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) |
| 2026-03-26 00:00 |
16:02:00.65 |
-04:36:26.7 |
HIP 78594 |
17.55 |
| 2026-03-26 12:00 |
16:01:58.56 |
-04:36:07.8 |
HIP 78594 |
18.14 |
| 2026-03-27 00:00 |
16:01:56.44 |
-04:35:48.8 |
HIP 78594 |
18.73 |
| 2026-03-27 12:00 |
16:01:54.29 |
-04:35:29.8 |
HIP 78594 |
19.34 |
| 2026-03-28 00:00 |
16:01:52.12 |
-04:35:10.8 |
HIP 78594 |
19.94 |
| 2026-03-28 12:00 |
16:01:49.92 |
-04:34:51.8 |
HIP 78594 |
20.56 |
| 2026-03-29 00:00 |
16:01:47.69 |
-04:34:32.8 |
HIP 78594 |
21.18 |
| 2026-03-29 12:00 |
16:01:45.44 |
-04:34:13.8 |
HIP 78594 |
21.81 |
| 2026-03-30 00:00 |
16:01:43.16 |
-04:33:54.7 |
HIP 78594 |
22.44 |
| 2026-03-30 12:00 |
16:01:40.86 |
-04:33:35.7 |
HIP 78594 |
23.07 |
| 2026-03-31 00:00 |
16:01:38.53 |
-04:33:16.7 |
HIP 78594 |
23.72 |
| 2026-03-31 12:00 |
16:01:36.18 |
-04:32:57.7 |
HIP 78594 |
24.37 |
| 2026-04-01 00:00 |
16:01:33.80 |
-04:32:38.7 |
HIP 78594 |
25.02 |
| 2026-04-01 12:00 |
16:01:31.40 |
-04:32:19.7 |
HIP 78594 |
25.68 |
| 2026-04-02 00:00 |
16:01:28.97 |
-04:32:00.7 |
HIP 78594 |
26.35 |
| 2026-04-02 12:00 |
16:01:26.52 |
-04:31:41.7 |
HIP 78594 |
27.02 |
| 2026-04-03 00:00 |
16:01:24.04 |
-04:31:22.7 |
HIP 78594 |
27.69 |
| 2026-04-03 12:00 |
16:01:21.54 |
-04:31:03.8 |
HIP 78594 |
28.38 |
| 2026-04-04 00:00 |
16:01:19.02 |
-04:30:44.8 |
HIP 78594 |
29.06 |
| 2026-04-04 12:00 |
16:01:16.47 |
-04:30:25.9 |
HIP 78594 |
29.75 |
| 2026-04-05 00:00 |
16:01:13.90 |
-04:30:06.9 |
HIP 78594 |
30.45 |
| 2026-04-05 12:00 |
16:01:11.31 |
-04:29:48.0 |
HIP 78594 |
31.15 |
| 2026-04-06 00:00 |
16:01:08.69 |
-04:29:29.1 |
HIP 78594 |
31.86 |
| 2026-04-06 12:00 |
16:01:06.05 |
-04:29:10.2 |
HIP 78594 |
32.58 |
| 2026-04-07 00:00 |
16:01:03.38 |
-04:28:51.4 |
HIP 78594 |
33.29 |
| 2026-04-07 12:00 |
16:01:00.70 |
-04:28:32.5 |
HIP 78594 |
34.02 |
| 2026-04-08 00:00 |
16:00:57.99 |
-04:28:13.7 |
HIP 78594 |
34.74 |
| 2026-04-08 12:00 |
16:00:55.26 |
-04:27:54.9 |
HIP 78594 |
35.48 |
| 2026-04-09 00:00 |
16:00:52.50 |
-04:27:36.1 |
HIP 78594 |
36.21 |
| 2026-04-09 12:00 |
16:00:49.73 |
-04:27:17.4 |
HIP 78594 |
36.96 |
| 2026-04-10 00:00 |
16:00:46.93 |
-04:26:58.7 |
HIP 78594 |
37.70 |
| 2026-04-10 12:00 |
16:00:44.11 |
-04:26:40.0 |
HIP 78594 |
38.46 |
| 2026-04-11 00:00 |
16:00:41.27 |
-04:26:21.4 |
HIP 78396 |
39.03 |
| 2026-04-11 12:00 |
16:00:38.41 |
-04:26:02.7 |
HIP 78396 |
39.23 |
| 2026-04-12 00:00 |
16:00:35.52 |
-04:25:44.1 |
HIP 78396 |
39.45 |
| 2026-04-12 12:00 |
16:00:32.62 |
-04:25:25.6 |
HIP 78190 |
39.15 |
| 2026-04-13 00:00 |
16:00:29.70 |
-04:25:07.1 |
HIP 78190 |
38.44 |
| 2026-04-13 12:00 |
16:00:26.75 |
-04:24:48.6 |
HIP 78190 |
37.73 |
| 2026-04-14 00:00 |
16:00:23.79 |
-04:24:30.2 |
HIP 78190 |
37.02 |
| 2026-04-14 12:00 |
16:00:20.80 |
-04:24:11.8 |
HIP 78190 |
36.30 |
| 2026-04-15 00:00 |
16:00:17.80 |
-04:23:53.4 |
HIP 78190 |
35.59 |
| 2026-04-15 12:00 |
16:00:14.77 |
-04:23:35.1 |
HIP 78190 |
34.87 |
| 2026-04-16 00:00 |
16:00:11.73 |
-04:23:16.8 |
HIP 78190 |
34.16 |