C/2005 L3 (McNaught)
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
$$
M_a = (5.594 + 2.592\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.594 |
| n |
2.592 |
| gf |
1.000 |
| gb |
-0.503 |
| 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 |
+3.1764 |
-2.092 |
| 2008-01-25 |
2010-02-06 |
-2.6369 |
+1.883 |
| 2010-02-06 |
2014-01-09 |
-0.4137 |
+0.227 |
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) |
| 2026-02-03 00:00 |
07:20:57.46 |
+22:36:38.2 |
HIP 35616 |
1.52 |
| 2026-02-03 12:00 |
07:20:53.62 |
+22:36:41.9 |
HIP 35616 |
1.91 |
| 2026-02-04 00:00 |
07:20:49.80 |
+22:36:45.6 |
HIP 35616 |
2.56 |
| 2026-02-04 12:00 |
07:20:45.99 |
+22:36:49.3 |
HIP 35616 |
3.32 |
| 2026-02-05 00:00 |
07:20:42.20 |
+22:36:52.9 |
HIP 35616 |
4.12 |
| 2026-02-05 12:00 |
07:20:38.42 |
+22:36:56.4 |
HIP 35616 |
4.94 |
| 2026-02-06 00:00 |
07:20:34.66 |
+22:37:00.0 |
HIP 35616 |
5.78 |
| 2026-02-06 12:00 |
07:20:30.92 |
+22:37:03.4 |
HIP 35616 |
6.62 |
| 2026-02-07 00:00 |
07:20:27.20 |
+22:37:06.9 |
HIP 35616 |
7.46 |
| 2026-02-07 12:00 |
07:20:23.49 |
+22:37:10.3 |
HIP 35616 |
8.30 |
| 2026-02-08 00:00 |
07:20:19.80 |
+22:37:13.6 |
HIP 35616 |
9.14 |
| 2026-02-08 12:00 |
07:20:16.13 |
+22:37:16.9 |
HIP 35616 |
9.98 |
| 2026-02-09 00:00 |
07:20:12.48 |
+22:37:20.2 |
HIP 35616 |
10.81 |
| 2026-02-09 12:00 |
07:20:08.85 |
+22:37:23.5 |
HIP 35616 |
11.65 |
| 2026-02-10 00:00 |
07:20:05.23 |
+22:37:26.6 |
HIP 35616 |
12.48 |
| 2026-02-10 12:00 |
07:20:01.64 |
+22:37:29.8 |
HIP 35545 |
12.91 |
| 2026-02-11 00:00 |
07:19:58.07 |
+22:37:32.9 |
HIP 35545 |
13.05 |
| 2026-02-11 12:00 |
07:19:54.51 |
+22:37:35.9 |
HIP 35545 |
13.25 |
| 2026-02-12 00:00 |
07:19:50.98 |
+22:37:39.0 |
HIP 35545 |
13.49 |
| 2026-02-12 12:00 |
07:19:47.46 |
+22:37:41.9 |
HIP 35545 |
13.77 |
| 2026-02-13 00:00 |
07:19:43.97 |
+22:37:44.8 |
HIP 35545 |
14.09 |
| 2026-02-13 12:00 |
07:19:40.50 |
+22:37:47.7 |
HIP 35545 |
14.44 |
| 2026-02-14 00:00 |
07:19:37.05 |
+22:37:50.5 |
HIP 35545 |
14.83 |
| 2026-02-14 12:00 |
07:19:33.62 |
+22:37:53.3 |
HIP 35545 |
15.25 |
| 2026-02-15 00:00 |
07:19:30.21 |
+22:37:56.1 |
HIP 35545 |
15.69 |
| 2026-02-15 12:00 |
07:19:26.82 |
+22:37:58.8 |
HIP 35545 |
16.15 |
| 2026-02-16 00:00 |
07:19:23.46 |
+22:38:01.4 |
HIP 35545 |
16.64 |
| 2026-02-16 12:00 |
07:19:20.12 |
+22:38:04.0 |
HIP 35545 |
17.14 |
| 2026-02-17 00:00 |
07:19:16.80 |
+22:38:06.5 |
HIP 35545 |
17.66 |
| 2026-02-17 12:00 |
07:19:13.51 |
+22:38:09.0 |
HIP 35545 |
18.19 |
| 2026-02-18 00:00 |
07:19:10.24 |
+22:38:11.5 |
HIP 35545 |
18.74 |
| 2026-02-18 12:00 |
07:19:06.99 |
+22:38:13.9 |
HIP 35545 |
19.29 |
| 2026-02-19 00:00 |
07:19:03.76 |
+22:38:16.2 |
HIP 35545 |
19.85 |
| 2026-02-19 12:00 |
07:19:00.56 |
+22:38:18.5 |
HIP 35545 |
20.42 |
| 2026-02-20 00:00 |
07:18:57.39 |
+22:38:20.8 |
HIP 35545 |
21.00 |
| 2026-02-20 12:00 |
07:18:54.23 |
+22:38:23.0 |
HIP 35545 |
21.58 |
| 2026-02-21 00:00 |
07:18:51.11 |
+22:38:25.1 |
HIP 35545 |
22.16 |
| 2026-02-21 12:00 |
07:18:48.00 |
+22:38:27.2 |
HIP 35545 |
22.74 |
| 2026-02-22 00:00 |
07:18:44.93 |
+22:38:29.2 |
HIP 35545 |
23.33 |
| 2026-02-22 12:00 |
07:18:41.87 |
+22:38:31.2 |
HIP 35545 |
23.92 |
| 2026-02-23 00:00 |
07:18:38.85 |
+22:38:33.2 |
HIP 35545 |
24.51 |
| 2026-02-23 12:00 |
07:18:35.85 |
+22:38:35.0 |
HIP 35545 |
25.11 |
| 2026-02-24 00:00 |
07:18:32.87 |
+22:38:36.9 |
HIP 35545 |
25.70 |