メタデータ
| 項目 |
値 |
| Designation |
P/2005 L1 (McNaught) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-12-13T02:11:41.599680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:50Z |
| Obs used |
257 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-07-03.0000000 |
| e |
0.20923826 |
| q (au) |
3.142854 |
| a (au) |
3.974464 |
| i (deg) |
7.736935 |
| Ω (om, deg) |
138.329197 |
| ω (w, deg) |
149.558655 |
| M (ma, deg) |
339.713017 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-09-20 00:00 |
09:25:07.25 |
+16:37:10.1 |
HIP 46232 |
6.39 |
| 2026-09-20 12:00 |
09:25:31.86 |
+16:35:43.3 |
HIP 46232 |
0.60 |
| 2026-09-21 00:00 |
09:25:56.41 |
+16:34:16.6 |
HIP 46232 |
5.78 |
| 2026-09-21 12:00 |
09:26:20.88 |
+16:32:50.2 |
HIP 46311 |
9.94 |
| 2026-09-22 00:00 |
09:26:45.28 |
+16:31:24.0 |
HIP 46311 |
10.65 |
| 2026-09-22 12:00 |
09:27:09.61 |
+16:29:58.0 |
HIP 46311 |
14.15 |
| 2026-09-23 00:00 |
09:27:33.87 |
+16:28:32.3 |
HIP 46311 |
18.93 |
| 2026-09-23 12:00 |
09:27:58.05 |
+16:27:06.9 |
HIP 46311 |
24.24 |
| 2026-09-24 00:00 |
09:28:22.16 |
+16:25:41.7 |
HIP 46561 |
19.91 |
| 2026-09-24 12:00 |
09:28:46.20 |
+16:24:16.8 |
HIP 46561 |
13.98 |
| 2026-09-25 00:00 |
09:29:10.16 |
+16:22:52.1 |
HIP 46561 |
8.06 |
| 2026-09-25 12:00 |
09:29:34.05 |
+16:21:27.7 |
HIP 46561 |
2.17 |
| 2026-09-26 00:00 |
09:29:57.86 |
+16:20:03.6 |
HIP 46561 |
3.73 |
| 2026-09-26 12:00 |
09:30:21.60 |
+16:18:39.8 |
HIP 46561 |
9.59 |
| 2026-09-27 00:00 |
09:30:45.25 |
+16:17:16.3 |
HIP 46561 |
15.43 |
| 2026-09-27 12:00 |
09:31:08.83 |
+16:15:53.1 |
HIP 46561 |
21.26 |
| 2026-09-28 00:00 |
09:31:32.33 |
+16:14:30.2 |
HIP 46866 |
25.85 |
| 2026-09-28 12:00 |
09:31:55.75 |
+16:13:07.6 |
HIP 46866 |
22.55 |
| 2026-09-29 00:00 |
09:32:19.09 |
+16:11:45.3 |
HIP 46866 |
20.39 |
| 2026-09-29 12:00 |
09:32:42.35 |
+16:10:23.3 |
HIP 46866 |
19.73 |
| 2026-09-30 00:00 |
09:33:05.53 |
+16:09:01.7 |
HIP 46866 |
20.71 |
| 2026-09-30 12:00 |
09:33:28.63 |
+16:07:40.4 |
HIP 46866 |
23.09 |
| 2026-10-01 00:00 |
09:33:51.64 |
+16:06:19.4 |
HIP 46999 |
24.06 |
| 2026-10-01 12:00 |
09:34:14.57 |
+16:04:58.8 |
HIP 46999 |
22.95 |
| 2026-10-02 00:00 |
09:34:37.41 |
+16:03:38.6 |
HIP 46999 |
23.21 |
| 2026-10-02 12:00 |
09:35:00.17 |
+16:02:18.7 |
HIP 46999 |
24.77 |
| 2026-10-03 00:00 |
09:35:22.84 |
+16:00:59.1 |
HIP 46999 |
27.41 |
| 2026-10-03 12:00 |
09:35:45.43 |
+15:59:40.0 |
HIP 47196 |
24.13 |
| 2026-10-04 00:00 |
09:36:07.93 |
+15:58:21.2 |
HIP 47196 |
20.89 |
| 2026-10-04 12:00 |
09:36:30.34 |
+15:57:02.9 |
HIP 47196 |
18.77 |
| 2026-10-05 00:00 |
09:36:52.66 |
+15:55:44.9 |
HIP 47196 |
18.16 |
| 2026-10-05 12:00 |
09:37:14.88 |
+15:54:27.3 |
HIP 47196 |
19.18 |
| 2026-10-06 00:00 |
09:37:37.02 |
+15:53:10.2 |
HIP 47196 |
21.58 |
| 2026-10-06 12:00 |
09:37:59.07 |
+15:51:53.4 |
HIP 47233 |
24.86 |
| 2026-10-07 00:00 |
09:38:21.02 |
+15:50:37.1 |
HIP 47233 |
25.24 |
| 2026-10-07 12:00 |
09:38:42.87 |
+15:49:21.3 |
HIP 47233 |
26.74 |
| 2026-10-08 00:00 |
09:39:04.63 |
+15:48:05.9 |
HIP 47233 |
29.17 |
| 2026-10-08 12:00 |
09:39:26.30 |
+15:46:50.9 |
HIP 47233 |
32.31 |
| 2026-10-09 00:00 |
09:39:47.87 |
+15:45:36.4 |
HIP 47557 |
28.43 |
| 2026-10-09 12:00 |
09:40:09.33 |
+15:44:22.4 |
HIP 47557 |
23.28 |
| 2026-10-10 00:00 |
09:40:30.70 |
+15:43:08.8 |
HIP 47557 |
18.25 |
| 2026-10-10 12:00 |
09:40:51.97 |
+15:41:55.7 |
HIP 47557 |
13.43 |
| 2026-10-11 00:00 |
09:41:13.14 |
+15:40:43.2 |
HIP 47557 |
9.14 |