メタデータ
| 項目 |
値 |
| Designation |
C/2005 L3 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-01-16T08:18:53.772480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:51Z |
| Obs used |
5219 |
| NEO |
- |
| M1 |
8.400 |
| 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) |
2008-09-20.0000000 |
| e |
0.99958663 |
| q (au) |
5.593628 |
| a (au) |
13531.707446 |
| i (deg) |
139.449247 |
| Ω (om, deg) |
288.739815 |
| ω (w, deg) |
47.133870 |
| M (ma, deg) |
0.000155 |
等級
散乱 + 全体線形
$$
M_a = (5.595 + 2.591\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.595 |
| n |
2.591 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2004-07-16 |
2008-01-12 |
+3.1774 |
-2.093 |
| 2008-01-25 |
2010-02-06 |
-2.6501 |
+1.894 |
| 2010-02-06 |
2014-01-09 |
-0.3685 |
+0.184 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
07:16:55.53 |
+22:32:16.7 |
HIP 35106 |
39.16 |
| 2026-05-12 12:00 |
07:16:57.20 |
+22:32:10.2 |
HIP 35106 |
39.26 |
| 2026-05-13 00:00 |
07:16:58.89 |
+22:32:03.6 |
HIP 35106 |
39.36 |
| 2026-05-13 12:00 |
07:17:00.60 |
+22:31:57.0 |
HIP 35106 |
39.46 |
| 2026-05-14 00:00 |
07:17:02.34 |
+22:31:50.4 |
HIP 35106 |
39.57 |
| 2026-05-14 12:00 |
07:17:04.11 |
+22:31:43.7 |
HIP 35106 |
39.69 |
| 2026-05-15 00:00 |
07:17:05.90 |
+22:31:37.0 |
HIP 35106 |
39.82 |
| 2026-05-15 12:00 |
07:17:07.71 |
+22:31:30.2 |
HIP 35106 |
39.95 |
| 2026-05-16 00:00 |
07:17:09.54 |
+22:31:23.4 |
HIP 35106 |
40.09 |
| 2026-05-16 12:00 |
07:17:11.40 |
+22:31:16.6 |
HIP 35106 |
40.23 |
| 2026-05-17 00:00 |
07:17:13.29 |
+22:31:09.7 |
HIP 35106 |
40.38 |
| 2026-05-17 12:00 |
07:17:15.19 |
+22:31:02.8 |
HIP 35545 |
40.03 |
| 2026-05-18 00:00 |
07:17:17.12 |
+22:30:55.8 |
HIP 35545 |
39.57 |
| 2026-05-18 12:00 |
07:17:19.07 |
+22:30:48.8 |
HIP 35545 |
39.11 |
| 2026-05-19 00:00 |
07:17:21.05 |
+22:30:41.7 |
HIP 35545 |
38.64 |
| 2026-05-19 12:00 |
07:17:23.04 |
+22:30:34.6 |
HIP 35545 |
38.17 |
| 2026-05-20 00:00 |
07:17:25.06 |
+22:30:27.5 |
HIP 35545 |
37.69 |
| 2026-05-20 12:00 |
07:17:27.10 |
+22:30:20.3 |
HIP 35545 |
37.20 |
| 2026-05-21 00:00 |
07:17:29.17 |
+22:30:13.1 |
HIP 35545 |
36.71 |
| 2026-05-21 12:00 |
07:17:31.25 |
+22:30:05.9 |
HIP 35545 |
36.22 |
| 2026-05-22 00:00 |
07:17:33.36 |
+22:29:58.6 |
HIP 35545 |
35.72 |
| 2026-05-22 12:00 |
07:17:35.49 |
+22:29:51.2 |
HIP 35545 |
35.22 |
| 2026-05-23 00:00 |
07:17:37.63 |
+22:29:43.9 |
HIP 35545 |
34.71 |
| 2026-05-23 12:00 |
07:17:39.80 |
+22:29:36.5 |
HIP 35545 |
34.19 |
| 2026-05-24 00:00 |
07:17:41.99 |
+22:29:29.0 |
HIP 35545 |
33.68 |
| 2026-05-24 12:00 |
07:17:44.20 |
+22:29:21.6 |
HIP 35545 |
33.15 |
| 2026-05-25 00:00 |
07:17:46.43 |
+22:29:14.0 |
HIP 35545 |
32.62 |
| 2026-05-25 12:00 |
07:17:48.68 |
+22:29:06.5 |
HIP 35545 |
32.09 |
| 2026-05-26 00:00 |
07:17:50.96 |
+22:28:58.9 |
HIP 35545 |
31.56 |
| 2026-05-26 12:00 |
07:17:53.25 |
+22:28:51.3 |
HIP 35545 |
31.01 |
| 2026-05-27 00:00 |
07:17:55.55 |
+22:28:43.6 |
HIP 35545 |
30.47 |
| 2026-05-27 12:00 |
07:17:57.88 |
+22:28:35.9 |
HIP 35545 |
29.92 |
| 2026-05-28 00:00 |
07:18:00.23 |
+22:28:28.2 |
HIP 35545 |
29.36 |
| 2026-05-28 12:00 |
07:18:02.60 |
+22:28:20.5 |
HIP 35545 |
28.81 |
| 2026-05-29 00:00 |
07:18:04.98 |
+22:28:12.7 |
HIP 35545 |
28.24 |
| 2026-05-29 12:00 |
07:18:07.39 |
+22:28:04.8 |
HIP 35545 |
27.67 |
| 2026-05-30 00:00 |
07:18:09.81 |
+22:27:57.0 |
HIP 35545 |
27.10 |
| 2026-05-30 12:00 |
07:18:12.25 |
+22:27:49.1 |
HIP 35545 |
26.53 |
| 2026-05-31 00:00 |
07:18:14.71 |
+22:27:41.2 |
HIP 35545 |
25.95 |
| 2026-05-31 12:00 |
07:18:17.18 |
+22:27:33.2 |
HIP 35545 |
25.37 |
| 2026-06-01 00:00 |
07:18:19.68 |
+22:27:25.2 |
HIP 35545 |
24.78 |
| 2026-06-01 12:00 |
07:18:22.19 |
+22:27:17.2 |
HIP 35545 |
24.19 |
| 2026-06-02 00:00 |
07:18:24.71 |
+22:27:09.1 |
HIP 35545 |
23.59 |