メタデータ
| 項目 |
値 |
| Designation |
C/2003 U1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-11-03T09:32:56.417280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:34Z |
| Obs used |
188 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2003-11-05.0000000 |
| e |
0.92158501 |
| q (au) |
1.795717 |
| a (au) |
22.900172 |
| i (deg) |
164.474530 |
| Ω (om, deg) |
322.763107 |
| ω (w, deg) |
278.383793 |
| M (ma, deg) |
0.014409 |
等級
散乱 + 全体線形
$$
M_a = (16.162 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.162 |
| n |
2.000 |
| gf |
0.993 |
| gb |
-1.000 |
| k |
0.990 |
| δ90 |
5.241 |
| 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) |
| 2026-06-01 00:00 |
15:54:43.83 |
-04:01:18.5 |
HIP 77899 |
15.93 |
| 2026-06-01 12:00 |
15:54:40.14 |
-04:01:09.6 |
HIP 77899 |
15.89 |
| 2026-06-02 00:00 |
15:54:36.45 |
-04:01:00.9 |
HIP 77899 |
15.90 |
| 2026-06-02 12:00 |
15:54:32.77 |
-04:00:52.3 |
HIP 77899 |
15.97 |
| 2026-06-03 00:00 |
15:54:29.10 |
-04:00:43.8 |
HIP 77899 |
16.09 |
| 2026-06-03 12:00 |
15:54:25.43 |
-04:00:35.5 |
HIP 77899 |
16.25 |
| 2026-06-04 00:00 |
15:54:21.77 |
-04:00:27.4 |
HIP 77899 |
16.47 |
| 2026-06-04 12:00 |
15:54:18.11 |
-04:00:19.4 |
HIP 77899 |
16.72 |
| 2026-06-05 00:00 |
15:54:14.47 |
-04:00:11.5 |
HIP 77899 |
17.03 |
| 2026-06-05 12:00 |
15:54:10.83 |
-04:00:03.8 |
HIP 77899 |
17.37 |
| 2026-06-06 00:00 |
15:54:07.20 |
-03:59:56.2 |
HIP 77899 |
17.75 |
| 2026-06-06 12:00 |
15:54:03.57 |
-03:59:48.8 |
HIP 77899 |
18.17 |
| 2026-06-07 00:00 |
15:53:59.96 |
-03:59:41.5 |
HIP 77899 |
18.62 |
| 2026-06-07 12:00 |
15:53:56.35 |
-03:59:34.3 |
HIP 77899 |
19.09 |
| 2026-06-08 00:00 |
15:53:52.75 |
-03:59:27.3 |
HIP 77899 |
19.60 |
| 2026-06-08 12:00 |
15:53:49.16 |
-03:59:20.5 |
HIP 77899 |
20.13 |
| 2026-06-09 00:00 |
15:53:45.58 |
-03:59:13.8 |
HIP 77899 |
20.68 |
| 2026-06-09 12:00 |
15:53:42.01 |
-03:59:07.3 |
HIP 77899 |
21.25 |
| 2026-06-10 00:00 |
15:53:38.45 |
-03:59:00.9 |
HIP 77899 |
21.85 |
| 2026-06-10 12:00 |
15:53:34.90 |
-03:58:54.7 |
HIP 77899 |
22.45 |
| 2026-06-11 00:00 |
15:53:31.36 |
-03:58:48.6 |
HIP 77899 |
23.08 |
| 2026-06-11 12:00 |
15:53:27.83 |
-03:58:42.6 |
HIP 77899 |
23.71 |
| 2026-06-12 00:00 |
15:53:24.31 |
-03:58:36.9 |
HIP 77899 |
24.36 |
| 2026-06-12 12:00 |
15:53:20.80 |
-03:58:31.2 |
HIP 77899 |
25.02 |
| 2026-06-13 00:00 |
15:53:17.31 |
-03:58:25.8 |
HIP 77899 |
25.69 |
| 2026-06-13 12:00 |
15:53:13.82 |
-03:58:20.4 |
HIP 77899 |
26.36 |
| 2026-06-14 00:00 |
15:53:10.35 |
-03:58:15.3 |
HIP 77899 |
27.05 |
| 2026-06-14 12:00 |
15:53:06.89 |
-03:58:10.3 |
HIP 77899 |
27.74 |
| 2026-06-15 00:00 |
15:53:03.44 |
-03:58:05.4 |
HIP 77899 |
28.43 |
| 2026-06-15 12:00 |
15:53:00.01 |
-03:58:00.7 |
HIP 77899 |
29.13 |
| 2026-06-16 00:00 |
15:52:56.58 |
-03:57:56.2 |
HIP 77899 |
29.84 |
| 2026-06-16 12:00 |
15:52:53.18 |
-03:57:51.8 |
HIP 77899 |
30.54 |
| 2026-06-17 00:00 |
15:52:49.78 |
-03:57:47.5 |
HIP 77899 |
31.26 |
| 2026-06-17 12:00 |
15:52:46.40 |
-03:57:43.5 |
HIP 77899 |
31.97 |
| 2026-06-18 00:00 |
15:52:43.03 |
-03:57:39.5 |
HIP 77899 |
32.68 |
| 2026-06-18 12:00 |
15:52:39.68 |
-03:57:35.8 |
HIP 77899 |
33.40 |
| 2026-06-19 00:00 |
15:52:36.34 |
-03:57:32.2 |
HIP 77899 |
34.12 |
| 2026-06-19 12:00 |
15:52:33.02 |
-03:57:28.7 |
HIP 77899 |
34.84 |
| 2026-06-20 00:00 |
15:52:29.71 |
-03:57:25.4 |
HIP 77899 |
35.56 |
| 2026-06-20 12:00 |
15:52:26.41 |
-03:57:22.3 |
HIP 77899 |
36.28 |
| 2026-06-21 00:00 |
15:52:23.14 |
-03:57:19.3 |
HIP 77542 |
36.32 |
| 2026-06-21 12:00 |
15:52:19.87 |
-03:57:16.5 |
HIP 77542 |
35.50 |
| 2026-06-22 00:00 |
15:52:16.63 |
-03:57:13.8 |
HIP 77542 |
34.69 |