メタデータ
| 項目 |
値 |
| Designation |
C/2011 C1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-04-18T00:03:10.460160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:48Z |
| Obs used |
613 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
17.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-04-15.0000000 |
| e |
0.99743318 |
| q (au) |
0.883378 |
| a (au) |
344.152599 |
| i (deg) |
16.825617 |
| Ω (om, deg) |
192.438367 |
| ω (w, deg) |
84.473509 |
| M (ma, deg) |
359.999537 |
等級
散乱 + 全体線形
$$
M_a = (14.233 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.233 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.772 |
| k |
0.800 |
| 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 |
| 2011-01-14 |
2011-03-19 |
+10.0801 |
-0.697 |
| 2011-03-19 |
2011-04-17 |
+45.5484 |
-0.310 |
| 2011-04-18 |
2011-06-07 |
-12.9367 |
-3.109 |
| 2011-06-07 |
2011-08-07 |
-10.1926 |
-2.073 |
| 2011-08-07 |
2011-11-18 |
+22.7627 |
-11.126 |
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) |
| 2026-06-01 00:00 |
05:10:54.07 |
+08:20:35.6 |
HIP 24031 |
17.16 |
| 2026-06-01 12:00 |
05:10:57.60 |
+08:20:41.6 |
HIP 24031 |
17.93 |
| 2026-06-02 00:00 |
05:11:01.13 |
+08:20:47.4 |
HIP 24031 |
18.70 |
| 2026-06-02 12:00 |
05:11:04.67 |
+08:20:53.2 |
HIP 24031 |
19.49 |
| 2026-06-03 00:00 |
05:11:08.21 |
+08:20:58.8 |
HIP 24031 |
20.28 |
| 2026-06-03 12:00 |
05:11:11.75 |
+08:21:04.3 |
HIP 24031 |
21.08 |
| 2026-06-04 00:00 |
05:11:15.30 |
+08:21:09.8 |
HIP 24031 |
21.89 |
| 2026-06-04 12:00 |
05:11:18.84 |
+08:21:15.1 |
HIP 24031 |
22.70 |
| 2026-06-05 00:00 |
05:11:22.39 |
+08:21:20.3 |
HIP 24031 |
23.51 |
| 2026-06-05 12:00 |
05:11:25.94 |
+08:21:25.4 |
HIP 24310 |
24.33 |
| 2026-06-06 00:00 |
05:11:29.50 |
+08:21:30.4 |
HIP 24310 |
23.46 |
| 2026-06-06 12:00 |
05:11:33.05 |
+08:21:35.3 |
HIP 24310 |
22.59 |
| 2026-06-07 00:00 |
05:11:36.61 |
+08:21:40.1 |
HIP 24310 |
21.73 |
| 2026-06-07 12:00 |
05:11:40.17 |
+08:21:44.7 |
HIP 24310 |
20.86 |
| 2026-06-08 00:00 |
05:11:43.72 |
+08:21:49.3 |
HIP 24310 |
20.00 |
| 2026-06-08 12:00 |
05:11:47.28 |
+08:21:53.8 |
HIP 24310 |
19.15 |
| 2026-06-09 00:00 |
05:11:50.84 |
+08:21:58.1 |
HIP 24310 |
18.29 |
| 2026-06-09 12:00 |
05:11:54.40 |
+08:22:02.3 |
HIP 24310 |
17.44 |
| 2026-06-10 00:00 |
05:11:57.96 |
+08:22:06.4 |
HIP 24310 |
16.59 |
| 2026-06-10 12:00 |
05:12:01.52 |
+08:22:10.5 |
HIP 24310 |
15.75 |
| 2026-06-11 00:00 |
05:12:05.08 |
+08:22:14.3 |
HIP 24310 |
14.91 |
| 2026-06-11 12:00 |
05:12:08.64 |
+08:22:18.1 |
HIP 24310 |
14.07 |
| 2026-06-12 00:00 |
05:12:12.20 |
+08:22:21.8 |
HIP 24310 |
13.25 |
| 2026-06-12 12:00 |
05:12:15.76 |
+08:22:25.4 |
HIP 24310 |
12.43 |
| 2026-06-13 00:00 |
05:12:19.31 |
+08:22:28.8 |
HIP 24310 |
11.63 |
| 2026-06-13 12:00 |
05:12:22.87 |
+08:22:32.1 |
HIP 24310 |
10.84 |
| 2026-06-14 00:00 |
05:12:26.42 |
+08:22:35.4 |
HIP 24310 |
10.06 |
| 2026-06-14 12:00 |
05:12:29.97 |
+08:22:38.5 |
HIP 24310 |
9.31 |
| 2026-06-15 00:00 |
05:12:33.52 |
+08:22:41.5 |
HIP 24310 |
8.58 |
| 2026-06-15 12:00 |
05:12:37.06 |
+08:22:44.3 |
HIP 24310 |
7.88 |
| 2026-06-16 00:00 |
05:12:40.60 |
+08:22:47.1 |
HIP 24310 |
7.22 |
| 2026-06-16 12:00 |
05:12:44.14 |
+08:22:49.7 |
HIP 24310 |
6.62 |
| 2026-06-17 00:00 |
05:12:47.68 |
+08:22:52.3 |
HIP 24310 |
6.09 |
| 2026-06-17 12:00 |
05:12:51.21 |
+08:22:54.7 |
HIP 24310 |
5.64 |
| 2026-06-18 00:00 |
05:12:54.74 |
+08:22:57.0 |
HIP 24310 |
5.31 |
| 2026-06-18 12:00 |
05:12:58.27 |
+08:22:59.2 |
HIP 24310 |
5.10 |
| 2026-06-19 00:00 |
05:13:01.79 |
+08:23:01.3 |
HIP 24310 |
5.04 |
| 2026-06-19 12:00 |
05:13:05.31 |
+08:23:03.2 |
HIP 24310 |
5.14 |
| 2026-06-20 00:00 |
05:13:08.82 |
+08:23:05.1 |
HIP 24310 |
5.37 |
| 2026-06-20 12:00 |
05:13:12.33 |
+08:23:06.8 |
HIP 24310 |
5.73 |
| 2026-06-21 00:00 |
05:13:15.83 |
+08:23:08.4 |
HIP 24310 |
6.20 |
| 2026-06-21 12:00 |
05:13:19.33 |
+08:23:09.9 |
HIP 24310 |
6.74 |
| 2026-06-22 00:00 |
05:13:22.82 |
+08:23:11.3 |
HIP 24310 |
7.34 |