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) |
| 2026-05-12 00:00 |
18:18:52.99 |
-46:49:45.9 |
HIP 89863 |
14.96 |
| 2026-05-12 12:00 |
18:18:49.97 |
-46:50:01.7 |
HIP 89863 |
15.41 |
| 2026-05-13 00:00 |
18:18:46.92 |
-46:50:17.3 |
HIP 89863 |
15.87 |
| 2026-05-13 12:00 |
18:18:43.84 |
-46:50:32.8 |
HIP 89863 |
16.34 |
| 2026-05-14 00:00 |
18:18:40.73 |
-46:50:48.2 |
HIP 89863 |
16.83 |
| 2026-05-14 12:00 |
18:18:37.60 |
-46:51:03.5 |
HIP 89863 |
17.32 |
| 2026-05-15 00:00 |
18:18:34.43 |
-46:51:18.6 |
HIP 89863 |
17.83 |
| 2026-05-15 12:00 |
18:18:31.24 |
-46:51:33.7 |
HIP 89863 |
18.35 |
| 2026-05-16 00:00 |
18:18:28.03 |
-46:51:48.6 |
HIP 89863 |
18.88 |
| 2026-05-16 12:00 |
18:18:24.79 |
-46:52:03.4 |
HIP 89863 |
19.42 |
| 2026-05-17 00:00 |
18:18:21.52 |
-46:52:18.1 |
HIP 89578 |
19.29 |
| 2026-05-17 12:00 |
18:18:18.22 |
-46:52:32.6 |
HIP 89578 |
18.68 |
| 2026-05-18 00:00 |
18:18:14.90 |
-46:52:47.0 |
HIP 89578 |
18.07 |
| 2026-05-18 12:00 |
18:18:11.55 |
-46:53:01.3 |
HIP 89578 |
17.46 |
| 2026-05-19 00:00 |
18:18:08.18 |
-46:53:15.5 |
HIP 89578 |
16.85 |
| 2026-05-19 12:00 |
18:18:04.78 |
-46:53:29.5 |
HIP 89578 |
16.24 |
| 2026-05-20 00:00 |
18:18:01.36 |
-46:53:43.4 |
HIP 89578 |
15.62 |
| 2026-05-20 12:00 |
18:17:57.92 |
-46:53:57.2 |
HIP 89578 |
15.01 |
| 2026-05-21 00:00 |
18:17:54.45 |
-46:54:10.8 |
HIP 89578 |
14.39 |
| 2026-05-21 12:00 |
18:17:50.95 |
-46:54:24.3 |
HIP 89578 |
13.77 |
| 2026-05-22 00:00 |
18:17:47.44 |
-46:54:37.7 |
HIP 89578 |
13.15 |
| 2026-05-22 12:00 |
18:17:43.90 |
-46:54:50.9 |
HIP 89578 |
12.54 |
| 2026-05-23 00:00 |
18:17:40.34 |
-46:55:04.0 |
HIP 89578 |
11.92 |
| 2026-05-23 12:00 |
18:17:36.75 |
-46:55:17.0 |
HIP 89578 |
11.31 |
| 2026-05-24 00:00 |
18:17:33.15 |
-46:55:29.8 |
HIP 89578 |
10.70 |
| 2026-05-24 12:00 |
18:17:29.52 |
-46:55:42.5 |
HIP 89578 |
10.09 |
| 2026-05-25 00:00 |
18:17:25.87 |
-46:55:55.0 |
HIP 89578 |
9.49 |
| 2026-05-25 12:00 |
18:17:22.20 |
-46:56:07.4 |
HIP 89578 |
8.89 |
| 2026-05-26 00:00 |
18:17:18.51 |
-46:56:19.7 |
HIP 89578 |
8.31 |
| 2026-05-26 12:00 |
18:17:14.80 |
-46:56:31.8 |
HIP 89578 |
7.73 |
| 2026-05-27 00:00 |
18:17:11.07 |
-46:56:43.8 |
HIP 89578 |
7.17 |
| 2026-05-27 12:00 |
18:17:07.32 |
-46:56:55.6 |
HIP 89578 |
6.64 |
| 2026-05-28 00:00 |
18:17:03.55 |
-46:57:07.3 |
HIP 89578 |
6.12 |
| 2026-05-28 12:00 |
18:16:59.76 |
-46:57:18.8 |
HIP 89578 |
5.64 |
| 2026-05-29 00:00 |
18:16:55.95 |
-46:57:30.2 |
HIP 89578 |
5.21 |
| 2026-05-29 12:00 |
18:16:52.12 |
-46:57:41.4 |
HIP 89578 |
4.84 |
| 2026-05-30 00:00 |
18:16:48.28 |
-46:57:52.5 |
HIP 89578 |
4.53 |
| 2026-05-30 12:00 |
18:16:44.41 |
-46:58:03.4 |
HIP 89578 |
4.32 |
| 2026-05-31 00:00 |
18:16:40.53 |
-46:58:14.2 |
HIP 89578 |
4.21 |
| 2026-05-31 12:00 |
18:16:36.64 |
-46:58:24.8 |
HIP 89578 |
4.22 |
| 2026-06-01 00:00 |
18:16:32.72 |
-46:58:35.3 |
HIP 89578 |
4.34 |
| 2026-06-01 12:00 |
18:16:28.79 |
-46:58:45.7 |
HIP 89578 |
4.56 |
| 2026-06-02 00:00 |
18:16:24.84 |
-46:58:55.8 |
HIP 89578 |
4.88 |