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
$$
M_a = (10.125 + 2.335\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.125 |
| n |
2.335 |
| gf |
0.943 |
| gb |
-0.656 |
| k |
0.906 |
| δ90 |
6.533 |
| 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 |
+0.9412 |
-1.227 |
| 2008-01-29 |
2008-07-01 |
-6.8432 |
+2.139 |
| 2008-07-03 |
2009-07-06 |
+2.3103 |
-1.470 |
| 2009-07-06 |
2010-10-17 |
+3.1514 |
-2.364 |
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) |
| 2026-09-20 00:00 |
22:12:44.01 |
+32:41:34.3 |
HIP 109437 |
39.38 |
| 2026-09-20 12:00 |
22:12:40.97 |
+32:41:06.1 |
HIP 109437 |
38.59 |
| 2026-09-21 00:00 |
22:12:37.94 |
+32:40:37.7 |
HIP 109437 |
37.80 |
| 2026-09-21 12:00 |
22:12:34.93 |
+32:40:09.1 |
HIP 109437 |
37.00 |
| 2026-09-22 00:00 |
22:12:31.94 |
+32:39:40.3 |
HIP 109437 |
36.21 |
| 2026-09-22 12:00 |
22:12:28.96 |
+32:39:11.3 |
HIP 109437 |
35.42 |
| 2026-09-23 00:00 |
22:12:25.99 |
+32:38:42.1 |
HIP 109437 |
34.63 |
| 2026-09-23 12:00 |
22:12:23.04 |
+32:38:12.7 |
HIP 109437 |
33.84 |
| 2026-09-24 00:00 |
22:12:20.11 |
+32:37:43.1 |
HIP 109437 |
33.05 |
| 2026-09-24 12:00 |
22:12:17.20 |
+32:37:13.3 |
HIP 109437 |
32.26 |
| 2026-09-25 00:00 |
22:12:14.30 |
+32:36:43.2 |
HIP 109437 |
31.47 |
| 2026-09-25 12:00 |
22:12:11.42 |
+32:36:13.0 |
HIP 109437 |
30.68 |
| 2026-09-26 00:00 |
22:12:08.56 |
+32:35:42.6 |
HIP 109437 |
29.89 |
| 2026-09-26 12:00 |
22:12:05.71 |
+32:35:12.0 |
HIP 109437 |
29.11 |
| 2026-09-27 00:00 |
22:12:02.88 |
+32:34:41.2 |
HIP 109437 |
28.32 |
| 2026-09-27 12:00 |
22:12:00.07 |
+32:34:10.3 |
HIP 109437 |
27.54 |
| 2026-09-28 00:00 |
22:11:57.28 |
+32:33:39.1 |
HIP 109437 |
26.75 |
| 2026-09-28 12:00 |
22:11:54.51 |
+32:33:07.8 |
HIP 109437 |
25.97 |
| 2026-09-29 00:00 |
22:11:51.75 |
+32:32:36.2 |
HIP 109437 |
25.19 |
| 2026-09-29 12:00 |
22:11:49.02 |
+32:32:04.5 |
HIP 109437 |
24.41 |
| 2026-09-30 00:00 |
22:11:46.30 |
+32:31:32.7 |
HIP 109437 |
23.64 |
| 2026-09-30 12:00 |
22:11:43.60 |
+32:31:00.6 |
HIP 109437 |
22.86 |
| 2026-10-01 00:00 |
22:11:40.93 |
+32:30:28.4 |
HIP 109437 |
22.09 |
| 2026-10-01 12:00 |
22:11:38.27 |
+32:29:56.0 |
HIP 109437 |
21.32 |
| 2026-10-02 00:00 |
22:11:35.63 |
+32:29:23.5 |
HIP 109437 |
20.55 |
| 2026-10-02 12:00 |
22:11:33.01 |
+32:28:50.8 |
HIP 109437 |
19.78 |
| 2026-10-03 00:00 |
22:11:30.41 |
+32:28:17.9 |
HIP 109437 |
19.02 |
| 2026-10-03 12:00 |
22:11:27.84 |
+32:27:44.8 |
HIP 109437 |
18.25 |
| 2026-10-04 00:00 |
22:11:25.28 |
+32:27:11.6 |
HIP 109437 |
17.50 |
| 2026-10-04 12:00 |
22:11:22.75 |
+32:26:38.3 |
HIP 109437 |
16.74 |
| 2026-10-05 00:00 |
22:11:20.24 |
+32:26:04.8 |
HIP 109437 |
15.99 |
| 2026-10-05 12:00 |
22:11:17.75 |
+32:25:31.1 |
HIP 109437 |
15.25 |
| 2026-10-06 00:00 |
22:11:15.28 |
+32:24:57.3 |
HIP 109437 |
14.50 |
| 2026-10-06 12:00 |
22:11:12.83 |
+32:24:23.4 |
HIP 109437 |
13.77 |
| 2026-10-07 00:00 |
22:11:10.40 |
+32:23:49.3 |
HIP 109437 |
13.04 |
| 2026-10-07 12:00 |
22:11:08.00 |
+32:23:15.1 |
HIP 109437 |
12.32 |
| 2026-10-08 00:00 |
22:11:05.62 |
+32:22:40.7 |
HIP 109437 |
11.60 |
| 2026-10-08 12:00 |
22:11:03.27 |
+32:22:06.2 |
HIP 109437 |
10.90 |
| 2026-10-09 00:00 |
22:11:00.93 |
+32:21:31.6 |
HIP 109437 |
10.21 |
| 2026-10-09 12:00 |
22:10:58.62 |
+32:20:56.9 |
HIP 109437 |
9.53 |
| 2026-10-10 00:00 |
22:10:56.34 |
+32:20:22.0 |
HIP 109437 |
8.87 |
| 2026-10-10 12:00 |
22:10:54.08 |
+32:19:47.0 |
HIP 109437 |
8.23 |
| 2026-10-11 00:00 |
22:10:51.84 |
+32:19:11.9 |
HIP 109437 |
7.61 |