メタデータ
| 項目 |
値 |
| Designation |
P/2003 F2 (NEAT) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2003-04-14T18:46:40.431360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:27Z |
| Obs used |
74 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2003-04-06.0000000 |
| e |
0.54224939 |
| q (au) |
2.977207 |
| a (au) |
6.503993 |
| i (deg) |
11.604533 |
| Ω (om, deg) |
359.028575 |
| ω (w, deg) |
191.592692 |
| M (ma, deg) |
359.478147 |
等級
散乱 + 全体線形
$$
M_a = (15.477 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.477 |
| n |
2.000 |
| gf |
0.982 |
| gb |
-0.948 |
| k |
1.000 |
| δ90 |
9.631 |
| 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) |
| 2026-03-26 00:00 |
23:49:46.94 |
-01:39:56.2 |
HIP 117612 |
26.24 |
| 2026-03-26 12:00 |
23:49:59.14 |
-01:38:29.0 |
HIP 117612 |
24.93 |
| 2026-03-27 00:00 |
23:50:11.33 |
-01:37:01.9 |
HIP 117612 |
24.03 |
| 2026-03-27 12:00 |
23:50:23.50 |
-01:35:34.9 |
HIP 117612 |
23.57 |
| 2026-03-28 00:00 |
23:50:35.66 |
-01:34:08.0 |
HIP 117612 |
23.60 |
| 2026-03-28 12:00 |
23:50:47.81 |
-01:32:41.2 |
HIP 117612 |
24.10 |
| 2026-03-29 00:00 |
23:50:59.95 |
-01:31:14.5 |
HIP 117612 |
25.04 |
| 2026-03-29 12:00 |
23:51:12.07 |
-01:29:47.9 |
HIP 117612 |
26.38 |
| 2026-03-30 00:00 |
23:51:24.17 |
-01:28:21.4 |
HIP 117612 |
28.05 |
| 2026-03-30 12:00 |
23:51:36.26 |
-01:26:55.0 |
HIP 117612 |
30.01 |
| 2026-03-31 00:00 |
23:51:48.34 |
-01:25:28.7 |
HIP 117820 |
31.60 |
| 2026-03-31 12:00 |
23:52:00.39 |
-01:24:02.6 |
HIP 117820 |
29.66 |
| 2026-04-01 00:00 |
23:52:12.43 |
-01:22:36.5 |
HIP 117820 |
28.00 |
| 2026-04-01 12:00 |
23:52:24.46 |
-01:21:10.6 |
HIP 117820 |
26.65 |
| 2026-04-02 00:00 |
23:52:36.46 |
-01:19:44.8 |
HIP 117820 |
25.67 |
| 2026-04-02 12:00 |
23:52:48.45 |
-01:18:19.1 |
HIP 117820 |
25.09 |
| 2026-04-03 00:00 |
23:53:00.42 |
-01:16:53.5 |
HIP 117820 |
24.95 |
| 2026-04-03 12:00 |
23:53:12.37 |
-01:15:28.1 |
HIP 117820 |
25.24 |
| 2026-04-04 00:00 |
23:53:24.30 |
-01:14:02.8 |
HIP 117820 |
25.95 |
| 2026-04-04 12:00 |
23:53:36.21 |
-01:12:37.6 |
HIP 117820 |
27.05 |
| 2026-04-05 00:00 |
23:53:48.09 |
-01:11:12.6 |
HIP 117937 |
24.47 |
| 2026-04-05 12:00 |
23:53:59.96 |
-01:09:47.7 |
HIP 117937 |
21.24 |
| 2026-04-06 00:00 |
23:54:11.81 |
-01:08:23.0 |
HIP 117937 |
18.04 |
| 2026-04-06 12:00 |
23:54:23.63 |
-01:06:58.4 |
HIP 117937 |
14.88 |
| 2026-04-07 00:00 |
23:54:35.43 |
-01:05:33.9 |
HIP 117937 |
11.80 |
| 2026-04-07 12:00 |
23:54:47.21 |
-01:04:09.7 |
HIP 117937 |
8.84 |
| 2026-04-08 00:00 |
23:54:58.97 |
-01:02:45.5 |
HIP 117937 |
6.22 |
| 2026-04-08 12:00 |
23:55:10.70 |
-01:01:21.6 |
HIP 117937 |
4.50 |
| 2026-04-09 00:00 |
23:55:22.40 |
-00:59:57.7 |
HIP 117937 |
4.80 |
| 2026-04-09 12:00 |
23:55:34.09 |
-00:58:34.1 |
HIP 117937 |
6.83 |
| 2026-04-10 00:00 |
23:55:45.74 |
-00:57:10.6 |
HIP 117937 |
9.55 |
| 2026-04-10 12:00 |
23:55:57.37 |
-00:55:47.3 |
HIP 118028 |
7.60 |
| 2026-04-11 00:00 |
23:56:08.98 |
-00:54:24.2 |
HIP 118028 |
4.94 |
| 2026-04-11 12:00 |
23:56:20.55 |
-00:53:01.3 |
HIP 118028 |
3.43 |
| 2026-04-12 00:00 |
23:56:32.10 |
-00:51:38.5 |
HIP 118028 |
4.43 |
| 2026-04-12 12:00 |
23:56:43.62 |
-00:50:15.9 |
HIP 118028 |
6.92 |
| 2026-04-13 00:00 |
23:56:55.11 |
-00:48:53.6 |
HIP 118028 |
9.82 |
| 2026-04-13 12:00 |
23:57:06.58 |
-00:47:31.4 |
HIP 118028 |
12.84 |
| 2026-04-14 00:00 |
23:57:18.01 |
-00:46:09.4 |
HIP 118028 |
15.92 |
| 2026-04-14 12:00 |
23:57:29.41 |
-00:44:47.6 |
HIP 118028 |
19.02 |
| 2026-04-15 00:00 |
23:57:40.79 |
-00:43:26.0 |
HIP 118028 |
22.13 |
| 2026-04-15 12:00 |
23:57:52.13 |
-00:42:04.6 |
HIP 118028 |
25.24 |
| 2026-04-16 00:00 |
23:58:03.44 |
-00:40:43.5 |
HIP 118028 |
28.34 |