C/2011 R1 (McNaught)
メタデータ
| 項目 |
値 |
| Designation |
C/2011 R1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-10-19T14:54:08.481600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:56Z |
| Obs used |
1454 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
6.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-10-24.0000000 |
| e |
1.00074117 |
| q (au) |
2.079571 |
| a (au) |
-2805.810838 |
| i (deg) |
116.196842 |
| Ω (om, deg) |
221.408458 |
| ω (w, deg) |
308.861192 |
| M (ma, deg) |
0.000029 |
等級
散乱 + 全体線形
$$
M_a = (10.666 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.666 |
| n |
2.000 |
| 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 |
| 2010-10-11 |
2012-04-01 |
+7.1902 |
-6.300 |
| 2012-04-01 |
2012-10-15 |
-6.1910 |
-0.092 |
| 2012-12-23 |
2013-02-17 |
+39.6659 |
-16.680 |
| 2013-02-17 |
2014-04-11 |
+3.1359 |
-1.430 |
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 |
11:44:05.80 |
+80:38:39.3 |
HIP 57094 |
5.89 |
| 2026-02-03 12:00 |
11:43:47.31 |
+80:39:26.1 |
HIP 57094 |
5.91 |
| 2026-02-04 00:00 |
11:43:28.64 |
+80:40:12.4 |
HIP 57094 |
6.13 |
| 2026-02-04 12:00 |
11:43:09.79 |
+80:40:58.3 |
HIP 57094 |
6.51 |
| 2026-02-05 00:00 |
11:42:50.76 |
+80:41:43.7 |
HIP 57094 |
7.03 |
| 2026-02-05 12:00 |
11:42:31.55 |
+80:42:28.7 |
HIP 57094 |
7.66 |
| 2026-02-06 00:00 |
11:42:12.17 |
+80:43:13.3 |
HIP 56828 |
7.95 |
| 2026-02-06 12:00 |
11:41:52.62 |
+80:43:57.3 |
HIP 56828 |
7.07 |
| 2026-02-07 00:00 |
11:41:32.90 |
+80:44:40.9 |
HIP 56828 |
6.24 |
| 2026-02-07 12:00 |
11:41:13.01 |
+80:45:24.1 |
HIP 56828 |
5.49 |
| 2026-02-08 00:00 |
11:40:52.95 |
+80:46:06.7 |
HIP 56828 |
4.87 |
| 2026-02-08 12:00 |
11:40:32.72 |
+80:46:48.9 |
HIP 56828 |
4.40 |
| 2026-02-09 00:00 |
11:40:12.33 |
+80:47:30.6 |
HIP 56828 |
4.17 |
| 2026-02-09 12:00 |
11:39:51.77 |
+80:48:11.8 |
HIP 56828 |
4.19 |
| 2026-02-10 00:00 |
11:39:31.06 |
+80:48:52.5 |
HIP 56828 |
4.47 |
| 2026-02-10 12:00 |
11:39:10.18 |
+80:49:32.7 |
HIP 56828 |
4.96 |
| 2026-02-11 00:00 |
11:38:49.15 |
+80:50:12.4 |
HIP 56828 |
5.60 |
| 2026-02-11 12:00 |
11:38:27.96 |
+80:50:51.6 |
HIP 56828 |
6.36 |
| 2026-02-12 00:00 |
11:38:06.62 |
+80:51:30.3 |
HIP 56828 |
7.19 |
| 2026-02-12 12:00 |
11:37:45.13 |
+80:52:08.5 |
HIP 56828 |
8.07 |
| 2026-02-13 00:00 |
11:37:23.49 |
+80:52:46.1 |
HIP 56828 |
8.98 |
| 2026-02-13 12:00 |
11:37:01.70 |
+80:53:23.2 |
HIP 56828 |
9.92 |
| 2026-02-14 00:00 |
11:36:39.77 |
+80:53:59.8 |
HIP 56828 |
10.88 |
| 2026-02-14 12:00 |
11:36:17.70 |
+80:54:35.9 |
HIP 56828 |
11.85 |
| 2026-02-15 00:00 |
11:35:55.48 |
+80:55:11.4 |
HIP 56828 |
12.83 |
| 2026-02-15 12:00 |
11:35:33.13 |
+80:55:46.4 |
HIP 56828 |
13.82 |
| 2026-02-16 00:00 |
11:35:10.65 |
+80:56:20.9 |
HIP 56123 |
12.88 |
| 2026-02-16 12:00 |
11:34:48.03 |
+80:56:54.8 |
HIP 56123 |
11.83 |
| 2026-02-17 00:00 |
11:34:25.28 |
+80:57:28.1 |
HIP 56123 |
10.78 |
| 2026-02-17 12:00 |
11:34:02.40 |
+80:58:00.9 |
HIP 56123 |
9.74 |
| 2026-02-18 00:00 |
11:33:39.39 |
+80:58:33.2 |
HIP 56123 |
8.69 |
| 2026-02-18 12:00 |
11:33:16.27 |
+80:59:04.8 |
HIP 56123 |
7.65 |
| 2026-02-19 00:00 |
11:32:53.02 |
+80:59:35.9 |
HIP 56123 |
6.60 |
| 2026-02-19 12:00 |
11:32:29.66 |
+81:00:06.5 |
HIP 56123 |
5.56 |
| 2026-02-20 00:00 |
11:32:06.19 |
+81:00:36.4 |
HIP 56123 |
4.52 |
| 2026-02-20 12:00 |
11:31:42.60 |
+81:01:05.8 |
HIP 56123 |
3.49 |
| 2026-02-21 00:00 |
11:31:18.90 |
+81:01:34.6 |
HIP 56123 |
2.46 |
| 2026-02-21 12:00 |
11:30:55.10 |
+81:02:02.9 |
HIP 56123 |
1.46 |
| 2026-02-22 00:00 |
11:30:31.20 |
+81:02:30.5 |
HIP 56123 |
0.58 |
| 2026-02-22 12:00 |
11:30:07.19 |
+81:02:57.6 |
HIP 56118 |
0.54 |
| 2026-02-23 00:00 |
11:29:43.09 |
+81:03:24.1 |
HIP 56118 |
1.47 |
| 2026-02-23 12:00 |
11:29:18.89 |
+81:03:50.0 |
HIP 56118 |
2.48 |
| 2026-02-24 00:00 |
11:28:54.61 |
+81:04:15.3 |
HIP 56118 |
3.50 |