C/2008 Q1 (Maticic)
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
$$
M_a = (12.534 + 4.164\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.534 |
| n |
4.164 |
| 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 |
-13.0423 |
+6.429 |
| 2009-08-14 |
2010-04-10 |
+9.1031 |
-6.361 |
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 |
07:57:37.26 |
-38:28:53.3 |
HIP 38727 |
23.95 |
| 2026-02-03 12:00 |
07:57:32.69 |
-38:28:35.8 |
HIP 38727 |
23.02 |
| 2026-02-04 00:00 |
07:57:28.14 |
-38:28:17.9 |
HIP 38727 |
22.08 |
| 2026-02-04 12:00 |
07:57:23.59 |
-38:27:59.7 |
HIP 38727 |
21.14 |
| 2026-02-05 00:00 |
07:57:19.06 |
-38:27:41.1 |
HIP 38727 |
20.20 |
| 2026-02-05 12:00 |
07:57:14.55 |
-38:27:22.1 |
HIP 38727 |
19.26 |
| 2026-02-06 00:00 |
07:57:10.04 |
-38:27:02.7 |
HIP 38727 |
18.32 |
| 2026-02-06 12:00 |
07:57:05.55 |
-38:26:43.0 |
HIP 38727 |
17.38 |
| 2026-02-07 00:00 |
07:57:01.08 |
-38:26:22.9 |
HIP 38727 |
16.45 |
| 2026-02-07 12:00 |
07:56:56.62 |
-38:26:02.4 |
HIP 38727 |
15.51 |
| 2026-02-08 00:00 |
07:56:52.17 |
-38:25:41.6 |
HIP 38727 |
14.57 |
| 2026-02-08 12:00 |
07:56:47.74 |
-38:25:20.4 |
HIP 38727 |
13.63 |
| 2026-02-09 00:00 |
07:56:43.33 |
-38:24:58.8 |
HIP 38727 |
12.70 |
| 2026-02-09 12:00 |
07:56:38.93 |
-38:24:36.9 |
HIP 38727 |
11.76 |
| 2026-02-10 00:00 |
07:56:34.55 |
-38:24:14.7 |
HIP 38727 |
10.83 |
| 2026-02-10 12:00 |
07:56:30.19 |
-38:23:52.0 |
HIP 38727 |
9.89 |
| 2026-02-11 00:00 |
07:56:25.84 |
-38:23:29.1 |
HIP 38727 |
8.96 |
| 2026-02-11 12:00 |
07:56:21.51 |
-38:23:05.8 |
HIP 38727 |
8.03 |
| 2026-02-12 00:00 |
07:56:17.20 |
-38:22:42.1 |
HIP 38727 |
7.10 |
| 2026-02-12 12:00 |
07:56:12.90 |
-38:22:18.1 |
HIP 38727 |
6.17 |
| 2026-02-13 00:00 |
07:56:08.63 |
-38:21:53.7 |
HIP 38727 |
5.25 |
| 2026-02-13 12:00 |
07:56:04.37 |
-38:21:29.1 |
HIP 38727 |
4.33 |
| 2026-02-14 00:00 |
07:56:00.13 |
-38:21:04.0 |
HIP 38727 |
3.41 |
| 2026-02-14 12:00 |
07:55:55.92 |
-38:20:38.7 |
HIP 38727 |
2.51 |
| 2026-02-15 00:00 |
07:55:51.72 |
-38:20:13.0 |
HIP 38727 |
1.65 |
| 2026-02-15 12:00 |
07:55:47.54 |
-38:19:46.9 |
HIP 38727 |
0.93 |
| 2026-02-16 00:00 |
07:55:43.38 |
-38:19:20.6 |
HIP 38727 |
0.86 |
| 2026-02-16 12:00 |
07:55:39.25 |
-38:18:53.9 |
HIP 38727 |
1.53 |
| 2026-02-17 00:00 |
07:55:35.13 |
-38:18:26.9 |
HIP 38727 |
2.38 |
| 2026-02-17 12:00 |
07:55:31.04 |
-38:17:59.5 |
HIP 38727 |
3.27 |
| 2026-02-18 00:00 |
07:55:26.97 |
-38:17:31.9 |
HIP 38727 |
4.17 |
| 2026-02-18 12:00 |
07:55:22.92 |
-38:17:03.9 |
HIP 38727 |
5.08 |
| 2026-02-19 00:00 |
07:55:18.89 |
-38:16:35.6 |
HIP 38727 |
6.00 |
| 2026-02-19 12:00 |
07:55:14.89 |
-38:16:07.0 |
HIP 38727 |
6.91 |
| 2026-02-20 00:00 |
07:55:10.91 |
-38:15:38.1 |
HIP 38727 |
7.83 |
| 2026-02-20 12:00 |
07:55:06.95 |
-38:15:08.9 |
HIP 38727 |
8.74 |
| 2026-02-21 00:00 |
07:55:03.02 |
-38:14:39.4 |
HIP 38727 |
9.66 |
| 2026-02-21 12:00 |
07:54:59.11 |
-38:14:09.6 |
HIP 38727 |
10.57 |
| 2026-02-22 00:00 |
07:54:55.22 |
-38:13:39.5 |
HIP 38727 |
11.48 |
| 2026-02-22 12:00 |
07:54:51.36 |
-38:13:09.2 |
HIP 38654 |
12.05 |
| 2026-02-23 00:00 |
07:54:47.52 |
-38:12:38.5 |
HIP 38654 |
12.60 |
| 2026-02-23 12:00 |
07:54:43.71 |
-38:12:07.5 |
HIP 38654 |
13.19 |
| 2026-02-24 00:00 |
07:54:39.93 |
-38:11:36.3 |
HIP 38654 |
13.82 |