メタデータ
| 項目 |
値 |
| Designation |
C/2003 W1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-11-09T11:06:46.327680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:35Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
16.400 |
| 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) |
2003-12-06.0000000 |
| e |
0.93434870 |
| q (au) |
1.652421 |
| a (au) |
25.169668 |
| i (deg) |
78.075971 |
| Ω (om, deg) |
256.742634 |
| ω (w, deg) |
113.288697 |
| M (ma, deg) |
0.207128 |
等級
散乱 + 全体線形
$$
M_a = (15.601 + 4.976\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.601 |
| n |
4.976 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
08:23:30.55 |
-68:01:27.5 |
HIP 40769 |
27.36 |
| 2026-05-12 12:00 |
08:23:33.51 |
-68:00:40.5 |
HIP 40769 |
27.24 |
| 2026-05-13 00:00 |
08:23:36.53 |
-67:59:53.6 |
HIP 40769 |
27.15 |
| 2026-05-13 12:00 |
08:23:39.62 |
-67:59:06.8 |
HIP 40769 |
27.10 |
| 2026-05-14 00:00 |
08:23:42.78 |
-67:58:20.2 |
HIP 40769 |
27.08 |
| 2026-05-14 12:00 |
08:23:46.01 |
-67:57:33.7 |
HIP 40769 |
27.09 |
| 2026-05-15 00:00 |
08:23:49.30 |
-67:56:47.4 |
HIP 40769 |
27.14 |
| 2026-05-15 12:00 |
08:23:52.66 |
-67:56:01.2 |
HIP 40769 |
27.21 |
| 2026-05-16 00:00 |
08:23:56.09 |
-67:55:15.2 |
HIP 40769 |
27.32 |
| 2026-05-16 12:00 |
08:23:59.59 |
-67:54:29.4 |
HIP 40769 |
27.46 |
| 2026-05-17 00:00 |
08:24:03.15 |
-67:53:43.7 |
HIP 40769 |
27.63 |
| 2026-05-17 12:00 |
08:24:06.78 |
-67:52:58.2 |
HIP 40769 |
27.84 |
| 2026-05-18 00:00 |
08:24:10.47 |
-67:52:12.9 |
HIP 40769 |
28.07 |
| 2026-05-18 12:00 |
08:24:14.22 |
-67:51:27.7 |
HIP 40769 |
28.33 |
| 2026-05-19 00:00 |
08:24:18.05 |
-67:50:42.7 |
HIP 40769 |
28.62 |
| 2026-05-19 12:00 |
08:24:21.93 |
-67:49:57.9 |
HIP 40769 |
28.94 |
| 2026-05-20 00:00 |
08:24:25.88 |
-67:49:13.3 |
HIP 40769 |
29.28 |
| 2026-05-20 12:00 |
08:24:29.90 |
-67:48:28.9 |
HIP 40769 |
29.65 |
| 2026-05-21 00:00 |
08:24:33.97 |
-67:47:44.7 |
HIP 40769 |
30.05 |
| 2026-05-21 12:00 |
08:24:38.11 |
-67:47:00.7 |
HIP 40769 |
30.47 |
| 2026-05-22 00:00 |
08:24:42.31 |
-67:46:16.9 |
HIP 40991 |
30.67 |
| 2026-05-22 12:00 |
08:24:46.57 |
-67:45:33.2 |
HIP 40991 |
30.27 |
| 2026-05-23 00:00 |
08:24:50.89 |
-67:44:49.8 |
HIP 40991 |
29.90 |
| 2026-05-23 12:00 |
08:24:55.28 |
-67:44:06.6 |
HIP 40991 |
29.55 |
| 2026-05-24 00:00 |
08:24:59.72 |
-67:43:23.6 |
HIP 40991 |
29.22 |
| 2026-05-24 12:00 |
08:25:04.22 |
-67:42:40.8 |
HIP 40991 |
28.93 |
| 2026-05-25 00:00 |
08:25:08.79 |
-67:41:58.2 |
HIP 41301 |
28.58 |
| 2026-05-25 12:00 |
08:25:13.41 |
-67:41:15.9 |
HIP 41301 |
27.84 |
| 2026-05-26 00:00 |
08:25:18.09 |
-67:40:33.8 |
HIP 41301 |
27.11 |
| 2026-05-26 12:00 |
08:25:22.83 |
-67:39:51.8 |
HIP 41301 |
26.39 |
| 2026-05-27 00:00 |
08:25:27.63 |
-67:39:10.2 |
HIP 41301 |
25.67 |
| 2026-05-27 12:00 |
08:25:32.48 |
-67:38:28.7 |
HIP 41301 |
24.97 |
| 2026-05-28 00:00 |
08:25:37.39 |
-67:37:47.5 |
HIP 41301 |
24.28 |
| 2026-05-28 12:00 |
08:25:42.36 |
-67:37:06.5 |
HIP 41301 |
23.61 |
| 2026-05-29 00:00 |
08:25:47.38 |
-67:36:25.7 |
HIP 41301 |
22.95 |
| 2026-05-29 12:00 |
08:25:52.46 |
-67:35:45.2 |
HIP 41301 |
22.30 |
| 2026-05-30 00:00 |
08:25:57.60 |
-67:35:04.9 |
HIP 41301 |
21.67 |
| 2026-05-30 12:00 |
08:26:02.79 |
-67:34:24.9 |
HIP 41301 |
21.06 |
| 2026-05-31 00:00 |
08:26:08.03 |
-67:33:45.1 |
HIP 41301 |
20.47 |
| 2026-05-31 12:00 |
08:26:13.33 |
-67:33:05.5 |
HIP 41301 |
19.91 |
| 2026-06-01 00:00 |
08:26:18.68 |
-67:32:26.2 |
HIP 41301 |
19.37 |
| 2026-06-01 12:00 |
08:26:24.09 |
-67:31:47.2 |
HIP 41301 |
18.85 |
| 2026-06-02 00:00 |
08:26:29.55 |
-67:31:08.4 |
HIP 41301 |
18.37 |