メタデータ
| 項目 |
値 |
| Designation |
P/2001 H5 (NEAT) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2001-01-28T16:49:48.224640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
43 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
24.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2001-05-03.0000000 |
| e |
0.60019118 |
| q (au) |
2.396649 |
| a (au) |
5.994487 |
| i (deg) |
8.399268 |
| Ω (om, deg) |
329.563064 |
| ω (w, deg) |
224.878306 |
| M (ma, deg) |
6.332598 |
等級
散乱 + 全体線形
$$
M_a = (13.684 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.684 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.726 |
| 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) |
| 2026-06-01 00:00 |
02:28:51.76 |
+22:13:08.6 |
HIP 11728 |
36.14 |
| 2026-06-01 12:00 |
02:29:05.85 |
+22:14:27.6 |
HIP 11728 |
33.31 |
| 2026-06-02 00:00 |
02:29:19.90 |
+22:15:46.5 |
HIP 11728 |
30.62 |
| 2026-06-02 12:00 |
02:29:33.92 |
+22:17:05.3 |
HIP 11728 |
28.12 |
| 2026-06-03 00:00 |
02:29:47.90 |
+22:18:24.0 |
HIP 11728 |
25.86 |
| 2026-06-03 12:00 |
02:30:01.84 |
+22:19:42.7 |
HIP 11728 |
23.91 |
| 2026-06-04 00:00 |
02:30:15.74 |
+22:21:01.3 |
HIP 11728 |
22.34 |
| 2026-06-04 12:00 |
02:30:29.60 |
+22:22:19.8 |
HIP 11728 |
21.24 |
| 2026-06-05 00:00 |
02:30:43.43 |
+22:23:38.2 |
HIP 11728 |
20.66 |
| 2026-06-05 12:00 |
02:30:57.21 |
+22:24:56.5 |
HIP 11814 |
20.42 |
| 2026-06-06 00:00 |
02:31:10.96 |
+22:26:14.8 |
HIP 11814 |
17.77 |
| 2026-06-06 12:00 |
02:31:24.66 |
+22:27:33.0 |
HIP 11814 |
15.43 |
| 2026-06-07 00:00 |
02:31:38.32 |
+22:28:51.0 |
HIP 11814 |
13.57 |
| 2026-06-07 12:00 |
02:31:51.94 |
+22:30:09.0 |
HIP 11814 |
12.39 |
| 2026-06-08 00:00 |
02:32:05.52 |
+22:31:26.9 |
HIP 11814 |
12.10 |
| 2026-06-08 12:00 |
02:32:19.05 |
+22:32:44.7 |
HIP 11814 |
12.73 |
| 2026-06-09 00:00 |
02:32:32.54 |
+22:34:02.4 |
HIP 11814 |
14.17 |
| 2026-06-09 12:00 |
02:32:45.98 |
+22:35:20.0 |
HIP 11814 |
16.19 |
| 2026-06-10 00:00 |
02:32:59.38 |
+22:36:37.5 |
HIP 11814 |
18.59 |
| 2026-06-10 12:00 |
02:33:12.73 |
+22:37:54.8 |
HIP 11814 |
21.25 |
| 2026-06-11 00:00 |
02:33:26.04 |
+22:39:12.1 |
HIP 11814 |
24.07 |
| 2026-06-11 12:00 |
02:33:39.30 |
+22:40:29.2 |
HIP 11995 |
22.37 |
| 2026-06-12 00:00 |
02:33:52.51 |
+22:41:46.3 |
HIP 11995 |
19.54 |
| 2026-06-12 12:00 |
02:34:05.67 |
+22:43:03.2 |
HIP 11995 |
16.90 |
| 2026-06-13 00:00 |
02:34:18.78 |
+22:44:20.0 |
HIP 11995 |
14.53 |
| 2026-06-13 12:00 |
02:34:31.84 |
+22:45:36.6 |
HIP 11995 |
12.58 |
| 2026-06-14 00:00 |
02:34:44.85 |
+22:46:53.2 |
HIP 11995 |
11.26 |
| 2026-06-14 12:00 |
02:34:57.81 |
+22:48:09.6 |
HIP 11995 |
10.80 |
| 2026-06-15 00:00 |
02:35:10.72 |
+22:49:25.9 |
HIP 11995 |
11.28 |
| 2026-06-15 12:00 |
02:35:23.57 |
+22:50:42.0 |
HIP 11995 |
12.59 |
| 2026-06-16 00:00 |
02:35:36.37 |
+22:51:58.0 |
HIP 11995 |
14.50 |
| 2026-06-16 12:00 |
02:35:49.12 |
+22:53:13.9 |
HIP 12159 |
15.73 |
| 2026-06-17 00:00 |
02:36:01.81 |
+22:54:29.6 |
HIP 12159 |
12.70 |
| 2026-06-17 12:00 |
02:36:14.44 |
+22:55:45.1 |
HIP 12159 |
9.78 |
| 2026-06-18 00:00 |
02:36:27.02 |
+22:57:00.6 |
HIP 12159 |
7.08 |
| 2026-06-18 12:00 |
02:36:39.54 |
+22:58:15.8 |
HIP 12159 |
4.96 |
| 2026-06-19 00:00 |
02:36:52.01 |
+22:59:30.9 |
HIP 12159 |
4.33 |
| 2026-06-19 12:00 |
02:37:04.42 |
+23:00:45.9 |
HIP 12159 |
5.69 |
| 2026-06-20 00:00 |
02:37:16.76 |
+23:02:00.7 |
HIP 12159 |
8.08 |
| 2026-06-20 12:00 |
02:37:29.05 |
+23:03:15.3 |
HIP 12257 |
6.44 |
| 2026-06-21 00:00 |
02:37:41.28 |
+23:04:29.8 |
HIP 12257 |
3.70 |
| 2026-06-21 12:00 |
02:37:53.45 |
+23:05:44.1 |
HIP 12257 |
2.20 |
| 2026-06-22 00:00 |
02:38:05.56 |
+23:06:58.3 |
HIP 12257 |
3.82 |