メタデータ
| 項目 |
値 |
| Designation |
P/2019 LM4 (Palomar) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-06-18T05:44:43.520640Z |
| Orbit solution date (soln_date, UTC) |
2024-12-26T20:12:37Z |
| Obs used |
248 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-04-23.0000000 |
| e |
0.58520723 |
| q (au) |
2.371614 |
| a (au) |
5.717588 |
| i (deg) |
36.394763 |
| Ω (om, deg) |
72.858371 |
| ω (w, deg) |
68.371061 |
| M (ma, deg) |
22.331143 |
等級
散乱 + 全体線形
$$
M_a = (7.257 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.257 |
| n |
6.000 |
| gf |
0.933 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
5.833 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
22:46:29.14 |
-49:21:23.7 |
HIP 112390 |
8.19 |
| 2026-07-29 12:00 |
22:46:17.00 |
-49:23:19.1 |
HIP 112390 |
8.12 |
| 2026-07-30 00:00 |
22:46:04.74 |
-49:25:13.7 |
HIP 112390 |
8.93 |
| 2026-07-30 12:00 |
22:45:52.37 |
-49:27:07.6 |
HIP 112390 |
10.42 |
| 2026-07-31 00:00 |
22:45:39.89 |
-49:29:00.8 |
HIP 112390 |
12.35 |
| 2026-07-31 12:00 |
22:45:27.29 |
-49:30:53.1 |
HIP 112432 |
14.21 |
| 2026-08-01 00:00 |
22:45:14.58 |
-49:32:44.7 |
HIP 112432 |
14.57 |
| 2026-08-01 12:00 |
22:45:01.77 |
-49:34:35.5 |
HIP 112432 |
15.44 |
| 2026-08-02 00:00 |
22:44:48.84 |
-49:36:25.5 |
HIP 112432 |
16.75 |
| 2026-08-02 12:00 |
22:44:35.81 |
-49:38:14.6 |
HIP 112432 |
18.41 |
| 2026-08-03 00:00 |
22:44:22.67 |
-49:40:03.0 |
HIP 112432 |
20.34 |
| 2026-08-03 12:00 |
22:44:09.43 |
-49:41:50.4 |
HIP 112432 |
22.46 |
| 2026-08-04 00:00 |
22:43:56.08 |
-49:43:37.0 |
HIP 112432 |
24.72 |
| 2026-08-04 12:00 |
22:43:42.63 |
-49:45:22.8 |
HIP 112432 |
27.10 |
| 2026-08-05 00:00 |
22:43:29.08 |
-49:47:07.6 |
HIP 112432 |
29.56 |
| 2026-08-05 12:00 |
22:43:15.44 |
-49:48:51.5 |
HIP 112432 |
32.09 |
| 2026-08-06 00:00 |
22:43:01.69 |
-49:50:34.5 |
HIP 111909 |
31.81 |
| 2026-08-06 12:00 |
22:42:47.85 |
-49:52:16.6 |
HIP 111909 |
30.71 |
| 2026-08-07 00:00 |
22:42:33.92 |
-49:53:57.8 |
HIP 111909 |
29.82 |
| 2026-08-07 12:00 |
22:42:19.89 |
-49:55:37.9 |
HIP 111909 |
29.15 |
| 2026-08-08 00:00 |
22:42:05.78 |
-49:57:17.1 |
HIP 111909 |
28.72 |
| 2026-08-08 12:00 |
22:41:51.57 |
-49:58:55.4 |
HIP 111816 |
28.29 |
| 2026-08-09 00:00 |
22:41:37.28 |
-50:00:32.6 |
HIP 111816 |
25.92 |
| 2026-08-09 12:00 |
22:41:22.89 |
-50:02:08.8 |
HIP 111816 |
23.63 |
| 2026-08-10 00:00 |
22:41:08.43 |
-50:03:44.0 |
HIP 111816 |
21.46 |
| 2026-08-10 12:00 |
22:40:53.88 |
-50:05:18.2 |
HIP 111816 |
19.43 |
| 2026-08-11 00:00 |
22:40:39.26 |
-50:06:51.3 |
HIP 111816 |
17.61 |
| 2026-08-11 12:00 |
22:40:24.55 |
-50:08:23.3 |
HIP 111816 |
16.06 |
| 2026-08-12 00:00 |
22:40:09.77 |
-50:09:54.3 |
HIP 111816 |
14.87 |
| 2026-08-12 12:00 |
22:39:54.91 |
-50:11:24.2 |
HIP 111816 |
14.13 |
| 2026-08-13 00:00 |
22:39:39.98 |
-50:12:53.0 |
HIP 111816 |
13.91 |
| 2026-08-13 12:00 |
22:39:24.98 |
-50:14:20.7 |
HIP 111816 |
14.23 |
| 2026-08-14 00:00 |
22:39:09.91 |
-50:15:47.2 |
HIP 111816 |
15.05 |
| 2026-08-14 12:00 |
22:38:54.78 |
-50:17:12.6 |
HIP 111816 |
16.31 |
| 2026-08-15 00:00 |
22:38:39.58 |
-50:18:36.9 |
HIP 111714 |
16.91 |
| 2026-08-15 12:00 |
22:38:24.31 |
-50:20:00.1 |
HIP 111714 |
17.11 |
| 2026-08-16 00:00 |
22:38:08.99 |
-50:21:22.0 |
HIP 111714 |
17.74 |
| 2026-08-16 12:00 |
22:37:53.61 |
-50:22:42.8 |
HIP 111714 |
18.75 |
| 2026-08-17 00:00 |
22:37:38.17 |
-50:24:02.4 |
HIP 111714 |
20.09 |
| 2026-08-17 12:00 |
22:37:22.68 |
-50:25:20.8 |
HIP 111511 |
20.25 |
| 2026-08-18 00:00 |
22:37:07.13 |
-50:26:38.1 |
HIP 111511 |
17.46 |
| 2026-08-18 12:00 |
22:36:51.53 |
-50:27:54.1 |
HIP 111511 |
14.68 |
| 2026-08-19 00:00 |
22:36:35.89 |
-50:29:08.9 |
HIP 111511 |
11.90 |