C/2011 Q2 (McNaught)
メタデータ
| 項目 |
値 |
| Designation |
C/2011 Q2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-01-19T18:55:25.829760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:55Z |
| Obs used |
106 |
| NEO |
- |
| M1 |
4.700 |
| K1 |
23.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-09-16.0000000 |
| e |
1.00007496 |
| q (au) |
1.349561 |
| a (au) |
-18003.301883 |
| i (deg) |
36.866576 |
| Ω (om, deg) |
287.369526 |
| ω (w, deg) |
34.628570 |
| M (ma, deg) |
-0.000051 |
等級
散乱 + 全体線形
$$
M_a = (10.734 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.734 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.502 |
| 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 |
| 2011-08-26 |
2011-10-19 |
+14.2534 |
-5.452 |
| 2012-04-01 |
2012-04-26 |
+4.3329 |
+1.097 |
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 |
07:44:10.95 |
+14:18:51.4 |
HIP 37708 |
8.47 |
| 2026-02-03 12:00 |
07:44:07.33 |
+14:19:01.2 |
HIP 37708 |
8.64 |
| 2026-02-04 00:00 |
07:44:03.71 |
+14:19:11.1 |
HIP 37708 |
8.91 |
| 2026-02-04 12:00 |
07:44:00.11 |
+14:19:21.0 |
HIP 37708 |
9.25 |
| 2026-02-05 00:00 |
07:43:56.53 |
+14:19:30.9 |
HIP 37708 |
9.66 |
| 2026-02-05 12:00 |
07:43:52.96 |
+14:19:40.8 |
HIP 37708 |
10.13 |
| 2026-02-06 00:00 |
07:43:49.40 |
+14:19:50.7 |
HIP 37708 |
10.65 |
| 2026-02-06 12:00 |
07:43:45.86 |
+14:20:00.7 |
HIP 37708 |
11.21 |
| 2026-02-07 00:00 |
07:43:42.33 |
+14:20:10.6 |
HIP 37708 |
11.81 |
| 2026-02-07 12:00 |
07:43:38.82 |
+14:20:20.6 |
HIP 37708 |
12.44 |
| 2026-02-08 00:00 |
07:43:35.32 |
+14:20:30.6 |
HIP 37708 |
13.10 |
| 2026-02-08 12:00 |
07:43:31.84 |
+14:20:40.6 |
HIP 37708 |
13.78 |
| 2026-02-09 00:00 |
07:43:28.37 |
+14:20:50.7 |
HIP 37708 |
14.47 |
| 2026-02-09 12:00 |
07:43:24.92 |
+14:21:00.7 |
HIP 37708 |
15.17 |
| 2026-02-10 00:00 |
07:43:21.49 |
+14:21:10.8 |
HIP 37708 |
15.89 |
| 2026-02-10 12:00 |
07:43:18.07 |
+14:21:20.8 |
HIP 37708 |
16.62 |
| 2026-02-11 00:00 |
07:43:14.67 |
+14:21:30.9 |
HIP 37708 |
17.36 |
| 2026-02-11 12:00 |
07:43:11.29 |
+14:21:41.0 |
HIP 37708 |
18.10 |
| 2026-02-12 00:00 |
07:43:07.93 |
+14:21:51.0 |
HIP 37521 |
18.25 |
| 2026-02-12 12:00 |
07:43:04.58 |
+14:22:01.1 |
HIP 37521 |
17.65 |
| 2026-02-13 00:00 |
07:43:01.25 |
+14:22:11.2 |
HIP 37521 |
17.07 |
| 2026-02-13 12:00 |
07:42:57.94 |
+14:22:21.3 |
HIP 37521 |
16.51 |
| 2026-02-14 00:00 |
07:42:54.65 |
+14:22:31.4 |
HIP 37521 |
15.98 |
| 2026-02-14 12:00 |
07:42:51.38 |
+14:22:41.5 |
HIP 37521 |
15.48 |
| 2026-02-15 00:00 |
07:42:48.13 |
+14:22:51.6 |
HIP 37521 |
15.02 |
| 2026-02-15 12:00 |
07:42:44.90 |
+14:23:01.7 |
HIP 37521 |
14.58 |
| 2026-02-16 00:00 |
07:42:41.69 |
+14:23:11.8 |
HIP 37521 |
14.18 |
| 2026-02-16 12:00 |
07:42:38.50 |
+14:23:21.9 |
HIP 37521 |
13.81 |
| 2026-02-17 00:00 |
07:42:35.32 |
+14:23:32.0 |
HIP 37521 |
13.49 |
| 2026-02-17 12:00 |
07:42:32.17 |
+14:23:42.0 |
HIP 37521 |
13.21 |
| 2026-02-18 00:00 |
07:42:29.05 |
+14:23:52.1 |
HIP 37521 |
12.97 |
| 2026-02-18 12:00 |
07:42:25.94 |
+14:24:02.2 |
HIP 37521 |
12.77 |
| 2026-02-19 00:00 |
07:42:22.85 |
+14:24:12.2 |
HIP 37521 |
12.62 |
| 2026-02-19 12:00 |
07:42:19.79 |
+14:24:22.3 |
HIP 37521 |
12.52 |
| 2026-02-20 00:00 |
07:42:16.75 |
+14:24:32.3 |
HIP 37521 |
12.47 |
| 2026-02-20 12:00 |
07:42:13.73 |
+14:24:42.4 |
HIP 37521 |
12.46 |
| 2026-02-21 00:00 |
07:42:10.73 |
+14:24:52.4 |
HIP 37521 |
12.49 |
| 2026-02-21 12:00 |
07:42:07.76 |
+14:25:02.4 |
HIP 37521 |
12.58 |
| 2026-02-22 00:00 |
07:42:04.81 |
+14:25:12.4 |
HIP 37521 |
12.70 |
| 2026-02-22 12:00 |
07:42:01.88 |
+14:25:22.4 |
HIP 37521 |
12.87 |
| 2026-02-23 00:00 |
07:41:58.98 |
+14:25:32.3 |
HIP 37521 |
13.07 |
| 2026-02-23 12:00 |
07:41:56.10 |
+14:25:42.3 |
HIP 37521 |
13.30 |
| 2026-02-24 00:00 |
07:41:53.25 |
+14:25:52.2 |
HIP 37521 |
13.57 |