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) |
| 2026-07-29 00:00 |
07:59:18.22 |
-35:53:16.1 |
HIP 39123 |
13.04 |
| 2026-07-29 12:00 |
07:59:21.85 |
-35:53:28.2 |
HIP 39123 |
12.30 |
| 2026-07-30 00:00 |
07:59:25.48 |
-35:53:40.7 |
HIP 39123 |
11.56 |
| 2026-07-30 12:00 |
07:59:29.10 |
-35:53:53.5 |
HIP 39123 |
10.82 |
| 2026-07-31 00:00 |
07:59:32.72 |
-35:54:06.7 |
HIP 39123 |
10.08 |
| 2026-07-31 12:00 |
07:59:36.33 |
-35:54:20.1 |
HIP 39123 |
9.34 |
| 2026-08-01 00:00 |
07:59:39.93 |
-35:54:33.9 |
HIP 39123 |
8.61 |
| 2026-08-01 12:00 |
07:59:43.53 |
-35:54:48.0 |
HIP 39123 |
7.88 |
| 2026-08-02 00:00 |
07:59:47.12 |
-35:55:02.4 |
HIP 39123 |
7.16 |
| 2026-08-02 12:00 |
07:59:50.71 |
-35:55:17.2 |
HIP 39123 |
6.44 |
| 2026-08-03 00:00 |
07:59:54.29 |
-35:55:32.3 |
HIP 39123 |
5.74 |
| 2026-08-03 12:00 |
07:59:57.86 |
-35:55:47.7 |
HIP 39123 |
5.05 |
| 2026-08-04 00:00 |
08:00:01.42 |
-35:56:03.4 |
HIP 39123 |
4.38 |
| 2026-08-04 12:00 |
08:00:04.98 |
-35:56:19.4 |
HIP 39123 |
3.74 |
| 2026-08-05 00:00 |
08:00:08.53 |
-35:56:35.7 |
HIP 39123 |
3.16 |
| 2026-08-05 12:00 |
08:00:12.07 |
-35:56:52.4 |
HIP 39123 |
2.68 |
| 2026-08-06 00:00 |
08:00:15.60 |
-35:57:09.4 |
HIP 39123 |
2.34 |
| 2026-08-06 12:00 |
08:00:19.12 |
-35:57:26.7 |
HIP 39123 |
2.22 |
| 2026-08-07 00:00 |
08:00:22.64 |
-35:57:44.3 |
HIP 39123 |
2.36 |
| 2026-08-07 12:00 |
08:00:26.14 |
-35:58:02.2 |
HIP 39123 |
2.71 |
| 2026-08-08 00:00 |
08:00:29.64 |
-35:58:20.5 |
HIP 39123 |
3.21 |
| 2026-08-08 12:00 |
08:00:33.12 |
-35:58:39.0 |
HIP 39123 |
3.80 |
| 2026-08-09 00:00 |
08:00:36.60 |
-35:58:57.9 |
HIP 39123 |
4.44 |
| 2026-08-09 12:00 |
08:00:40.07 |
-35:59:17.0 |
HIP 39123 |
5.11 |
| 2026-08-10 00:00 |
08:00:43.52 |
-35:59:36.5 |
HIP 39123 |
5.81 |
| 2026-08-10 12:00 |
08:00:46.97 |
-35:59:56.3 |
HIP 39123 |
6.52 |
| 2026-08-11 00:00 |
08:00:50.40 |
-36:00:16.4 |
HIP 39123 |
7.24 |
| 2026-08-11 12:00 |
08:00:53.83 |
-36:00:36.8 |
HIP 39123 |
7.97 |
| 2026-08-12 00:00 |
08:00:57.24 |
-36:00:57.5 |
HIP 39123 |
8.70 |
| 2026-08-12 12:00 |
08:01:00.64 |
-36:01:18.5 |
HIP 39123 |
9.44 |
| 2026-08-13 00:00 |
08:01:04.03 |
-36:01:39.8 |
HIP 39123 |
10.18 |
| 2026-08-13 12:00 |
08:01:07.40 |
-36:02:01.4 |
HIP 39123 |
10.93 |
| 2026-08-14 00:00 |
08:01:10.76 |
-36:02:23.3 |
HIP 39123 |
11.68 |
| 2026-08-14 12:00 |
08:01:14.11 |
-36:02:45.5 |
HIP 39123 |
12.43 |
| 2026-08-15 00:00 |
08:01:17.45 |
-36:03:08.0 |
HIP 39123 |
13.18 |
| 2026-08-15 12:00 |
08:01:20.77 |
-36:03:30.8 |
HIP 39123 |
13.93 |
| 2026-08-16 00:00 |
08:01:24.08 |
-36:03:53.9 |
HIP 39123 |
14.68 |
| 2026-08-16 12:00 |
08:01:27.38 |
-36:04:17.3 |
HIP 39123 |
15.43 |
| 2026-08-17 00:00 |
08:01:30.66 |
-36:04:40.9 |
HIP 39123 |
16.19 |
| 2026-08-17 12:00 |
08:01:33.93 |
-36:05:04.9 |
HIP 39123 |
16.94 |
| 2026-08-18 00:00 |
08:01:37.18 |
-36:05:29.1 |
HIP 39369 |
17.47 |
| 2026-08-18 12:00 |
08:01:40.42 |
-36:05:53.6 |
HIP 39369 |
16.70 |
| 2026-08-19 00:00 |
08:01:43.64 |
-36:06:18.4 |
HIP 39369 |
15.94 |