C/2004 P1 (NEAT)
メタデータ
| 項目 |
値 |
| Designation |
C/2004 P1 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-08-08T17:39:35.953920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:42Z |
| Obs used |
148 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
6.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2004-09-09.0000000 |
| e |
0.99925569 |
| q (au) |
6.013775 |
| a (au) |
8079.698737 |
| i (deg) |
28.816238 |
| Ω (om, deg) |
284.183334 |
| ω (w, deg) |
16.584545 |
| M (ma, deg) |
0.000539 |
等級
散乱 + 全体線形
$$
M_a = (10.537 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.537 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-0.507 |
| k |
1.000 |
| 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 |
04:56:09.00 |
+36:29:53.6 |
HIP 22955 |
19.91 |
| 2026-02-03 12:00 |
04:56:07.33 |
+36:29:40.3 |
HIP 22955 |
19.73 |
| 2026-02-04 00:00 |
04:56:05.70 |
+36:29:27.1 |
HIP 22955 |
19.56 |
| 2026-02-04 12:00 |
04:56:04.09 |
+36:29:13.9 |
HIP 22955 |
19.39 |
| 2026-02-05 00:00 |
04:56:02.52 |
+36:29:00.6 |
HIP 22955 |
19.23 |
| 2026-02-05 12:00 |
04:56:00.97 |
+36:28:47.4 |
HIP 22955 |
19.07 |
| 2026-02-06 00:00 |
04:55:59.46 |
+36:28:34.1 |
HIP 22955 |
18.92 |
| 2026-02-06 12:00 |
04:55:57.97 |
+36:28:20.9 |
HIP 22955 |
18.77 |
| 2026-02-07 00:00 |
04:55:56.51 |
+36:28:07.6 |
HIP 22955 |
18.63 |
| 2026-02-07 12:00 |
04:55:55.09 |
+36:27:54.4 |
HIP 22955 |
18.49 |
| 2026-02-08 00:00 |
04:55:53.69 |
+36:27:41.1 |
HIP 22955 |
18.36 |
| 2026-02-08 12:00 |
04:55:52.32 |
+36:27:27.8 |
HIP 22955 |
18.23 |
| 2026-02-09 00:00 |
04:55:50.99 |
+36:27:14.6 |
HIP 22955 |
18.11 |
| 2026-02-09 12:00 |
04:55:49.68 |
+36:27:01.3 |
HIP 22955 |
17.98 |
| 2026-02-10 00:00 |
04:55:48.40 |
+36:26:48.1 |
HIP 22955 |
17.87 |
| 2026-02-10 12:00 |
04:55:47.16 |
+36:26:34.8 |
HIP 22955 |
17.75 |
| 2026-02-11 00:00 |
04:55:45.94 |
+36:26:21.6 |
HIP 22955 |
17.64 |
| 2026-02-11 12:00 |
04:55:44.76 |
+36:26:08.3 |
HIP 22955 |
17.54 |
| 2026-02-12 00:00 |
04:55:43.61 |
+36:25:55.1 |
HIP 22955 |
17.43 |
| 2026-02-12 12:00 |
04:55:42.49 |
+36:25:41.9 |
HIP 22955 |
17.33 |
| 2026-02-13 00:00 |
04:55:41.40 |
+36:25:28.7 |
HIP 22955 |
17.23 |
| 2026-02-13 12:00 |
04:55:40.34 |
+36:25:15.5 |
HIP 22955 |
17.13 |
| 2026-02-14 00:00 |
04:55:39.31 |
+36:25:02.3 |
HIP 22955 |
17.04 |
| 2026-02-14 12:00 |
04:55:38.31 |
+36:24:49.1 |
HIP 22955 |
16.94 |
| 2026-02-15 00:00 |
04:55:37.35 |
+36:24:36.0 |
HIP 22955 |
16.85 |
| 2026-02-15 12:00 |
04:55:36.41 |
+36:24:22.8 |
HIP 22955 |
16.76 |
| 2026-02-16 00:00 |
04:55:35.51 |
+36:24:09.7 |
HIP 22955 |
16.68 |
| 2026-02-16 12:00 |
04:55:34.64 |
+36:23:56.6 |
HIP 22955 |
16.59 |
| 2026-02-17 00:00 |
04:55:33.80 |
+36:23:43.5 |
HIP 22955 |
16.50 |
| 2026-02-17 12:00 |
04:55:33.00 |
+36:23:30.4 |
HIP 22955 |
16.42 |
| 2026-02-18 00:00 |
04:55:32.22 |
+36:23:17.3 |
HIP 22955 |
16.33 |
| 2026-02-18 12:00 |
04:55:31.48 |
+36:23:04.3 |
HIP 22955 |
16.25 |
| 2026-02-19 00:00 |
04:55:30.77 |
+36:22:51.3 |
HIP 22955 |
16.16 |
| 2026-02-19 12:00 |
04:55:30.09 |
+36:22:38.3 |
HIP 22955 |
16.08 |
| 2026-02-20 00:00 |
04:55:29.44 |
+36:22:25.3 |
HIP 22955 |
15.99 |
| 2026-02-20 12:00 |
04:55:28.83 |
+36:22:12.4 |
HIP 22955 |
15.91 |
| 2026-02-21 00:00 |
04:55:28.24 |
+36:21:59.5 |
HIP 22955 |
15.82 |
| 2026-02-21 12:00 |
04:55:27.69 |
+36:21:46.6 |
HIP 22955 |
15.73 |
| 2026-02-22 00:00 |
04:55:27.17 |
+36:21:33.7 |
HIP 22955 |
15.65 |
| 2026-02-22 12:00 |
04:55:26.69 |
+36:21:20.9 |
HIP 22955 |
15.56 |
| 2026-02-23 00:00 |
04:55:26.23 |
+36:21:08.1 |
HIP 22955 |
15.47 |
| 2026-02-23 12:00 |
04:55:25.81 |
+36:20:55.3 |
HIP 22955 |
15.38 |
| 2026-02-24 00:00 |
04:55:25.42 |
+36:20:42.6 |
HIP 22955 |
15.29 |