メタデータ
| 項目 |
値 |
| Designation |
C/2008 Q1 (Maticic) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-12-30T03:12:23.523840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:22Z |
| Obs used |
1021 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-01-09.0000000 |
| e |
0.99501685 |
| q (au) |
2.959144 |
| a (au) |
593.829979 |
| i (deg) |
118.626625 |
| Ω (om, deg) |
9.307702 |
| ω (w, deg) |
104.480851 |
| M (ma, deg) |
0.000672 |
等級
散乱 + 全体線形
$$
M_a = (12.548 + 4.150\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.548 |
| n |
4.150 |
| gf |
1.000 |
| gb |
-0.820 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2009-01-12 |
2009-08-14 |
-13.1930 |
+6.500 |
| 2009-08-14 |
2010-04-10 |
+9.2086 |
-6.432 |
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 |
07:52:49.63 |
-36:07:43.1 |
HIP 38418 |
8.22 |
| 2026-06-01 12:00 |
07:52:52.15 |
-36:07:17.2 |
HIP 38418 |
8.48 |
| 2026-06-02 00:00 |
07:52:54.70 |
-36:06:51.5 |
HIP 38418 |
8.79 |
| 2026-06-02 12:00 |
07:52:57.27 |
-36:06:26.2 |
HIP 38418 |
9.14 |
| 2026-06-03 00:00 |
07:52:59.87 |
-36:06:01.1 |
HIP 38418 |
9.53 |
| 2026-06-03 12:00 |
07:53:02.48 |
-36:05:36.3 |
HIP 38418 |
9.96 |
| 2026-06-04 00:00 |
07:53:05.12 |
-36:05:11.8 |
HIP 38418 |
10.42 |
| 2026-06-04 12:00 |
07:53:07.78 |
-36:04:47.5 |
HIP 38418 |
10.91 |
| 2026-06-05 00:00 |
07:53:10.46 |
-36:04:23.6 |
HIP 38418 |
11.42 |
| 2026-06-05 12:00 |
07:53:13.17 |
-36:04:00.0 |
HIP 38418 |
11.95 |
| 2026-06-06 00:00 |
07:53:15.89 |
-36:03:36.6 |
HIP 38418 |
12.50 |
| 2026-06-06 12:00 |
07:53:18.64 |
-36:03:13.6 |
HIP 38418 |
13.06 |
| 2026-06-07 00:00 |
07:53:21.41 |
-36:02:50.8 |
HIP 38418 |
13.64 |
| 2026-06-07 12:00 |
07:53:24.20 |
-36:02:28.4 |
HIP 38593 |
13.66 |
| 2026-06-08 00:00 |
07:53:27.01 |
-36:02:06.2 |
HIP 38593 |
13.00 |
| 2026-06-08 12:00 |
07:53:29.84 |
-36:01:44.4 |
HIP 38593 |
12.34 |
| 2026-06-09 00:00 |
07:53:32.69 |
-36:01:22.9 |
HIP 38593 |
11.69 |
| 2026-06-09 12:00 |
07:53:35.56 |
-36:01:01.6 |
HIP 38593 |
11.04 |
| 2026-06-10 00:00 |
07:53:38.45 |
-36:00:40.7 |
HIP 38593 |
10.40 |
| 2026-06-10 12:00 |
07:53:41.36 |
-36:00:20.1 |
HIP 38593 |
9.76 |
| 2026-06-11 00:00 |
07:53:44.29 |
-35:59:59.8 |
HIP 38593 |
9.13 |
| 2026-06-11 12:00 |
07:53:47.23 |
-35:59:39.8 |
HIP 38593 |
8.52 |
| 2026-06-12 00:00 |
07:53:50.20 |
-35:59:20.1 |
HIP 38593 |
7.91 |
| 2026-06-12 12:00 |
07:53:53.19 |
-35:59:00.7 |
HIP 38593 |
7.32 |
| 2026-06-13 00:00 |
07:53:56.19 |
-35:58:41.6 |
HIP 38593 |
6.76 |
| 2026-06-13 12:00 |
07:53:59.21 |
-35:58:22.9 |
HIP 38593 |
6.22 |
| 2026-06-14 00:00 |
07:54:02.25 |
-35:58:04.5 |
HIP 38593 |
5.72 |
| 2026-06-14 12:00 |
07:54:05.31 |
-35:57:46.4 |
HIP 38593 |
5.26 |
| 2026-06-15 00:00 |
07:54:08.39 |
-35:57:28.6 |
HIP 38593 |
4.87 |
| 2026-06-15 12:00 |
07:54:11.48 |
-35:57:11.1 |
HIP 38593 |
4.55 |
| 2026-06-16 00:00 |
07:54:14.59 |
-35:56:54.0 |
HIP 38593 |
4.32 |
| 2026-06-16 12:00 |
07:54:17.72 |
-35:56:37.2 |
HIP 38593 |
4.21 |
| 2026-06-17 00:00 |
07:54:20.86 |
-35:56:20.7 |
HIP 38593 |
4.21 |
| 2026-06-17 12:00 |
07:54:24.02 |
-35:56:04.5 |
HIP 38593 |
4.33 |
| 2026-06-18 00:00 |
07:54:27.19 |
-35:55:48.7 |
HIP 38593 |
4.56 |
| 2026-06-18 12:00 |
07:54:30.38 |
-35:55:33.2 |
HIP 38593 |
4.89 |
| 2026-06-19 00:00 |
07:54:33.59 |
-35:55:18.0 |
HIP 38593 |
5.29 |
| 2026-06-19 12:00 |
07:54:36.81 |
-35:55:03.1 |
HIP 38593 |
5.76 |
| 2026-06-20 00:00 |
07:54:40.05 |
-35:54:48.6 |
HIP 38593 |
6.27 |
| 2026-06-20 12:00 |
07:54:43.30 |
-35:54:34.4 |
HIP 38593 |
6.82 |
| 2026-06-21 00:00 |
07:54:46.56 |
-35:54:20.5 |
HIP 38593 |
7.40 |
| 2026-06-21 12:00 |
07:54:49.84 |
-35:54:07.0 |
HIP 38593 |
8.00 |
| 2026-06-22 00:00 |
07:54:53.14 |
-35:53:53.8 |
HIP 38593 |
8.62 |