C/2006 Q1 (McNaught)
メタデータ
| 項目 |
値 |
| Designation |
C/2006 Q1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-07-03T20:33:15.033600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:00Z |
| Obs used |
2710 |
| NEO |
- |
| M1 |
9.300 |
| K1 |
4.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-02-17.0000000 |
| e |
0.99960042 |
| q (au) |
2.763713 |
| a (au) |
6916.474116 |
| i (deg) |
59.050363 |
| Ω (om, deg) |
199.547074 |
| ω (w, deg) |
344.381853 |
| M (ma, deg) |
0.000391 |
等級
散乱 + 全体線形
$$
M_a = (10.201 + 2.340\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.201 |
| n |
2.340 |
| gf |
0.997 |
| gb |
-0.653 |
| k |
0.896 |
| δ90 |
7.537 |
| 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 |
| 2006-08-20 |
2008-01-29 |
+0.9241 |
-1.217 |
| 2008-01-29 |
2008-07-01 |
-6.8229 |
+2.130 |
| 2008-07-03 |
2009-07-06 |
+2.3187 |
-1.474 |
| 2009-07-06 |
2010-10-17 |
+3.1753 |
-2.381 |
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 |
22:11:51.62 |
+30:52:40.5 |
HIP 109454 |
18.20 |
| 2026-02-03 12:00 |
22:11:55.33 |
+30:52:42.1 |
HIP 109454 |
18.99 |
| 2026-02-04 00:00 |
22:11:59.04 |
+30:52:44.1 |
HIP 109454 |
19.77 |
| 2026-02-04 12:00 |
22:12:02.77 |
+30:52:46.3 |
HIP 109454 |
20.56 |
| 2026-02-05 00:00 |
22:12:06.50 |
+30:52:48.9 |
HIP 109454 |
21.36 |
| 2026-02-05 12:00 |
22:12:10.24 |
+30:52:51.8 |
HIP 109454 |
22.15 |
| 2026-02-06 00:00 |
22:12:13.98 |
+30:52:54.9 |
HIP 109454 |
22.95 |
| 2026-02-06 12:00 |
22:12:17.73 |
+30:52:58.4 |
HIP 109454 |
23.75 |
| 2026-02-07 00:00 |
22:12:21.49 |
+30:53:02.2 |
HIP 109454 |
24.56 |
| 2026-02-07 12:00 |
22:12:25.26 |
+30:53:06.3 |
HIP 109454 |
25.37 |
| 2026-02-08 00:00 |
22:12:29.03 |
+30:53:10.6 |
HIP 109454 |
26.18 |
| 2026-02-08 12:00 |
22:12:32.80 |
+30:53:15.3 |
HIP 109454 |
26.99 |
| 2026-02-09 00:00 |
22:12:36.59 |
+30:53:20.3 |
HIP 109454 |
27.80 |
| 2026-02-09 12:00 |
22:12:40.37 |
+30:53:25.6 |
HIP 109454 |
28.62 |
| 2026-02-10 00:00 |
22:12:44.17 |
+30:53:31.1 |
HIP 109454 |
29.43 |
| 2026-02-10 12:00 |
22:12:47.96 |
+30:53:37.0 |
HIP 109710 |
30.22 |
| 2026-02-11 00:00 |
22:12:51.77 |
+30:53:43.2 |
HIP 109710 |
29.93 |
| 2026-02-11 12:00 |
22:12:55.57 |
+30:53:49.6 |
HIP 109710 |
29.66 |
| 2026-02-12 00:00 |
22:12:59.38 |
+30:53:56.4 |
HIP 109710 |
29.40 |
| 2026-02-12 12:00 |
22:13:03.20 |
+30:54:03.4 |
HIP 109710 |
29.16 |
| 2026-02-13 00:00 |
22:13:07.01 |
+30:54:10.8 |
HIP 109710 |
28.94 |
| 2026-02-13 12:00 |
22:13:10.83 |
+30:54:18.4 |
HIP 109888 |
28.24 |
| 2026-02-14 00:00 |
22:13:14.66 |
+30:54:26.4 |
HIP 109888 |
27.41 |
| 2026-02-14 12:00 |
22:13:18.48 |
+30:54:34.6 |
HIP 109888 |
26.57 |
| 2026-02-15 00:00 |
22:13:22.31 |
+30:54:43.1 |
HIP 109888 |
25.74 |
| 2026-02-15 12:00 |
22:13:26.14 |
+30:54:52.0 |
HIP 109888 |
24.91 |
| 2026-02-16 00:00 |
22:13:29.98 |
+30:55:01.1 |
HIP 109888 |
24.07 |
| 2026-02-16 12:00 |
22:13:33.81 |
+30:55:10.5 |
HIP 109888 |
23.24 |
| 2026-02-17 00:00 |
22:13:37.65 |
+30:55:20.1 |
HIP 109888 |
22.40 |
| 2026-02-17 12:00 |
22:13:41.49 |
+30:55:30.1 |
HIP 109888 |
21.56 |
| 2026-02-18 00:00 |
22:13:45.32 |
+30:55:40.4 |
HIP 109888 |
20.72 |
| 2026-02-18 12:00 |
22:13:49.16 |
+30:55:50.9 |
HIP 109888 |
19.88 |
| 2026-02-19 00:00 |
22:13:53.00 |
+30:56:01.7 |
HIP 109888 |
19.04 |
| 2026-02-19 12:00 |
22:13:56.84 |
+30:56:12.8 |
HIP 109888 |
18.20 |
| 2026-02-20 00:00 |
22:14:00.68 |
+30:56:24.2 |
HIP 109888 |
17.36 |
| 2026-02-20 12:00 |
22:14:04.52 |
+30:56:35.9 |
HIP 109888 |
16.52 |
| 2026-02-21 00:00 |
22:14:08.36 |
+30:56:47.8 |
HIP 109888 |
15.68 |
| 2026-02-21 12:00 |
22:14:12.20 |
+30:57:00.1 |
HIP 109888 |
14.85 |
| 2026-02-22 00:00 |
22:14:16.03 |
+30:57:12.6 |
HIP 109888 |
14.01 |
| 2026-02-22 12:00 |
22:14:19.87 |
+30:57:25.4 |
HIP 109888 |
13.17 |
| 2026-02-23 00:00 |
22:14:23.70 |
+30:57:38.4 |
HIP 109888 |
12.34 |
| 2026-02-23 12:00 |
22:14:27.53 |
+30:57:51.7 |
HIP 109888 |
11.50 |
| 2026-02-24 00:00 |
22:14:31.36 |
+30:58:05.3 |
HIP 109888 |
10.68 |