メタデータ
| 項目 |
値 |
| Designation |
C/2011 L1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-12-18T07:14:56.696640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:51Z |
| Obs used |
140 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
12.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-06-22.0000000 |
| e |
0.79679852 |
| q (au) |
2.242374 |
| a (au) |
11.035223 |
| i (deg) |
65.512678 |
| Ω (om, deg) |
252.363846 |
| ω (w, deg) |
294.470660 |
| M (ma, deg) |
4.992746 |
等級
散乱 + 全体線形
$$
M_a = (13.123 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.123 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.781 |
| k |
0.999 |
| 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 |
| 2011-06-02 |
2012-07-23 |
-10.7811 |
+4.882 |
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 |
23:05:16.48 |
+60:17:09.0 |
HIP 113853 |
16.91 |
| 2026-06-01 12:00 |
23:05:18.69 |
+60:18:31.6 |
HIP 113853 |
16.40 |
| 2026-06-02 00:00 |
23:05:20.81 |
+60:19:54.2 |
HIP 113853 |
15.99 |
| 2026-06-02 12:00 |
23:05:22.84 |
+60:21:16.7 |
HIP 113853 |
15.69 |
| 2026-06-03 00:00 |
23:05:24.78 |
+60:22:39.1 |
HIP 113853 |
15.49 |
| 2026-06-03 12:00 |
23:05:26.63 |
+60:24:01.5 |
HIP 113853 |
15.41 |
| 2026-06-04 00:00 |
23:05:28.39 |
+60:25:23.8 |
HIP 113853 |
15.44 |
| 2026-06-04 12:00 |
23:05:30.07 |
+60:26:46.1 |
HIP 113853 |
15.58 |
| 2026-06-05 00:00 |
23:05:31.65 |
+60:28:08.3 |
HIP 113853 |
15.83 |
| 2026-06-05 12:00 |
23:05:33.14 |
+60:29:30.4 |
HIP 113853 |
16.19 |
| 2026-06-06 00:00 |
23:05:34.54 |
+60:30:52.5 |
HIP 113853 |
16.64 |
| 2026-06-06 12:00 |
23:05:35.85 |
+60:32:14.4 |
HIP 113853 |
17.18 |
| 2026-06-07 00:00 |
23:05:37.07 |
+60:33:36.3 |
HIP 113853 |
17.80 |
| 2026-06-07 12:00 |
23:05:38.20 |
+60:34:58.0 |
HIP 113853 |
18.49 |
| 2026-06-08 00:00 |
23:05:39.24 |
+60:36:19.7 |
HIP 114161 |
17.57 |
| 2026-06-08 12:00 |
23:05:40.18 |
+60:37:41.3 |
HIP 114161 |
16.46 |
| 2026-06-09 00:00 |
23:05:41.03 |
+60:39:02.7 |
HIP 114161 |
15.40 |
| 2026-06-09 12:00 |
23:05:41.79 |
+60:40:24.1 |
HIP 114161 |
14.40 |
| 2026-06-10 00:00 |
23:05:42.46 |
+60:41:45.3 |
HIP 114161 |
13.47 |
| 2026-06-10 12:00 |
23:05:43.04 |
+60:43:06.4 |
HIP 114161 |
12.63 |
| 2026-06-11 00:00 |
23:05:43.52 |
+60:44:27.3 |
HIP 114161 |
11.90 |
| 2026-06-11 12:00 |
23:05:43.91 |
+60:45:48.1 |
HIP 114161 |
11.29 |
| 2026-06-12 00:00 |
23:05:44.20 |
+60:47:08.8 |
HIP 114161 |
10.83 |
| 2026-06-12 12:00 |
23:05:44.40 |
+60:48:29.3 |
HIP 114161 |
10.53 |
| 2026-06-13 00:00 |
23:05:44.51 |
+60:49:49.7 |
HIP 114161 |
10.42 |
| 2026-06-13 12:00 |
23:05:44.52 |
+60:51:09.9 |
HIP 114161 |
10.48 |
| 2026-06-14 00:00 |
23:05:44.44 |
+60:52:29.9 |
HIP 114161 |
10.72 |
| 2026-06-14 12:00 |
23:05:44.27 |
+60:53:49.7 |
HIP 114161 |
11.13 |
| 2026-06-15 00:00 |
23:05:43.99 |
+60:55:09.4 |
HIP 114161 |
11.69 |
| 2026-06-15 12:00 |
23:05:43.63 |
+60:56:28.9 |
HIP 114161 |
12.37 |
| 2026-06-16 00:00 |
23:05:43.17 |
+60:57:48.2 |
HIP 114161 |
13.16 |
| 2026-06-16 12:00 |
23:05:42.61 |
+60:59:07.3 |
HIP 114161 |
14.03 |
| 2026-06-17 00:00 |
23:05:41.96 |
+61:00:26.2 |
HIP 114161 |
14.98 |
| 2026-06-17 12:00 |
23:05:41.22 |
+61:01:44.9 |
HIP 114161 |
15.98 |
| 2026-06-18 00:00 |
23:05:40.38 |
+61:03:03.3 |
HIP 114161 |
17.03 |
| 2026-06-18 12:00 |
23:05:39.44 |
+61:04:21.6 |
HIP 114161 |
18.12 |
| 2026-06-19 00:00 |
23:05:38.41 |
+61:05:39.6 |
HIP 114161 |
19.24 |
| 2026-06-19 12:00 |
23:05:37.28 |
+61:06:57.4 |
HIP 114161 |
20.39 |
| 2026-06-20 00:00 |
23:05:36.06 |
+61:08:14.9 |
HIP 114092 |
19.22 |
| 2026-06-20 12:00 |
23:05:34.75 |
+61:09:32.2 |
HIP 114092 |
18.07 |
| 2026-06-21 00:00 |
23:05:33.34 |
+61:10:49.3 |
HIP 114092 |
16.94 |
| 2026-06-21 12:00 |
23:05:31.83 |
+61:12:06.1 |
HIP 114092 |
15.84 |
| 2026-06-22 00:00 |
23:05:30.23 |
+61:13:22.6 |
HIP 114092 |
14.79 |