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) |
| 2026-07-29 00:00 |
01:08:59.46 |
+50:19:12.5 |
HIP 5421 |
23.72 |
| 2026-07-29 12:00 |
01:08:58.07 |
+50:19:34.7 |
HIP 5421 |
23.38 |
| 2026-07-30 00:00 |
01:08:56.65 |
+50:19:56.8 |
HIP 5421 |
23.04 |
| 2026-07-30 12:00 |
01:08:55.20 |
+50:20:18.7 |
HIP 5421 |
22.72 |
| 2026-07-31 00:00 |
01:08:53.71 |
+50:20:40.4 |
HIP 5421 |
22.39 |
| 2026-07-31 12:00 |
01:08:52.19 |
+50:21:02.0 |
HIP 5421 |
22.08 |
| 2026-08-01 00:00 |
01:08:50.64 |
+50:21:23.4 |
HIP 5421 |
21.77 |
| 2026-08-01 12:00 |
01:08:49.06 |
+50:21:44.6 |
HIP 5421 |
21.48 |
| 2026-08-02 00:00 |
01:08:47.45 |
+50:22:05.7 |
HIP 5421 |
21.19 |
| 2026-08-02 12:00 |
01:08:45.80 |
+50:22:26.6 |
HIP 5421 |
20.91 |
| 2026-08-03 00:00 |
01:08:44.12 |
+50:22:47.4 |
HIP 5421 |
20.64 |
| 2026-08-03 12:00 |
01:08:42.41 |
+50:23:07.9 |
HIP 5421 |
20.37 |
| 2026-08-04 00:00 |
01:08:40.67 |
+50:23:28.3 |
HIP 5236 |
20.03 |
| 2026-08-04 12:00 |
01:08:38.90 |
+50:23:48.6 |
HIP 5236 |
19.61 |
| 2026-08-05 00:00 |
01:08:37.10 |
+50:24:08.6 |
HIP 5236 |
19.18 |
| 2026-08-05 12:00 |
01:08:35.26 |
+50:24:28.5 |
HIP 5236 |
18.75 |
| 2026-08-06 00:00 |
01:08:33.39 |
+50:24:48.1 |
HIP 5236 |
18.32 |
| 2026-08-06 12:00 |
01:08:31.49 |
+50:25:07.6 |
HIP 5236 |
17.88 |
| 2026-08-07 00:00 |
01:08:29.56 |
+50:25:27.0 |
HIP 5236 |
17.45 |
| 2026-08-07 12:00 |
01:08:27.60 |
+50:25:46.1 |
HIP 5236 |
17.01 |
| 2026-08-08 00:00 |
01:08:25.61 |
+50:26:05.0 |
HIP 5236 |
16.57 |
| 2026-08-08 12:00 |
01:08:23.59 |
+50:26:23.8 |
HIP 5236 |
16.13 |
| 2026-08-09 00:00 |
01:08:21.53 |
+50:26:42.3 |
HIP 5236 |
15.69 |
| 2026-08-09 12:00 |
01:08:19.45 |
+50:27:00.7 |
HIP 5236 |
15.24 |
| 2026-08-10 00:00 |
01:08:17.33 |
+50:27:18.9 |
HIP 5236 |
14.80 |
| 2026-08-10 12:00 |
01:08:15.18 |
+50:27:36.8 |
HIP 5236 |
14.35 |
| 2026-08-11 00:00 |
01:08:13.00 |
+50:27:54.6 |
HIP 5236 |
13.90 |
| 2026-08-11 12:00 |
01:08:10.80 |
+50:28:12.2 |
HIP 5236 |
13.45 |
| 2026-08-12 00:00 |
01:08:08.56 |
+50:28:29.6 |
HIP 5236 |
12.99 |
| 2026-08-12 12:00 |
01:08:06.29 |
+50:28:46.7 |
HIP 5236 |
12.53 |
| 2026-08-13 00:00 |
01:08:03.99 |
+50:29:03.7 |
HIP 5236 |
12.08 |
| 2026-08-13 12:00 |
01:08:01.66 |
+50:29:20.5 |
HIP 5236 |
11.62 |
| 2026-08-14 00:00 |
01:07:59.30 |
+50:29:37.0 |
HIP 5236 |
11.15 |
| 2026-08-14 12:00 |
01:07:56.92 |
+50:29:53.3 |
HIP 5236 |
10.69 |
| 2026-08-15 00:00 |
01:07:54.50 |
+50:30:09.5 |
HIP 5236 |
10.22 |
| 2026-08-15 12:00 |
01:07:52.05 |
+50:30:25.4 |
HIP 5236 |
9.75 |
| 2026-08-16 00:00 |
01:07:49.58 |
+50:30:41.1 |
HIP 5236 |
9.28 |
| 2026-08-16 12:00 |
01:07:47.07 |
+50:30:56.5 |
HIP 5236 |
8.81 |
| 2026-08-17 00:00 |
01:07:44.54 |
+50:31:11.8 |
HIP 5236 |
8.33 |
| 2026-08-17 12:00 |
01:07:41.98 |
+50:31:26.8 |
HIP 5236 |
7.85 |
| 2026-08-18 00:00 |
01:07:39.39 |
+50:31:41.7 |
HIP 5236 |
7.38 |
| 2026-08-18 12:00 |
01:07:36.77 |
+50:31:56.3 |
HIP 5236 |
6.89 |
| 2026-08-19 00:00 |
01:07:34.12 |
+50:32:10.7 |
HIP 5236 |
6.41 |