メタデータ
| 項目 |
値 |
| Designation |
P/2019 X1 (Pruyne) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-07-22T09:51:42.183360Z |
| Orbit solution date (soln_date, UTC) |
2021-05-31T22:43:04Z |
| Obs used |
137 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-12-02T08:46:47.712000Z |
| Discovery magnitude (MPC) |
19.40 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-05-31.0000000 |
| e |
0.30260697 |
| q (au) |
4.305513 |
| a (au) |
6.173725 |
| i (deg) |
10.246545 |
| Ω (om, deg) |
43.727710 |
| ω (w, deg) |
36.929270 |
| M (ma, deg) |
356.632521 |
等級
散乱 + 全体線形
$$
M_a = (16.134 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.134 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.701 |
| k |
0.800 |
| δ90 |
9.979 |
| 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) |
| 2026-06-01 00:00 |
16:26:50.96 |
-26:54:55.5 |
HIP 80565 |
13.47 |
| 2026-06-01 12:00 |
16:26:37.83 |
-26:54:39.2 |
HIP 80565 |
14.33 |
| 2026-06-02 00:00 |
16:26:24.70 |
-26:54:22.8 |
HIP 80565 |
15.71 |
| 2026-06-02 12:00 |
16:26:11.58 |
-26:54:06.0 |
HIP 80565 |
17.47 |
| 2026-06-03 00:00 |
16:25:58.48 |
-26:53:49.0 |
HIP 80400 |
18.21 |
| 2026-06-03 12:00 |
16:25:45.38 |
-26:53:31.8 |
HIP 80400 |
15.35 |
| 2026-06-04 00:00 |
16:25:32.30 |
-26:53:14.4 |
HIP 80400 |
12.52 |
| 2026-06-04 12:00 |
16:25:19.24 |
-26:52:56.7 |
HIP 80400 |
9.75 |
| 2026-06-05 00:00 |
16:25:06.20 |
-26:52:38.7 |
HIP 80400 |
7.12 |
| 2026-06-05 12:00 |
16:24:53.18 |
-26:52:20.6 |
HIP 80400 |
4.83 |
| 2026-06-06 00:00 |
16:24:40.17 |
-26:52:02.2 |
HIP 80400 |
3.61 |
| 2026-06-06 12:00 |
16:24:27.20 |
-26:51:43.6 |
HIP 80400 |
4.43 |
| 2026-06-07 00:00 |
16:24:14.24 |
-26:51:24.8 |
HIP 80400 |
6.57 |
| 2026-06-07 12:00 |
16:24:01.32 |
-26:51:05.7 |
HIP 80400 |
9.14 |
| 2026-06-08 00:00 |
16:23:48.42 |
-26:50:46.5 |
HIP 80400 |
11.85 |
| 2026-06-08 12:00 |
16:23:35.55 |
-26:50:27.1 |
HIP 80400 |
14.63 |
| 2026-06-09 00:00 |
16:23:22.71 |
-26:50:07.4 |
HIP 80400 |
17.43 |
| 2026-06-09 12:00 |
16:23:09.91 |
-26:49:47.6 |
HIP 80400 |
20.25 |
| 2026-06-10 00:00 |
16:22:57.14 |
-26:49:27.5 |
HIP 80400 |
23.08 |
| 2026-06-10 12:00 |
16:22:44.41 |
-26:49:07.3 |
HIP 80400 |
25.91 |
| 2026-06-11 00:00 |
16:22:31.71 |
-26:48:46.9 |
HIP 80400 |
28.73 |
| 2026-06-11 12:00 |
16:22:19.06 |
-26:48:26.3 |
HIP 80123 |
28.81 |
| 2026-06-12 00:00 |
16:22:06.45 |
-26:48:05.6 |
HIP 80123 |
27.93 |
| 2026-06-12 12:00 |
16:21:53.88 |
-26:47:44.7 |
HIP 80123 |
27.31 |
| 2026-06-13 00:00 |
16:21:41.35 |
-26:47:23.6 |
HIP 80123 |
26.99 |
| 2026-06-13 12:00 |
16:21:28.88 |
-26:47:02.4 |
HIP 79987 |
25.37 |
| 2026-06-14 00:00 |
16:21:16.45 |
-26:46:41.0 |
HIP 79987 |
22.76 |
| 2026-06-14 12:00 |
16:21:04.07 |
-26:46:19.4 |
HIP 79987 |
20.21 |
| 2026-06-15 00:00 |
16:20:51.75 |
-26:45:57.7 |
HIP 79987 |
17.74 |
| 2026-06-15 12:00 |
16:20:39.48 |
-26:45:35.9 |
HIP 79987 |
15.39 |
| 2026-06-16 00:00 |
16:20:27.26 |
-26:45:14.0 |
HIP 79987 |
13.21 |
| 2026-06-16 12:00 |
16:20:15.10 |
-26:44:51.9 |
HIP 79987 |
11.30 |
| 2026-06-17 00:00 |
16:20:03.00 |
-26:44:29.7 |
HIP 79987 |
9.79 |
| 2026-06-17 12:00 |
16:19:50.96 |
-26:44:07.4 |
HIP 79987 |
8.89 |
| 2026-06-18 00:00 |
16:19:38.99 |
-26:43:44.9 |
HIP 79987 |
8.77 |
| 2026-06-18 12:00 |
16:19:27.07 |
-26:43:22.4 |
HIP 79987 |
9.45 |
| 2026-06-19 00:00 |
16:19:15.22 |
-26:42:59.8 |
HIP 79987 |
10.78 |
| 2026-06-19 12:00 |
16:19:03.44 |
-26:42:37.0 |
HIP 79987 |
12.53 |
| 2026-06-20 00:00 |
16:18:51.73 |
-26:42:14.2 |
HIP 79987 |
14.55 |
| 2026-06-20 12:00 |
16:18:40.08 |
-26:41:51.3 |
HIP 79987 |
16.73 |
| 2026-06-21 00:00 |
16:18:28.51 |
-26:41:28.3 |
HIP 79987 |
19.01 |
| 2026-06-21 12:00 |
16:18:17.01 |
-26:41:05.2 |
HIP 79987 |
21.36 |
| 2026-06-22 00:00 |
16:18:05.58 |
-26:40:42.1 |
HIP 79815 |
22.45 |