:00 |
22:30:56.44 |
-17:15:48.2 |
HIP 111122 |
30.11 |
| 2026-03-28 00:00 |
22:31:19.79 |
-17:14:04.8 |
HIP 111312 |
29.07 |
| 2026-03-28 12:00 |
22:31:43.08 |
-17:12:22.0 |
HIP 111312 |
25.77 |
| 2026-03-29 00:00 |
22:32:06.30 |
-17:10:39.6 |
HIP 111312 |
23.47 |
| 2026-03-29 12:00 |
22:32:29.46 |
-17:08:57.8 |
HIP 111312 |
22.46 |
| 2026-03-30 00:00 |
22:32:52.55 |
-17:07:16.5 |
HIP 111312 |
22.91 |
| 2026-03-30 12:00 |
22:33:15.58 |
-17:05:35.7 |
HIP 111312 |
24.72 |
| 2026-03-31 00:00 |
22:33:38.53 |
-17:03:55.5 |
HIP 111312 |
27.61 |
| 2026-03-31 12:00 |
22:34:01.43 |
-17:02:15.8 |
HIP 111506 |
24.43 |
| 2026-04-01 00:00 |
22:34:24.25 |
-17:00:36.6 |
HIP 111506 |
21.18 |
| 2026-04-01 12:00 |
22:34:47.00 |
-16:58:57.9 |
HIP 111506 |
19.11 |
| 2026-04-02 00:00 |
22:35:09.69 |
-16:57:19.9 |
HIP 111506 |
18.61 |
| 2026-04-02 12:00 |
22:35:32.31 |
-16:55:42.3 |
HIP 111506 |
19.78 |
| 2026-04-03 00:00 |
22:35:54.85 |
-16:54:05.3 |
HIP 111506 |
22.34 |
| 2026-04-03 12:00 |
22:36:17.33 |
-16:52:28.9 |
HIP 111506 |
25.87 |
| 2026-04-04 00:00 |
22:36:39.73 |
-16:50:53.0 |
HIP 111563 |
28.74 |
| 2026-04-04 12:00 |
22:37:02.07 |
-16:49:17.8 |
HIP 111691 |
27.97 |
| 2026-04-05 00:00 |
22:37:24.33 |
-16:47:43.1 |
HIP 111780 |
24.95 |
| 2026-04-05 12:00 |
22:37:46.52 |
-16:46:08.9 |
HIP 111780 |
20.62 |
| 2026-04-06 00:00 |
22:38:08.63 |
-16:44:35.4 |
HIP 111780 |
17.02 |
| 2026-04-06 12:00 |
22:38:30.67 |
-16:43:02.5 |
HIP 111780 |
14.68 |
| 2026-04-07 00:00 |
22:38:52.63 |
-16:41:30.1 |
HIP 111780 |
14.20 |
| 2026-04-07 12:00 |
22:39:14.52 |
-16:39:58.4 |
HIP 111780 |
15.75 |
| 2026-04-08 00:00 |
22:39:36.33 |
-16:38:27.3 |
HIP 111953 |
16.92 |
| 2026-04-08 12:00 |
22:39:58.07 |
-16:36:56.8 |
HIP 111953 |
13.52 |
| 2026-04-09 00:00 |
22:40:19.73 |
-16:35:26.9 |
HIP 111953 |
11.75 |
| 2026-04-09 12:00 |
22:40:41.31 |
-16:33:57.7 |
HIP 111953 |
12.31 |
| 2026-04-10 00:00 |
22:41:02.81 |
-16:32:29.1 |
HIP 111953 |
14.90 |
| 2026-04-10 12:00 |
22:41:24.23 |
-16:31:01.1 |
HIP 111953 |
18.69 |
| 2026-04-11 00:00 |
22:41:45.57 |
-16:29:33.8 |
HIP 111953 |
23.08 |
| 2026-04-11 12:00 |
22:42:06.83 |
-16:28:07.1 |
HIP 111953 |
27.77 |
| 2026-04-12 00:00 |
22:42:28.01 |
-16:26:41.2 |
HIP 112209 |
24.03 |
| 2026-04-12 12:00 |
22:42:49.10 |
-16:25:15.8 |
HIP 112209 |
19.91 |
| 2026-04-13 00:00 |
22:43:10.11 |
-16:23:51.2 |
HIP 112209 |
16.48 |
| 2026-04-13 12:00 |
22:43:31.04 |
-16:22:27.2 |
HIP 112209 |
14.20 |
| 2026-04-14 00:00 |
22:43:51.88 |
-16:21:03.9 |
HIP 112209 |
13.64 |
| 2026-04-14 12:00 |
22:44:12.63 |
-16:19:41.3 |
HIP 112209 |
14.98 |
| 2026-04-15 00:00 |
22:44:33.30 |
-16:18:19.4 |
HIP 112209 |
17.77 |
| 2026-04-15 12:00 |
22:44:53.89 |
-16:16:58.3 |
HIP 112340 |
19.13 |
| 2026-04-16 00:00 |
22:45:14.38 |
-16:15:37.8 |
HIP 112367 |
19.35 |