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) |
| 2026-03-26 00:00 |
07:16:26.99 |
+22:38:45.7 |
HIP 35046 |
35.41 |
| 2026-03-26 12:00 |
07:16:25.84 |
+22:38:44.1 |
HIP 35046 |
35.26 |
| 2026-03-27 00:00 |
07:16:24.73 |
+22:38:42.4 |
HIP 35046 |
35.13 |
| 2026-03-27 12:00 |
07:16:23.64 |
+22:38:40.7 |
HIP 35046 |
35.00 |
| 2026-03-28 00:00 |
07:16:22.59 |
+22:38:38.9 |
HIP 35046 |
34.88 |
| 2026-03-28 12:00 |
07:16:21.57 |
+22:38:37.1 |
HIP 35046 |
34.77 |
| 2026-03-29 00:00 |
07:16:20.58 |
+22:38:35.2 |
HIP 35046 |
34.66 |
| 2026-03-29 12:00 |
07:16:19.62 |
+22:38:33.2 |
HIP 35046 |
34.55 |
| 2026-03-30 00:00 |
07:16:18.70 |
+22:38:31.2 |
HIP 35046 |
34.46 |
| 2026-03-30 12:00 |
07:16:17.81 |
+22:38:29.2 |
HIP 35046 |
34.37 |
| 2026-03-31 00:00 |
07:16:16.95 |
+22:38:27.1 |
HIP 35046 |
34.28 |
| 2026-03-31 12:00 |
07:16:16.12 |
+22:38:24.9 |
HIP 35046 |
34.21 |
| 2026-04-01 00:00 |
07:16:15.33 |
+22:38:22.7 |
HIP 35046 |
34.13 |
| 2026-04-01 12:00 |
07:16:14.56 |
+22:38:20.4 |
HIP 35046 |
34.07 |
| 2026-04-02 00:00 |
07:16:13.83 |
+22:38:18.0 |
HIP 35046 |
34.01 |
| 2026-04-02 12:00 |
07:16:13.13 |
+22:38:15.6 |
HIP 35046 |
33.95 |
| 2026-04-03 00:00 |
07:16:12.47 |
+22:38:13.2 |
HIP 35046 |
33.90 |
| 2026-04-03 12:00 |
07:16:11.84 |
+22:38:10.7 |
HIP 35046 |
33.86 |
| 2026-04-04 00:00 |
07:16:11.23 |
+22:38:08.1 |
HIP 35046 |
33.82 |
| 2026-04-04 12:00 |
07:16:10.66 |
+22:38:05.5 |
HIP 35046 |
33.79 |
| 2026-04-05 00:00 |
07:16:10.13 |
+22:38:02.8 |
HIP 35046 |
33.76 |
| 2026-04-05 12:00 |
07:16:09.62 |
+22:38:00.0 |
HIP 35046 |
33.74 |
| 2026-04-06 00:00 |
07:16:09.15 |
+22:37:57.2 |
HIP 35046 |
33.72 |
| 2026-04-06 12:00 |
07:16:08.71 |
+22:37:54.4 |
HIP 35046 |
33.71 |
| 2026-04-07 00:00 |
07:16:08.30 |
+22:37:51.5 |
HIP 35046 |
33.70 |
| 2026-04-07 12:00 |
07:16:07.92 |
+22:37:48.5 |
HIP 35046 |
33.70 |
| 2026-04-08 00:00 |
07:16:07.58 |
+22:37:45.5 |
HIP 35046 |
33.70 |
| 2026-04-08 12:00 |
07:16:07.27 |
+22:37:42.4 |
HIP 35046 |
33.71 |
| 2026-04-09 00:00 |
07:16:06.99 |
+22:37:39.3 |
HIP 35046 |
33.72 |
| 2026-04-09 12:00 |
07:16:06.74 |
+22:37:36.1 |
HIP 35046 |
33.73 |
| 2026-04-10 00:00 |
07:16:06.52 |
+22:37:32.9 |
HIP 35046 |
33.76 |
| 2026-04-10 12:00 |
07:16:06.34 |
+22:37:29.6 |
HIP 35046 |
33.78 |
| 2026-04-11 00:00 |
07:16:06.19 |
+22:37:26.2 |
HIP 35046 |
33.81 |
| 2026-04-11 12:00 |
07:16:06.07 |
+22:37:22.8 |
HIP 35046 |
33.85 |
| 2026-04-12 00:00 |
07:16:05.98 |
+22:37:19.4 |
HIP 35046 |
33.89 |
| 2026-04-12 12:00 |
07:16:05.92 |
+22:37:15.9 |
HIP 35046 |
33.93 |
| 2026-04-13 00:00 |
07:16:05.89 |
+22:37:12.3 |
HIP 35046 |
33.98 |
| 2026-04-13 12:00 |
07:16:05.90 |
+22:37:08.7 |
HIP 35046 |
34.03 |
| 2026-04-14 00:00 |
07:16:05.94 |
+22:37:05.0 |
HIP 35046 |
34.09 |
| 2026-04-14 12:00 |
07:16:06.01 |
+22:37:01.2 |
HIP 35046 |
34.15 |
| 2026-04-15 00:00 |
07:16:06.11 |
+22:36:57.5 |
HIP 35046 |
34.22 |
| 2026-04-15 12:00 |
07:16:06.24 |
+22:36:53.6 |
HIP 35046 |
34.29 |
| 2026-04-16 00:00 |
07:16:06.41 |
+22:36:49.7 |
HIP 35046 |
34.37 |