C/2011 L2 (McNaught)
メタデータ
| 項目 |
値 |
| Designation |
C/2011 L2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-11-01T06:33:18.060480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:51Z |
| Obs used |
57 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
13.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-09-08.0000000 |
| e |
1.00177257 |
| q (au) |
1.943449 |
| a (au) |
-1096.399619 |
| i (deg) |
104.257426 |
| Ω (om, deg) |
131.347725 |
| ω (w, deg) |
257.028128 |
| M (ma, deg) |
-0.001473 |
等級
散乱 + 全体線形
$$
M_a = (18.228 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.228 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
09:07:05.93 |
+66:47:48.9 |
HIP 44695 |
6.54 |
| 2026-02-03 12:00 |
09:06:56.45 |
+66:48:03.7 |
HIP 44695 |
6.29 |
| 2026-02-04 00:00 |
09:06:46.97 |
+66:48:18.0 |
HIP 44695 |
6.18 |
| 2026-02-04 12:00 |
09:06:37.49 |
+66:48:31.9 |
HIP 44695 |
6.20 |
| 2026-02-05 00:00 |
09:06:28.00 |
+66:48:45.4 |
HIP 44695 |
6.37 |
| 2026-02-05 12:00 |
09:06:18.53 |
+66:48:58.4 |
HIP 44695 |
6.67 |
| 2026-02-06 00:00 |
09:06:09.05 |
+66:49:11.0 |
HIP 44695 |
7.08 |
| 2026-02-06 12:00 |
09:05:59.58 |
+66:49:23.2 |
HIP 44695 |
7.58 |
| 2026-02-07 00:00 |
09:05:50.11 |
+66:49:34.9 |
HIP 44695 |
8.16 |
| 2026-02-07 12:00 |
09:05:40.65 |
+66:49:46.2 |
HIP 44695 |
8.79 |
| 2026-02-08 00:00 |
09:05:31.19 |
+66:49:57.1 |
HIP 44695 |
9.48 |
| 2026-02-08 12:00 |
09:05:21.74 |
+66:50:07.5 |
HIP 44695 |
10.20 |
| 2026-02-09 00:00 |
09:05:12.30 |
+66:50:17.4 |
HIP 44695 |
10.94 |
| 2026-02-09 12:00 |
09:05:02.87 |
+66:50:27.0 |
HIP 44695 |
11.71 |
| 2026-02-10 00:00 |
09:04:53.45 |
+66:50:36.1 |
HIP 44695 |
12.50 |
| 2026-02-10 12:00 |
09:04:44.03 |
+66:50:44.7 |
HIP 44695 |
13.31 |
| 2026-02-11 00:00 |
09:04:34.64 |
+66:50:53.0 |
HIP 44695 |
14.12 |
| 2026-02-11 12:00 |
09:04:25.25 |
+66:51:00.8 |
HIP 44695 |
14.94 |
| 2026-02-12 00:00 |
09:04:15.88 |
+66:51:08.1 |
HIP 44695 |
15.77 |
| 2026-02-12 12:00 |
09:04:06.52 |
+66:51:15.0 |
HIP 44695 |
16.61 |
| 2026-02-13 00:00 |
09:03:57.18 |
+66:51:21.5 |
HIP 44695 |
17.45 |
| 2026-02-13 12:00 |
09:03:47.85 |
+66:51:27.5 |
HIP 44695 |
18.29 |
| 2026-02-14 00:00 |
09:03:38.54 |
+66:51:33.1 |
HIP 44695 |
19.14 |
| 2026-02-14 12:00 |
09:03:29.25 |
+66:51:38.2 |
HIP 44695 |
19.99 |
| 2026-02-15 00:00 |
09:03:19.98 |
+66:51:43.0 |
HIP 44695 |
20.84 |
| 2026-02-15 12:00 |
09:03:10.73 |
+66:51:47.2 |
HIP 44695 |
21.69 |
| 2026-02-16 00:00 |
09:03:01.50 |
+66:51:51.1 |
HIP 44695 |
22.54 |
| 2026-02-16 12:00 |
09:02:52.29 |
+66:51:54.5 |
HIP 44695 |
23.39 |
| 2026-02-17 00:00 |
09:02:43.10 |
+66:51:57.4 |
HIP 44695 |
24.23 |
| 2026-02-17 12:00 |
09:02:33.94 |
+66:52:00.0 |
HIP 44112 |
24.06 |
| 2026-02-18 00:00 |
09:02:24.80 |
+66:52:02.0 |
HIP 44112 |
23.28 |
| 2026-02-18 12:00 |
09:02:15.69 |
+66:52:03.7 |
HIP 44112 |
22.51 |
| 2026-02-19 00:00 |
09:02:06.60 |
+66:52:04.9 |
HIP 44112 |
21.77 |
| 2026-02-19 12:00 |
09:01:57.55 |
+66:52:05.7 |
HIP 44112 |
21.04 |
| 2026-02-20 00:00 |
09:01:48.52 |
+66:52:06.0 |
HIP 44112 |
20.33 |
| 2026-02-20 12:00 |
09:01:39.52 |
+66:52:05.9 |
HIP 44112 |
19.64 |
| 2026-02-21 00:00 |
09:01:30.54 |
+66:52:05.4 |
HIP 44112 |
18.97 |
| 2026-02-21 12:00 |
09:01:21.60 |
+66:52:04.5 |
HIP 44112 |
18.33 |
| 2026-02-22 00:00 |
09:01:12.70 |
+66:52:03.1 |
HIP 44112 |
17.71 |
| 2026-02-22 12:00 |
09:01:03.82 |
+66:52:01.3 |
HIP 44112 |
17.13 |
| 2026-02-23 00:00 |
09:00:54.98 |
+66:51:59.1 |
HIP 44112 |
16.57 |
| 2026-02-23 12:00 |
09:00:46.17 |
+66:51:56.4 |
HIP 44112 |
16.06 |
| 2026-02-24 00:00 |
09:00:37.40 |
+66:51:53.3 |
HIP 44112 |
15.58 |