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) |
| 2026-03-26 00:00 |
22:27:17.13 |
-43:23:14.3 |
HIP 110997 |
22.56 |
| 2026-03-26 12:00 |
22:27:34.41 |
-43:23:07.0 |
HIP 110997 |
19.62 |
| 2026-03-27 00:00 |
22:27:51.64 |
-43:23:00.6 |
HIP 110997 |
16.75 |
| 2026-03-27 12:00 |
22:28:08.81 |
-43:22:54.9 |
HIP 110997 |
14.00 |
| 2026-03-28 00:00 |
22:28:25.93 |
-43:22:50.2 |
HIP 110997 |
11.43 |
| 2026-03-28 12:00 |
22:28:43.00 |
-43:22:46.2 |
HIP 110997 |
9.20 |
| 2026-03-29 00:00 |
22:29:00.01 |
-43:22:43.1 |
HIP 110997 |
7.60 |
| 2026-03-29 12:00 |
22:29:16.96 |
-43:22:40.9 |
HIP 110997 |
7.05 |
| 2026-03-30 00:00 |
22:29:33.86 |
-43:22:39.5 |
HIP 110997 |
7.77 |
| 2026-03-30 12:00 |
22:29:50.71 |
-43:22:38.9 |
HIP 110997 |
9.46 |
| 2026-03-31 00:00 |
22:30:07.49 |
-43:22:39.2 |
HIP 110997 |
11.70 |
| 2026-03-31 12:00 |
22:30:24.22 |
-43:22:40.3 |
HIP 110997 |
14.23 |
| 2026-04-01 00:00 |
22:30:40.89 |
-43:22:42.3 |
HIP 110997 |
16.91 |
| 2026-04-01 12:00 |
22:30:57.50 |
-43:22:45.2 |
HIP 111219 |
14.99 |
| 2026-04-02 00:00 |
22:31:14.05 |
-43:22:48.9 |
HIP 111237 |
12.59 |
| 2026-04-02 12:00 |
22:31:30.54 |
-43:22:53.5 |
HIP 111237 |
10.30 |
| 2026-04-03 00:00 |
22:31:46.97 |
-43:22:58.9 |
HIP 111237 |
8.47 |
| 2026-04-03 12:00 |
22:32:03.33 |
-43:23:05.2 |
HIP 111237 |
7.45 |
| 2026-04-04 00:00 |
22:32:19.64 |
-43:23:12.4 |
HIP 111237 |
7.57 |
| 2026-04-04 12:00 |
22:32:35.88 |
-43:23:20.5 |
HIP 111237 |
8.76 |
| 2026-04-05 00:00 |
22:32:52.06 |
-43:23:29.4 |
HIP 111237 |
10.67 |
| 2026-04-05 12:00 |
22:33:08.18 |
-43:23:39.2 |
HIP 111389 |
9.75 |
| 2026-04-06 00:00 |
22:33:24.23 |
-43:23:49.8 |
HIP 111389 |
7.03 |
| 2026-04-06 12:00 |
22:33:40.22 |
-43:24:01.4 |
HIP 111389 |
4.58 |
| 2026-04-07 00:00 |
22:33:56.14 |
-43:24:13.8 |
HIP 111389 |
3.10 |
| 2026-04-07 12:00 |
22:34:12.00 |
-43:24:27.1 |
HIP 111389 |
3.88 |
| 2026-04-08 00:00 |
22:34:27.79 |
-43:24:41.3 |
HIP 111389 |
6.10 |
| 2026-04-08 12:00 |
22:34:43.51 |
-43:24:56.3 |
HIP 111389 |
8.71 |
| 2026-04-09 00:00 |
22:34:59.16 |
-43:25:12.3 |
HIP 111389 |
11.44 |
| 2026-04-09 12:00 |
22:35:14.75 |
-43:25:29.1 |
HIP 111389 |
14.21 |
| 2026-04-10 00:00 |
22:35:30.26 |
-43:25:46.9 |
HIP 111616 |
13.33 |
| 2026-04-10 12:00 |
22:35:45.70 |
-43:26:05.5 |
HIP 111616 |
10.52 |
| 2026-04-11 00:00 |
22:36:01.08 |
-43:26:25.0 |
HIP 111616 |
7.72 |
| 2026-04-11 12:00 |
22:36:16.38 |
-43:26:45.5 |
HIP 111616 |
4.96 |
| 2026-04-12 00:00 |
22:36:31.61 |
-43:27:06.8 |
HIP 111616 |
2.27 |
| 2026-04-12 12:00 |
22:36:46.77 |
-43:27:29.0 |
HIP 111616 |
1.11 |
| 2026-04-13 00:00 |
22:37:01.85 |
-43:27:52.2 |
HIP 111616 |
3.55 |
| 2026-04-13 12:00 |
22:37:16.86 |
-43:28:16.2 |
HIP 111616 |
6.25 |
| 2026-04-14 00:00 |
22:37:31.79 |
-43:28:41.2 |
HIP 111616 |
8.97 |
| 2026-04-14 12:00 |
22:37:46.65 |
-43:29:07.0 |
HIP 111616 |
11.68 |
| 2026-04-15 00:00 |
22:38:01.43 |
-43:29:33.8 |
HIP 111616 |
14.39 |
| 2026-04-15 12:00 |
22:38:16.13 |
-43:30:01.5 |
HIP 111616 |
17.09 |
| 2026-04-16 00:00 |
22:38:30.76 |
-43:30:30.1 |
HIP 111855 |
17.51 |