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) |
| 2026-03-26 00:00 |
07:51:47.24 |
-37:33:39.4 |
HIP 38365 |
5.50 |
| 2026-03-26 12:00 |
07:51:45.38 |
-37:32:56.8 |
HIP 38365 |
5.89 |
| 2026-03-27 00:00 |
07:51:43.56 |
-37:32:14.2 |
HIP 38365 |
6.37 |
| 2026-03-27 12:00 |
07:51:41.77 |
-37:31:31.5 |
HIP 38365 |
6.91 |
| 2026-03-28 00:00 |
07:51:40.02 |
-37:30:48.7 |
HIP 38365 |
7.49 |
| 2026-03-28 12:00 |
07:51:38.31 |
-37:30:05.8 |
HIP 38365 |
8.12 |
| 2026-03-29 00:00 |
07:51:36.63 |
-37:29:22.9 |
HIP 38365 |
8.77 |
| 2026-03-29 12:00 |
07:51:34.98 |
-37:28:39.9 |
HIP 38365 |
9.45 |
| 2026-03-30 00:00 |
07:51:33.38 |
-37:27:56.8 |
HIP 38365 |
10.14 |
| 2026-03-30 12:00 |
07:51:31.81 |
-37:27:13.7 |
HIP 38365 |
10.84 |
| 2026-03-31 00:00 |
07:51:30.27 |
-37:26:30.6 |
HIP 38365 |
11.56 |
| 2026-03-31 12:00 |
07:51:28.77 |
-37:25:47.4 |
HIP 38365 |
12.29 |
| 2026-04-01 00:00 |
07:51:27.31 |
-37:25:04.1 |
HIP 38365 |
13.02 |
| 2026-04-01 12:00 |
07:51:25.89 |
-37:24:20.8 |
HIP 38365 |
13.76 |
| 2026-04-02 00:00 |
07:51:24.50 |
-37:23:37.5 |
HIP 38365 |
14.50 |
| 2026-04-02 12:00 |
07:51:23.15 |
-37:22:54.2 |
HIP 38365 |
15.24 |
| 2026-04-03 00:00 |
07:51:21.83 |
-37:22:10.8 |
HIP 38365 |
15.99 |
| 2026-04-03 12:00 |
07:51:20.55 |
-37:21:27.3 |
HIP 38365 |
16.74 |
| 2026-04-04 00:00 |
07:51:19.31 |
-37:20:43.9 |
HIP 38365 |
17.49 |
| 2026-04-04 12:00 |
07:51:18.10 |
-37:20:00.4 |
HIP 38365 |
18.24 |
| 2026-04-05 00:00 |
07:51:16.93 |
-37:19:16.9 |
HIP 38365 |
18.99 |
| 2026-04-05 12:00 |
07:51:15.80 |
-37:18:33.4 |
HIP 38365 |
19.74 |
| 2026-04-06 00:00 |
07:51:14.70 |
-37:17:49.9 |
HIP 38365 |
20.49 |
| 2026-04-06 12:00 |
07:51:13.64 |
-37:17:06.4 |
HIP 38365 |
21.24 |
| 2026-04-07 00:00 |
07:51:12.61 |
-37:16:22.9 |
HIP 38365 |
21.98 |
| 2026-04-07 12:00 |
07:51:11.63 |
-37:15:39.3 |
HIP 38365 |
22.73 |
| 2026-04-08 00:00 |
07:51:10.68 |
-37:14:55.8 |
HIP 38365 |
23.48 |
| 2026-04-08 12:00 |
07:51:09.76 |
-37:14:12.3 |
HIP 38365 |
24.23 |
| 2026-04-09 00:00 |
07:51:08.88 |
-37:13:28.7 |
HIP 38365 |
24.97 |
| 2026-04-09 12:00 |
07:51:08.04 |
-37:12:45.2 |
HIP 38365 |
25.71 |
| 2026-04-10 00:00 |
07:51:07.24 |
-37:12:01.7 |
HIP 38365 |
26.45 |
| 2026-04-10 12:00 |
07:51:06.47 |
-37:11:18.3 |
HIP 38475 |
26.35 |
| 2026-04-11 00:00 |
07:51:05.74 |
-37:10:34.8 |
HIP 38475 |
26.01 |
| 2026-04-11 12:00 |
07:51:05.05 |
-37:09:51.4 |
HIP 38475 |
25.69 |
| 2026-04-12 00:00 |
07:51:04.39 |
-37:09:08.0 |
HIP 38475 |
25.38 |
| 2026-04-12 12:00 |
07:51:03.77 |
-37:08:24.6 |
HIP 38475 |
25.08 |
| 2026-04-13 00:00 |
07:51:03.19 |
-37:07:41.2 |
HIP 38475 |
24.80 |
| 2026-04-13 12:00 |
07:51:02.64 |
-37:06:57.9 |
HIP 38475 |
24.52 |
| 2026-04-14 00:00 |
07:51:02.13 |
-37:06:14.7 |
HIP 38475 |
24.26 |
| 2026-04-14 12:00 |
07:51:01.65 |
-37:05:31.4 |
HIP 38475 |
24.02 |
| 2026-04-15 00:00 |
07:51:01.22 |
-37:04:48.3 |
HIP 38475 |
23.78 |
| 2026-04-15 12:00 |
07:51:00.82 |
-37:04:05.1 |
HIP 38475 |
23.56 |
| 2026-04-16 00:00 |
07:51:00.45 |
-37:03:22.1 |
HIP 38475 |
23.35 |