P/2001 H5 (NEAT)
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) |
| 2026-02-03 00:00 |
01:37:48.36 |
+18:16:09.4 |
HIP 7571 |
24.67 |
| 2026-02-03 12:00 |
01:37:54.91 |
+18:16:21.8 |
HIP 7571 |
24.76 |
| 2026-02-04 00:00 |
01:38:01.56 |
+18:16:34.9 |
HIP 7571 |
24.95 |
| 2026-02-04 12:00 |
01:38:08.31 |
+18:16:48.6 |
HIP 7571 |
25.23 |
| 2026-02-05 00:00 |
01:38:15.15 |
+18:17:03.0 |
HIP 7571 |
25.61 |
| 2026-02-05 12:00 |
01:38:22.09 |
+18:17:17.9 |
HIP 7571 |
26.08 |
| 2026-02-06 00:00 |
01:38:29.13 |
+18:17:33.6 |
HIP 7571 |
26.66 |
| 2026-02-06 12:00 |
01:38:36.27 |
+18:17:49.8 |
HIP 7571 |
27.33 |
| 2026-02-07 00:00 |
01:38:43.50 |
+18:18:06.7 |
HIP 7571 |
28.10 |
| 2026-02-07 12:00 |
01:38:50.83 |
+18:18:24.1 |
HIP 7571 |
28.96 |
| 2026-02-08 00:00 |
01:38:58.25 |
+18:18:42.3 |
HIP 7571 |
29.90 |
| 2026-02-08 12:00 |
01:39:05.76 |
+18:19:01.0 |
HIP 7571 |
30.93 |
| 2026-02-09 00:00 |
01:39:13.37 |
+18:19:20.3 |
HIP 7571 |
32.04 |
| 2026-02-09 12:00 |
01:39:21.07 |
+18:19:40.3 |
HIP 7571 |
33.22 |
| 2026-02-10 00:00 |
01:39:28.87 |
+18:20:00.9 |
HIP 7571 |
34.47 |
| 2026-02-10 12:00 |
01:39:36.76 |
+18:20:22.1 |
HIP 7893 |
33.31 |
| 2026-02-11 00:00 |
01:39:44.74 |
+18:20:43.9 |
HIP 7893 |
31.55 |
| 2026-02-11 12:00 |
01:39:52.81 |
+18:21:06.3 |
HIP 7893 |
29.79 |
| 2026-02-12 00:00 |
01:40:00.97 |
+18:21:29.3 |
HIP 7893 |
28.03 |
| 2026-02-12 12:00 |
01:40:09.22 |
+18:21:52.9 |
HIP 7893 |
26.28 |
| 2026-02-13 00:00 |
01:40:17.57 |
+18:22:17.1 |
HIP 7893 |
24.54 |
| 2026-02-13 12:00 |
01:40:26.00 |
+18:22:42.0 |
HIP 7893 |
22.83 |
| 2026-02-14 00:00 |
01:40:34.52 |
+18:23:07.4 |
HIP 7893 |
21.15 |
| 2026-02-14 12:00 |
01:40:43.13 |
+18:23:33.4 |
HIP 7893 |
19.53 |
| 2026-02-15 00:00 |
01:40:51.83 |
+18:24:00.0 |
HIP 7893 |
17.98 |
| 2026-02-15 12:00 |
01:41:00.61 |
+18:24:27.2 |
HIP 7893 |
16.55 |
| 2026-02-16 00:00 |
01:41:09.48 |
+18:24:55.0 |
HIP 7893 |
15.25 |
| 2026-02-16 12:00 |
01:41:18.44 |
+18:25:23.4 |
HIP 7893 |
14.16 |
| 2026-02-17 00:00 |
01:41:27.48 |
+18:25:52.3 |
HIP 7893 |
13.32 |
| 2026-02-17 12:00 |
01:41:36.61 |
+18:26:21.9 |
HIP 7893 |
12.80 |
| 2026-02-18 00:00 |
01:41:45.82 |
+18:26:52.0 |
HIP 7893 |
12.64 |
| 2026-02-18 12:00 |
01:41:55.12 |
+18:27:22.7 |
HIP 7893 |
12.88 |
| 2026-02-19 00:00 |
01:42:04.50 |
+18:27:53.9 |
HIP 7893 |
13.50 |
| 2026-02-19 12:00 |
01:42:13.96 |
+18:28:25.7 |
HIP 7893 |
14.47 |
| 2026-02-20 00:00 |
01:42:23.50 |
+18:28:58.1 |
HIP 7893 |
15.73 |
| 2026-02-20 12:00 |
01:42:33.13 |
+18:29:31.0 |
HIP 7893 |
17.22 |
| 2026-02-21 00:00 |
01:42:42.83 |
+18:30:04.5 |
HIP 7893 |
18.89 |
| 2026-02-21 12:00 |
01:42:52.62 |
+18:30:38.6 |
HIP 7893 |
20.72 |
| 2026-02-22 00:00 |
01:43:02.48 |
+18:31:13.2 |
HIP 7893 |
22.66 |
| 2026-02-22 12:00 |
01:43:12.43 |
+18:31:48.3 |
HIP 7893 |
24.71 |
| 2026-02-23 00:00 |
01:43:22.45 |
+18:32:24.0 |
HIP 7893 |
26.83 |
| 2026-02-23 12:00 |
01:43:32.55 |
+18:33:00.3 |
HIP 7893 |
29.02 |
| 2026-02-24 00:00 |
01:43:42.72 |
+18:33:37.0 |
HIP 7893 |
31.26 |