メタデータ
| 項目 |
値 |
| Designation |
C/2004 H1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-01-15T07:05:39.554880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:40Z |
| Obs used |
71 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2004-04-19.0000000 |
| e |
0.99989721 |
| q (au) |
2.080742 |
| a (au) |
20242.963449 |
| i (deg) |
140.672988 |
| Ω (om, deg) |
120.046982 |
| ω (w, deg) |
290.524558 |
| M (ma, deg) |
0.000032 |
等級
散乱 + 全体線形
$$
M_a = (17.724 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.724 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 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) |
| 2026-05-12 00:00 |
01:06:16.24 |
+49:09:39.9 |
HIP 5028 |
18.45 |
| 2026-05-12 12:00 |
01:06:19.28 |
+49:10:03.4 |
HIP 5028 |
18.89 |
| 2026-05-13 00:00 |
01:06:22.29 |
+49:10:27.1 |
HIP 5028 |
19.33 |
| 2026-05-13 12:00 |
01:06:25.29 |
+49:10:50.9 |
HIP 5028 |
19.79 |
| 2026-05-14 00:00 |
01:06:28.27 |
+49:11:14.8 |
HIP 5028 |
20.25 |
| 2026-05-14 12:00 |
01:06:31.24 |
+49:11:38.9 |
HIP 5028 |
20.71 |
| 2026-05-15 00:00 |
01:06:34.18 |
+49:12:03.1 |
HIP 5028 |
21.18 |
| 2026-05-15 12:00 |
01:06:37.11 |
+49:12:27.4 |
HIP 5028 |
21.66 |
| 2026-05-16 00:00 |
01:06:40.02 |
+49:12:51.8 |
HIP 5262 |
21.19 |
| 2026-05-16 12:00 |
01:06:42.91 |
+49:13:16.4 |
HIP 5262 |
20.68 |
| 2026-05-17 00:00 |
01:06:45.78 |
+49:13:41.1 |
HIP 5262 |
20.17 |
| 2026-05-17 12:00 |
01:06:48.63 |
+49:14:05.9 |
HIP 5262 |
19.66 |
| 2026-05-18 00:00 |
01:06:51.47 |
+49:14:30.9 |
HIP 5262 |
19.16 |
| 2026-05-18 12:00 |
01:06:54.28 |
+49:14:55.9 |
HIP 5262 |
18.67 |
| 2026-05-19 00:00 |
01:06:57.07 |
+49:15:21.1 |
HIP 5262 |
18.18 |
| 2026-05-19 12:00 |
01:06:59.85 |
+49:15:46.3 |
HIP 5262 |
17.70 |
| 2026-05-20 00:00 |
01:07:02.60 |
+49:16:11.7 |
HIP 5262 |
17.23 |
| 2026-05-20 12:00 |
01:07:05.33 |
+49:16:37.2 |
HIP 5262 |
16.77 |
| 2026-05-21 00:00 |
01:07:08.04 |
+49:17:02.8 |
HIP 5262 |
16.31 |
| 2026-05-21 12:00 |
01:07:10.74 |
+49:17:28.5 |
HIP 5262 |
15.86 |
| 2026-05-22 00:00 |
01:07:13.41 |
+49:17:54.3 |
HIP 5262 |
15.42 |
| 2026-05-22 12:00 |
01:07:16.05 |
+49:18:20.2 |
HIP 5262 |
14.99 |
| 2026-05-23 00:00 |
01:07:18.68 |
+49:18:46.2 |
HIP 5262 |
14.58 |
| 2026-05-23 12:00 |
01:07:21.29 |
+49:19:12.4 |
HIP 5262 |
14.17 |
| 2026-05-24 00:00 |
01:07:23.87 |
+49:19:38.6 |
HIP 5262 |
13.78 |
| 2026-05-24 12:00 |
01:07:26.44 |
+49:20:04.8 |
HIP 5262 |
13.40 |
| 2026-05-25 00:00 |
01:07:28.98 |
+49:20:31.2 |
HIP 5262 |
13.04 |
| 2026-05-25 12:00 |
01:07:31.49 |
+49:20:57.7 |
HIP 5262 |
12.69 |
| 2026-05-26 00:00 |
01:07:33.99 |
+49:21:24.3 |
HIP 5262 |
12.36 |
| 2026-05-26 12:00 |
01:07:36.46 |
+49:21:50.9 |
HIP 5262 |
12.05 |
| 2026-05-27 00:00 |
01:07:38.91 |
+49:22:17.7 |
HIP 5262 |
11.76 |
| 2026-05-27 12:00 |
01:07:41.34 |
+49:22:44.5 |
HIP 5262 |
11.49 |
| 2026-05-28 00:00 |
01:07:43.74 |
+49:23:11.4 |
HIP 5262 |
11.24 |
| 2026-05-28 12:00 |
01:07:46.13 |
+49:23:38.4 |
HIP 5262 |
11.01 |
| 2026-05-29 00:00 |
01:07:48.48 |
+49:24:05.4 |
HIP 5262 |
10.81 |
| 2026-05-29 12:00 |
01:07:50.82 |
+49:24:32.6 |
HIP 5262 |
10.64 |
| 2026-05-30 00:00 |
01:07:53.13 |
+49:24:59.8 |
HIP 5262 |
10.49 |
| 2026-05-30 12:00 |
01:07:55.41 |
+49:25:27.1 |
HIP 5262 |
10.37 |
| 2026-05-31 00:00 |
01:07:57.68 |
+49:25:54.4 |
HIP 5262 |
10.28 |
| 2026-05-31 12:00 |
01:07:59.91 |
+49:26:21.9 |
HIP 5262 |
10.22 |
| 2026-06-01 00:00 |
01:08:02.13 |
+49:26:49.4 |
HIP 5262 |
10.18 |
| 2026-06-01 12:00 |
01:08:04.32 |
+49:27:16.9 |
HIP 5262 |
10.18 |
| 2026-06-02 00:00 |
01:08:06.48 |
+49:27:44.5 |
HIP 5262 |
10.21 |