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) |
| 2026-07-29 00:00 |
00:14:45.26 |
+01:35:53.8 |
HIP 1169 |
18.22 |
| 2026-07-29 12:00 |
00:14:41.35 |
+01:35:37.8 |
HIP 1169 |
17.86 |
| 2026-07-30 00:00 |
00:14:37.34 |
+01:35:21.1 |
HIP 1107 |
17.51 |
| 2026-07-30 12:00 |
00:14:33.24 |
+01:35:03.9 |
HIP 1107 |
16.59 |
| 2026-07-31 00:00 |
00:14:29.06 |
+01:34:46.1 |
HIP 1107 |
15.67 |
| 2026-07-31 12:00 |
00:14:24.79 |
+01:34:27.8 |
HIP 1107 |
14.75 |
| 2026-08-01 00:00 |
00:14:20.43 |
+01:34:08.9 |
HIP 1107 |
13.83 |
| 2026-08-01 12:00 |
00:14:15.99 |
+01:33:49.5 |
HIP 1107 |
12.93 |
| 2026-08-02 00:00 |
00:14:11.45 |
+01:33:29.5 |
HIP 1107 |
12.05 |
| 2026-08-02 12:00 |
00:14:06.83 |
+01:33:09.0 |
HIP 1107 |
11.22 |
| 2026-08-03 00:00 |
00:14:02.13 |
+01:32:47.9 |
HIP 1107 |
10.43 |
| 2026-08-03 12:00 |
00:13:57.34 |
+01:32:26.3 |
HIP 1107 |
9.73 |
| 2026-08-04 00:00 |
00:13:52.46 |
+01:32:04.1 |
HIP 1107 |
9.13 |
| 2026-08-04 12:00 |
00:13:47.50 |
+01:31:41.4 |
HIP 1107 |
8.67 |
| 2026-08-05 00:00 |
00:13:42.45 |
+01:31:18.1 |
HIP 1107 |
8.38 |
| 2026-08-05 12:00 |
00:13:37.32 |
+01:30:54.3 |
HIP 1107 |
8.30 |
| 2026-08-06 00:00 |
00:13:32.10 |
+01:30:30.0 |
HIP 1107 |
8.42 |
| 2026-08-06 12:00 |
00:13:26.80 |
+01:30:05.1 |
HIP 1107 |
8.77 |
| 2026-08-07 00:00 |
00:13:21.42 |
+01:29:39.7 |
HIP 1107 |
9.32 |
| 2026-08-07 12:00 |
00:13:15.95 |
+01:29:13.8 |
HIP 1107 |
10.06 |
| 2026-08-08 00:00 |
00:13:10.40 |
+01:28:47.3 |
HIP 1107 |
10.94 |
| 2026-08-08 12:00 |
00:13:04.77 |
+01:28:20.3 |
HIP 1107 |
11.95 |
| 2026-08-09 00:00 |
00:12:59.06 |
+01:27:52.8 |
HIP 1107 |
13.07 |
| 2026-08-09 12:00 |
00:12:53.26 |
+01:27:24.8 |
HIP 1107 |
14.27 |
| 2026-08-10 00:00 |
00:12:47.39 |
+01:26:56.3 |
HIP 1107 |
15.55 |
| 2026-08-10 12:00 |
00:12:41.43 |
+01:26:27.2 |
HIP 1107 |
16.89 |
| 2026-08-11 00:00 |
00:12:35.39 |
+01:25:57.7 |
HIP 1107 |
18.28 |
| 2026-08-11 12:00 |
00:12:29.28 |
+01:25:27.6 |
HIP 1107 |
19.72 |
| 2026-08-12 00:00 |
00:12:23.08 |
+01:24:57.0 |
HIP 1107 |
21.21 |
| 2026-08-12 12:00 |
00:12:16.81 |
+01:24:25.9 |
HIP 1107 |
22.73 |
| 2026-08-13 00:00 |
00:12:10.46 |
+01:23:54.4 |
HIP 1107 |
24.29 |
| 2026-08-13 12:00 |
00:12:04.04 |
+01:23:22.3 |
HIP 1107 |
25.88 |
| 2026-08-14 00:00 |
00:11:57.53 |
+01:22:49.8 |
HIP 1107 |
27.51 |
| 2026-08-14 12:00 |
00:11:50.96 |
+01:22:16.7 |
HIP 1107 |
29.16 |
| 2026-08-15 00:00 |
00:11:44.30 |
+01:21:43.2 |
HIP 1107 |
30.84 |
| 2026-08-15 12:00 |
00:11:37.58 |
+01:21:09.3 |
HIP 1107 |
32.55 |
| 2026-08-16 00:00 |
00:11:30.78 |
+01:20:34.8 |
HIP 769 |
31.25 |
| 2026-08-16 12:00 |
00:11:23.90 |
+01:20:00.0 |
HIP 769 |
29.46 |
| 2026-08-17 00:00 |
00:11:16.96 |
+01:19:24.5 |
HIP 769 |
27.64 |
| 2026-08-17 12:00 |
00:11:09.94 |
+01:18:48.7 |
HIP 769 |
25.81 |
| 2026-08-18 00:00 |
00:11:02.86 |
+01:18:12.4 |
HIP 769 |
23.97 |
| 2026-08-18 12:00 |
00:10:55.70 |
+01:17:35.7 |
HIP 769 |
22.11 |
| 2026-08-19 00:00 |
00:10:48.47 |
+01:16:58.5 |
HIP 769 |
20.24 |