メタデータ
| 項目 |
値 |
| Designation |
C/2005 H1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-10-28T12:40:07.613760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:48Z |
| Obs used |
169 |
| NEO |
- |
| M1 |
12.900 |
| 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) |
2005-05-28.0000000 |
| e |
0.89692366 |
| q (au) |
4.768597 |
| a (au) |
46.262766 |
| i (deg) |
81.512268 |
| Ω (om, deg) |
71.490714 |
| ω (w, deg) |
95.212944 |
| M (ma, deg) |
0.662384 |
等級
散乱 + 全体線形
$$
M_a = (5.633 + 5.458\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.633 |
| n |
5.458 |
| gf |
0.982 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.963 |
| 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) |
| 2026-07-29 00:00 |
16:04:58.00 |
-84:17:32.4 |
HIP 79242 |
8.77 |
| 2026-07-29 12:00 |
16:04:42.57 |
-84:16:54.4 |
HIP 79242 |
8.89 |
| 2026-07-30 00:00 |
16:04:27.43 |
-84:16:16.3 |
HIP 79242 |
9.07 |
| 2026-07-30 12:00 |
16:04:12.61 |
-84:15:37.9 |
HIP 79242 |
9.30 |
| 2026-07-31 00:00 |
16:03:58.10 |
-84:14:59.5 |
HIP 79242 |
9.57 |
| 2026-07-31 12:00 |
16:03:43.90 |
-84:14:20.8 |
HIP 79242 |
9.88 |
| 2026-08-01 00:00 |
16:03:30.00 |
-84:13:42.1 |
HIP 79242 |
10.23 |
| 2026-08-01 12:00 |
16:03:16.41 |
-84:13:03.2 |
HIP 79242 |
10.61 |
| 2026-08-02 00:00 |
16:03:03.12 |
-84:12:24.2 |
HIP 79242 |
11.03 |
| 2026-08-02 12:00 |
16:02:50.14 |
-84:11:45.0 |
HIP 79242 |
11.46 |
| 2026-08-03 00:00 |
16:02:37.47 |
-84:11:05.7 |
HIP 79242 |
11.92 |
| 2026-08-03 12:00 |
16:02:25.10 |
-84:10:26.3 |
HIP 79242 |
12.41 |
| 2026-08-04 00:00 |
16:02:13.04 |
-84:09:46.8 |
HIP 79242 |
12.90 |
| 2026-08-04 12:00 |
16:02:01.28 |
-84:09:07.2 |
HIP 79242 |
13.42 |
| 2026-08-05 00:00 |
16:01:49.82 |
-84:08:27.5 |
HIP 79242 |
13.94 |
| 2026-08-05 12:00 |
16:01:38.66 |
-84:07:47.6 |
HIP 79242 |
14.48 |
| 2026-08-06 00:00 |
16:01:27.81 |
-84:07:07.7 |
HIP 79242 |
15.03 |
| 2026-08-06 12:00 |
16:01:17.26 |
-84:06:27.6 |
HIP 79242 |
15.59 |
| 2026-08-07 00:00 |
16:01:07.00 |
-84:05:47.5 |
HIP 79242 |
16.16 |
| 2026-08-07 12:00 |
16:00:57.05 |
-84:05:07.3 |
HIP 79242 |
16.73 |
| 2026-08-08 00:00 |
16:00:47.39 |
-84:04:27.0 |
HIP 79242 |
17.31 |
| 2026-08-08 12:00 |
16:00:38.04 |
-84:03:46.6 |
HIP 79242 |
17.89 |
| 2026-08-09 00:00 |
16:00:28.98 |
-84:03:06.2 |
HIP 78783 |
17.99 |
| 2026-08-09 12:00 |
16:00:20.21 |
-84:02:25.7 |
HIP 78783 |
17.48 |
| 2026-08-10 00:00 |
16:00:11.74 |
-84:01:45.1 |
HIP 78783 |
16.97 |
| 2026-08-10 12:00 |
16:00:03.57 |
-84:01:04.5 |
HIP 78783 |
16.48 |
| 2026-08-11 00:00 |
15:59:55.69 |
-84:00:23.8 |
HIP 78783 |
16.00 |
| 2026-08-11 12:00 |
15:59:48.11 |
-83:59:43.0 |
HIP 78783 |
15.53 |
| 2026-08-12 00:00 |
15:59:40.81 |
-83:59:02.2 |
HIP 78783 |
15.07 |
| 2026-08-12 12:00 |
15:59:33.81 |
-83:58:21.3 |
HIP 78783 |
14.63 |
| 2026-08-13 00:00 |
15:59:27.09 |
-83:57:40.5 |
HIP 78783 |
14.21 |
| 2026-08-13 12:00 |
15:59:20.67 |
-83:56:59.5 |
HIP 78783 |
13.81 |
| 2026-08-14 00:00 |
15:59:14.53 |
-83:56:18.6 |
HIP 78783 |
13.42 |
| 2026-08-14 12:00 |
15:59:08.68 |
-83:55:37.6 |
HIP 78783 |
13.05 |
| 2026-08-15 00:00 |
15:59:03.11 |
-83:54:56.6 |
HIP 78783 |
12.71 |
| 2026-08-15 12:00 |
15:58:57.83 |
-83:54:15.6 |
HIP 78783 |
12.39 |
| 2026-08-16 00:00 |
15:58:52.83 |
-83:53:34.5 |
HIP 78783 |
12.10 |
| 2026-08-16 12:00 |
15:58:48.11 |
-83:52:53.5 |
HIP 78783 |
11.84 |
| 2026-08-17 00:00 |
15:58:43.67 |
-83:52:12.4 |
HIP 78783 |
11.60 |
| 2026-08-17 12:00 |
15:58:39.51 |
-83:51:31.3 |
HIP 78783 |
11.40 |
| 2026-08-18 00:00 |
15:58:35.63 |
-83:50:50.3 |
HIP 78783 |
11.23 |
| 2026-08-18 12:00 |
15:58:32.02 |
-83:50:09.2 |
HIP 78783 |
11.09 |
| 2026-08-19 00:00 |
15:58:28.68 |
-83:49:28.1 |
HIP 78783 |
10.99 |