メタデータ
| 項目 |
値 |
| Designation |
445P/Lemmon-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-08-19T02:37:51.418560Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:58Z |
| Obs used |
308 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
6.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
1998-11-22T06:48:55.008000Z |
| Discovery magnitude (MPC) |
21.10 V |
| Discovery observatory (MPC) |
691 · Steward Observatory, Kitt Peak-Spacewatch |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-12-24.0000000 |
| e |
0.41248906 |
| q (au) |
2.383958 |
| a (au) |
4.057726 |
| i (deg) |
1.088174 |
| Ω (om, deg) |
126.549865 |
| ω (w, deg) |
213.725650 |
| M (ma, deg) |
199.131293 |
等級
散乱 + 全体線形
$$
M_a = (14.751 + 2.907\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.751 |
| n |
2.907 |
| gf |
1.000 |
| gb |
-0.864 |
| k |
0.999 |
| 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) |
| 2026-06-01 00:00 |
09:47:05.64 |
+13:52:48.1 |
HIP 47994 |
15.17 |
| 2026-06-01 12:00 |
09:47:17.00 |
+13:51:49.0 |
HIP 47994 |
16.60 |
| 2026-06-02 00:00 |
09:47:28.48 |
+13:50:49.3 |
HIP 47994 |
18.41 |
| 2026-06-02 12:00 |
09:47:40.09 |
+13:49:48.9 |
HIP 48152 |
19.08 |
| 2026-06-03 00:00 |
09:47:51.82 |
+13:48:47.8 |
HIP 48152 |
16.07 |
| 2026-06-03 12:00 |
09:48:03.67 |
+13:47:46.0 |
HIP 48152 |
13.03 |
| 2026-06-04 00:00 |
09:48:15.63 |
+13:46:43.7 |
HIP 48152 |
9.97 |
| 2026-06-04 12:00 |
09:48:27.72 |
+13:45:40.6 |
HIP 48152 |
6.90 |
| 2026-06-05 00:00 |
09:48:39.92 |
+13:44:36.9 |
HIP 48152 |
3.88 |
| 2026-06-05 12:00 |
09:48:52.25 |
+13:43:32.6 |
HIP 48152 |
1.51 |
| 2026-06-06 00:00 |
09:49:04.68 |
+13:42:27.6 |
HIP 48152 |
3.15 |
| 2026-06-06 12:00 |
09:49:17.24 |
+13:41:22.0 |
HIP 48152 |
6.20 |
| 2026-06-07 00:00 |
09:49:29.91 |
+13:40:15.8 |
HIP 48152 |
9.41 |
| 2026-06-07 12:00 |
09:49:42.69 |
+13:39:08.9 |
HIP 48152 |
12.68 |
| 2026-06-08 00:00 |
09:49:55.59 |
+13:38:01.4 |
HIP 48152 |
16.00 |
| 2026-06-08 12:00 |
09:50:08.60 |
+13:36:53.3 |
HIP 48152 |
19.34 |
| 2026-06-09 00:00 |
09:50:21.72 |
+13:35:44.5 |
HIP 48152 |
22.72 |
| 2026-06-09 12:00 |
09:50:34.95 |
+13:34:35.1 |
HIP 48152 |
26.13 |
| 2026-06-10 00:00 |
09:50:48.29 |
+13:33:25.1 |
HIP 48152 |
29.57 |
| 2026-06-10 12:00 |
09:51:01.74 |
+13:32:14.5 |
HIP 48324 |
28.27 |
| 2026-06-11 00:00 |
09:51:15.31 |
+13:31:03.3 |
HIP 48324 |
27.27 |
| 2026-06-11 12:00 |
09:51:28.98 |
+13:29:51.4 |
HIP 48324 |
26.70 |
| 2026-06-12 00:00 |
09:51:42.75 |
+13:28:39.0 |
HIP 48324 |
26.59 |
| 2026-06-12 12:00 |
09:51:56.64 |
+13:27:25.9 |
HIP 48324 |
26.97 |
| 2026-06-13 00:00 |
09:52:10.63 |
+13:26:12.2 |
HIP 48324 |
27.81 |
| 2026-06-13 12:00 |
09:52:24.72 |
+13:24:57.9 |
HIP 48324 |
29.09 |
| 2026-06-14 00:00 |
09:52:38.92 |
+13:23:43.1 |
HIP 48324 |
30.76 |
| 2026-06-14 12:00 |
09:52:53.23 |
+13:22:27.6 |
HIP 48324 |
32.78 |
| 2026-06-15 00:00 |
09:53:07.63 |
+13:21:11.5 |
HIP 48579 |
33.37 |
| 2026-06-15 12:00 |
09:53:22.14 |
+13:19:54.9 |
HIP 48579 |
32.52 |
| 2026-06-16 00:00 |
09:53:36.75 |
+13:18:37.7 |
HIP 48579 |
32.08 |
| 2026-06-16 12:00 |
09:53:51.46 |
+13:17:19.8 |
HIP 48579 |
32.09 |
| 2026-06-17 00:00 |
09:54:06.26 |
+13:16:01.5 |
HIP 48579 |
32.55 |
| 2026-06-17 12:00 |
09:54:21.17 |
+13:14:42.5 |
HIP 48579 |
33.45 |
| 2026-06-18 00:00 |
09:54:36.17 |
+13:13:23.0 |
HIP 48579 |
34.77 |
| 2026-06-18 12:00 |
09:54:51.27 |
+13:12:02.9 |
HIP 48579 |
36.47 |
| 2026-06-19 00:00 |
09:55:06.46 |
+13:10:42.2 |
HIP 48579 |
38.51 |
| 2026-06-19 12:00 |
09:55:21.75 |
+13:09:21.0 |
HIP 48579 |
40.84 |
| 2026-06-20 00:00 |
09:55:37.14 |
+13:07:59.2 |
HIP 48825 |
41.02 |
| 2026-06-20 12:00 |
09:55:52.61 |
+13:06:36.9 |
HIP 48825 |
39.50 |
| 2026-06-21 00:00 |
09:56:08.18 |
+13:05:14.0 |
HIP 48825 |
38.35 |
| 2026-06-21 12:00 |
09:56:23.83 |
+13:03:50.6 |
HIP 48825 |
37.59 |
| 2026-06-22 00:00 |
09:56:39.58 |
+13:02:26.6 |
HIP 48825 |
37.25 |