メタデータ
| 項目 |
値 |
| Designation |
C/2003 WT42 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-04-10T18:20:21.065280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:36Z |
| Obs used |
2466 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
8.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-04-09.0000000 |
| e |
1.00258438 |
| q (au) |
5.190924 |
| a (au) |
-2008.572797 |
| i (deg) |
31.410588 |
| Ω (om, deg) |
48.453889 |
| ω (w, deg) |
92.466923 |
| M (ma, deg) |
-0.000019 |
等級
散乱 + 全体線形
$$
M_a = (-0.750 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-0.750 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
| 2003-12-01 |
2006-04-02 |
-4.0705 |
+3.107 |
| 2006-04-17 |
2007-07-07 |
+16.4914 |
-11.805 |
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 |
18:21:03.04 |
-46:19:54.3 |
HIP 89832 |
13.38 |
| 2026-03-26 12:00 |
18:21:03.44 |
-46:20:14.6 |
HIP 89832 |
13.59 |
| 2026-03-27 00:00 |
18:21:03.79 |
-46:20:34.8 |
HIP 89830 |
13.60 |
| 2026-03-27 12:00 |
18:21:04.11 |
-46:20:55.1 |
HIP 89830 |
13.50 |
| 2026-03-28 00:00 |
18:21:04.39 |
-46:21:15.4 |
HIP 89830 |
13.41 |
| 2026-03-28 12:00 |
18:21:04.63 |
-46:21:35.7 |
HIP 89830 |
13.32 |
| 2026-03-29 00:00 |
18:21:04.82 |
-46:21:56.0 |
HIP 89830 |
13.23 |
| 2026-03-29 12:00 |
18:21:04.98 |
-46:22:16.3 |
HIP 89830 |
13.15 |
| 2026-03-30 00:00 |
18:21:05.10 |
-46:22:36.6 |
HIP 89830 |
13.06 |
| 2026-03-30 12:00 |
18:21:05.18 |
-46:22:57.0 |
HIP 89830 |
12.98 |
| 2026-03-31 00:00 |
18:21:05.22 |
-46:23:17.3 |
HIP 89830 |
12.90 |
| 2026-03-31 12:00 |
18:21:05.22 |
-46:23:37.7 |
HIP 89830 |
12.82 |
| 2026-04-01 00:00 |
18:21:05.17 |
-46:23:58.0 |
HIP 89830 |
12.74 |
| 2026-04-01 12:00 |
18:21:05.09 |
-46:24:18.4 |
HIP 89830 |
12.66 |
| 2026-04-02 00:00 |
18:21:04.97 |
-46:24:38.8 |
HIP 89830 |
12.59 |
| 2026-04-02 12:00 |
18:21:04.81 |
-46:24:59.1 |
HIP 89830 |
12.52 |
| 2026-04-03 00:00 |
18:21:04.61 |
-46:25:19.5 |
HIP 89830 |
12.45 |
| 2026-04-03 12:00 |
18:21:04.37 |
-46:25:39.8 |
HIP 89830 |
12.38 |
| 2026-04-04 00:00 |
18:21:04.09 |
-46:26:00.2 |
HIP 89830 |
12.31 |
| 2026-04-04 12:00 |
18:21:03.77 |
-46:26:20.6 |
HIP 89830 |
12.25 |
| 2026-04-05 00:00 |
18:21:03.42 |
-46:26:40.9 |
HIP 89830 |
12.19 |
| 2026-04-05 12:00 |
18:21:03.02 |
-46:27:01.2 |
HIP 89830 |
12.13 |
| 2026-04-06 00:00 |
18:21:02.58 |
-46:27:21.6 |
HIP 89830 |
12.08 |
| 2026-04-06 12:00 |
18:21:02.10 |
-46:27:41.9 |
HIP 89830 |
12.02 |
| 2026-04-07 00:00 |
18:21:01.58 |
-46:28:02.2 |
HIP 89830 |
11.98 |
| 2026-04-07 12:00 |
18:21:01.03 |
-46:28:22.5 |
HIP 89830 |
11.93 |
| 2026-04-08 00:00 |
18:21:00.43 |
-46:28:42.8 |
HIP 89830 |
11.89 |
| 2026-04-08 12:00 |
18:20:59.80 |
-46:29:03.0 |
HIP 89830 |
11.85 |
| 2026-04-09 00:00 |
18:20:59.12 |
-46:29:23.3 |
HIP 89830 |
11.81 |
| 2026-04-09 12:00 |
18:20:58.41 |
-46:29:43.5 |
HIP 89830 |
11.78 |
| 2026-04-10 00:00 |
18:20:57.65 |
-46:30:03.7 |
HIP 89830 |
11.76 |
| 2026-04-10 12:00 |
18:20:56.86 |
-46:30:23.9 |
HIP 89830 |
11.74 |
| 2026-04-11 00:00 |
18:20:56.03 |
-46:30:44.0 |
HIP 89830 |
11.72 |
| 2026-04-11 12:00 |
18:20:55.16 |
-46:31:04.2 |
HIP 89830 |
11.71 |
| 2026-04-12 00:00 |
18:20:54.25 |
-46:31:24.3 |
HIP 89830 |
11.70 |
| 2026-04-12 12:00 |
18:20:53.30 |
-46:31:44.3 |
HIP 89830 |
11.70 |
| 2026-04-13 00:00 |
18:20:52.31 |
-46:32:04.4 |
HIP 89830 |
11.70 |
| 2026-04-13 12:00 |
18:20:51.28 |
-46:32:24.4 |
HIP 89830 |
11.72 |
| 2026-04-14 00:00 |
18:20:50.22 |
-46:32:44.4 |
HIP 89830 |
11.73 |
| 2026-04-14 12:00 |
18:20:49.11 |
-46:33:04.3 |
HIP 89830 |
11.76 |
| 2026-04-15 00:00 |
18:20:47.97 |
-46:33:24.3 |
HIP 89830 |
11.79 |
| 2026-04-15 12:00 |
18:20:46.79 |
-46:33:44.1 |
HIP 89830 |
11.82 |
| 2026-04-16 00:00 |
18:20:45.57 |
-46:34:04.0 |
HIP 89830 |
11.87 |