メタデータ
| 項目 |
値 |
| Designation |
C/2002 U2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-12-31T23:39:13.196160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:22Z |
| Obs used |
372 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
12.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2003-01-02.0000000 |
| e |
1.00004468 |
| q (au) |
1.208632 |
| a (au) |
-27048.498281 |
| i (deg) |
59.135691 |
| Ω (om, deg) |
38.776625 |
| ω (w, deg) |
95.846952 |
| M (ma, deg) |
0.000000 |
等級
散乱 + 全体線形
$$
M_a = (13.157 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.157 |
| n |
6.000 |
| gf |
0.984 |
| gb |
-0.818 |
| k |
0.997 |
| δ90 |
9.691 |
| 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 |
21:09:35.22 |
-78:28:43.3 |
HIP 105316 |
31.03 |
| 2026-06-01 12:00 |
21:09:30.29 |
-78:29:16.9 |
HIP 105316 |
31.35 |
| 2026-06-02 00:00 |
21:09:25.25 |
-78:29:50.4 |
HIP 105316 |
31.67 |
| 2026-06-02 12:00 |
21:09:20.11 |
-78:30:23.7 |
HIP 105316 |
32.01 |
| 2026-06-03 00:00 |
21:09:14.87 |
-78:30:57.0 |
HIP 105316 |
32.37 |
| 2026-06-03 12:00 |
21:09:09.52 |
-78:31:30.2 |
HIP 105316 |
32.73 |
| 2026-06-04 00:00 |
21:09:04.07 |
-78:32:03.3 |
HIP 105316 |
33.11 |
| 2026-06-04 12:00 |
21:08:58.51 |
-78:32:36.3 |
HIP 105316 |
33.50 |
| 2026-06-05 00:00 |
21:08:52.86 |
-78:33:09.2 |
HIP 105316 |
33.89 |
| 2026-06-05 12:00 |
21:08:47.09 |
-78:33:42.0 |
HIP 105316 |
34.30 |
| 2026-06-06 00:00 |
21:08:41.23 |
-78:34:14.7 |
HIP 105316 |
34.72 |
| 2026-06-06 12:00 |
21:08:35.26 |
-78:34:47.2 |
HIP 105316 |
35.15 |
| 2026-06-07 00:00 |
21:08:29.19 |
-78:35:19.7 |
HIP 105316 |
35.59 |
| 2026-06-07 12:00 |
21:08:23.02 |
-78:35:52.0 |
HIP 105316 |
36.04 |
| 2026-06-08 00:00 |
21:08:16.75 |
-78:36:24.2 |
HIP 105316 |
36.50 |
| 2026-06-08 12:00 |
21:08:10.38 |
-78:36:56.2 |
HIP 105316 |
36.96 |
| 2026-06-09 00:00 |
21:08:03.90 |
-78:37:28.2 |
HIP 105316 |
37.43 |
| 2026-06-09 12:00 |
21:07:57.32 |
-78:38:00.0 |
HIP 103587 |
37.66 |
| 2026-06-10 00:00 |
21:07:50.65 |
-78:38:31.7 |
HIP 103587 |
37.81 |
| 2026-06-10 12:00 |
21:07:43.87 |
-78:39:03.2 |
HIP 104453 |
37.74 |
| 2026-06-11 00:00 |
21:07:36.99 |
-78:39:34.6 |
HIP 104453 |
37.27 |
| 2026-06-11 12:00 |
21:07:30.01 |
-78:40:05.8 |
HIP 104453 |
36.81 |
| 2026-06-12 00:00 |
21:07:22.94 |
-78:40:36.9 |
HIP 104453 |
36.35 |
| 2026-06-12 12:00 |
21:07:15.76 |
-78:41:07.9 |
HIP 104453 |
35.91 |
| 2026-06-13 00:00 |
21:07:08.49 |
-78:41:38.7 |
HIP 104453 |
35.47 |
| 2026-06-13 12:00 |
21:07:01.11 |
-78:42:09.4 |
HIP 104453 |
35.04 |
| 2026-06-14 00:00 |
21:06:53.64 |
-78:42:39.9 |
HIP 104453 |
34.62 |
| 2026-06-14 12:00 |
21:06:46.08 |
-78:43:10.2 |
HIP 104453 |
34.21 |
| 2026-06-15 00:00 |
21:06:38.41 |
-78:43:40.4 |
HIP 104453 |
33.80 |
| 2026-06-15 12:00 |
21:06:30.65 |
-78:44:10.4 |
HIP 104453 |
33.41 |
| 2026-06-16 00:00 |
21:06:22.79 |
-78:44:40.2 |
HIP 104453 |
33.03 |
| 2026-06-16 12:00 |
21:06:14.84 |
-78:45:09.9 |
HIP 104453 |
32.67 |
| 2026-06-17 00:00 |
21:06:06.80 |
-78:45:39.4 |
HIP 104453 |
32.31 |
| 2026-06-17 12:00 |
21:05:58.66 |
-78:46:08.7 |
HIP 104453 |
31.96 |
| 2026-06-18 00:00 |
21:05:50.43 |
-78:46:37.8 |
HIP 104453 |
31.63 |
| 2026-06-18 12:00 |
21:05:42.10 |
-78:47:06.8 |
HIP 104453 |
31.31 |
| 2026-06-19 00:00 |
21:05:33.68 |
-78:47:35.5 |
HIP 104453 |
31.01 |
| 2026-06-19 12:00 |
21:05:25.17 |
-78:48:04.1 |
HIP 104453 |
30.72 |
| 2026-06-20 00:00 |
21:05:16.58 |
-78:48:32.5 |
HIP 104453 |
30.44 |
| 2026-06-20 12:00 |
21:05:07.89 |
-78:49:00.7 |
HIP 104453 |
30.18 |
| 2026-06-21 00:00 |
21:04:59.11 |
-78:49:28.7 |
HIP 104453 |
29.93 |
| 2026-06-21 12:00 |
21:04:50.24 |
-78:49:56.5 |
HIP 104453 |
29.70 |
| 2026-06-22 00:00 |
21:04:41.29 |
-78:50:24.1 |
HIP 104453 |
29.49 |