C/2003 U1 (LINEAR)
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
$$
M_a = (16.164 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.164 |
| n |
2.000 |
| gf |
0.993 |
| gb |
-1.000 |
| k |
0.990 |
| δ90 |
5.177 |
| 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) |
| 2026-02-03 00:00 |
16:02:58.72 |
-05:03:45.1 |
HIP 78594 |
14.85 |
| 2026-02-03 12:00 |
16:02:59.68 |
-05:03:33.9 |
HIP 78594 |
14.70 |
| 2026-02-04 00:00 |
16:03:00.62 |
-05:03:22.6 |
HIP 78594 |
14.56 |
| 2026-02-04 12:00 |
16:03:01.52 |
-05:03:11.1 |
HIP 78594 |
14.42 |
| 2026-02-05 00:00 |
16:03:02.40 |
-05:02:59.6 |
HIP 78594 |
14.28 |
| 2026-02-05 12:00 |
16:03:03.24 |
-05:02:47.9 |
HIP 78594 |
14.14 |
| 2026-02-06 00:00 |
16:03:04.06 |
-05:02:36.1 |
HIP 78594 |
14.00 |
| 2026-02-06 12:00 |
16:03:04.85 |
-05:02:24.1 |
HIP 78594 |
13.86 |
| 2026-02-07 00:00 |
16:03:05.61 |
-05:02:12.0 |
HIP 78594 |
13.72 |
| 2026-02-07 12:00 |
16:03:06.33 |
-05:01:59.9 |
HIP 78594 |
13.58 |
| 2026-02-08 00:00 |
16:03:07.03 |
-05:01:47.5 |
HIP 78594 |
13.44 |
| 2026-02-08 12:00 |
16:03:07.70 |
-05:01:35.1 |
HIP 78594 |
13.30 |
| 2026-02-09 00:00 |
16:03:08.34 |
-05:01:22.5 |
HIP 78594 |
13.16 |
| 2026-02-09 12:00 |
16:03:08.95 |
-05:01:09.9 |
HIP 78594 |
13.02 |
| 2026-02-10 00:00 |
16:03:09.53 |
-05:00:57.1 |
HIP 78594 |
12.87 |
| 2026-02-10 12:00 |
16:03:10.08 |
-05:00:44.1 |
HIP 78594 |
12.73 |
| 2026-02-11 00:00 |
16:03:10.60 |
-05:00:31.1 |
HIP 78594 |
12.58 |
| 2026-02-11 12:00 |
16:03:11.09 |
-05:00:17.9 |
HIP 78594 |
12.44 |
| 2026-02-12 00:00 |
16:03:11.55 |
-05:00:04.7 |
HIP 78594 |
12.29 |
| 2026-02-12 12:00 |
16:03:11.98 |
-04:59:51.3 |
HIP 78594 |
12.14 |
| 2026-02-13 00:00 |
16:03:12.38 |
-04:59:37.8 |
HIP 78594 |
11.99 |
| 2026-02-13 12:00 |
16:03:12.74 |
-04:59:24.2 |
HIP 78594 |
11.83 |
| 2026-02-14 00:00 |
16:03:13.08 |
-04:59:10.4 |
HIP 78594 |
11.67 |
| 2026-02-14 12:00 |
16:03:13.39 |
-04:58:56.6 |
HIP 78594 |
11.52 |
| 2026-02-15 00:00 |
16:03:13.66 |
-04:58:42.6 |
HIP 78594 |
11.35 |
| 2026-02-15 12:00 |
16:03:13.91 |
-04:58:28.6 |
HIP 78594 |
11.19 |
| 2026-02-16 00:00 |
16:03:14.12 |
-04:58:14.4 |
HIP 78594 |
11.02 |
| 2026-02-16 12:00 |
16:03:14.30 |
-04:58:00.1 |
HIP 78594 |
10.85 |
| 2026-02-17 00:00 |
16:03:14.46 |
-04:57:45.7 |
HIP 78594 |
10.67 |
| 2026-02-17 12:00 |
16:03:14.58 |
-04:57:31.2 |
HIP 78594 |
10.50 |
| 2026-02-18 00:00 |
16:03:14.67 |
-04:57:16.6 |
HIP 78594 |
10.32 |
| 2026-02-18 12:00 |
16:03:14.73 |
-04:57:01.9 |
HIP 78594 |
10.13 |
| 2026-02-19 00:00 |
16:03:14.75 |
-04:56:47.1 |
HIP 78594 |
9.94 |
| 2026-02-19 12:00 |
16:03:14.75 |
-04:56:32.2 |
HIP 78594 |
9.75 |
| 2026-02-20 00:00 |
16:03:14.72 |
-04:56:17.2 |
HIP 78594 |
9.56 |
| 2026-02-20 12:00 |
16:03:14.65 |
-04:56:02.1 |
HIP 78594 |
9.36 |
| 2026-02-21 00:00 |
16:03:14.55 |
-04:55:46.9 |
HIP 78594 |
9.15 |
| 2026-02-21 12:00 |
16:03:14.43 |
-04:55:31.6 |
HIP 78594 |
8.95 |
| 2026-02-22 00:00 |
16:03:14.27 |
-04:55:16.2 |
HIP 78594 |
8.74 |
| 2026-02-22 12:00 |
16:03:14.08 |
-04:55:00.7 |
HIP 78594 |
8.52 |
| 2026-02-23 00:00 |
16:03:13.85 |
-04:54:45.1 |
HIP 78594 |
8.30 |
| 2026-02-23 12:00 |
16:03:13.60 |
-04:54:29.4 |
HIP 78594 |
8.08 |
| 2026-02-24 00:00 |
16:03:13.32 |
-04:54:13.7 |
HIP 78594 |
7.85 |