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 |
0.999 |
| gb |
-0.501 |
| 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) |
| 2026-06-01 00:00 |
05:02:30.90 |
+36:00:30.1 |
HIP 23427 |
6.76 |
| 2026-06-01 12:00 |
05:02:34.66 |
+36:00:31.8 |
HIP 23427 |
7.35 |
| 2026-06-02 00:00 |
05:02:38.42 |
+36:00:33.6 |
HIP 23427 |
7.96 |
| 2026-06-02 12:00 |
05:02:42.18 |
+36:00:35.4 |
HIP 23427 |
8.61 |
| 2026-06-03 00:00 |
05:02:45.95 |
+36:00:37.3 |
HIP 23427 |
9.27 |
| 2026-06-03 12:00 |
05:02:49.72 |
+36:00:39.3 |
HIP 23427 |
9.94 |
| 2026-06-04 00:00 |
05:02:53.49 |
+36:00:41.4 |
HIP 23427 |
10.63 |
| 2026-06-04 12:00 |
05:02:57.26 |
+36:00:43.5 |
HIP 23427 |
11.33 |
| 2026-06-05 00:00 |
05:03:01.03 |
+36:00:45.7 |
HIP 23427 |
12.04 |
| 2026-06-05 12:00 |
05:03:04.81 |
+36:00:48.0 |
HIP 23427 |
12.75 |
| 2026-06-06 00:00 |
05:03:08.58 |
+36:00:50.4 |
HIP 23427 |
13.47 |
| 2026-06-06 12:00 |
05:03:12.36 |
+36:00:52.9 |
HIP 23427 |
14.20 |
| 2026-06-07 00:00 |
05:03:16.14 |
+36:00:55.4 |
HIP 23427 |
14.93 |
| 2026-06-07 12:00 |
05:03:19.91 |
+36:00:58.0 |
HIP 23427 |
15.66 |
| 2026-06-08 00:00 |
05:03:23.69 |
+36:01:00.7 |
HIP 23427 |
16.40 |
| 2026-06-08 12:00 |
05:03:27.47 |
+36:01:03.4 |
HIP 23427 |
17.14 |
| 2026-06-09 00:00 |
05:03:31.24 |
+36:01:06.2 |
HIP 23427 |
17.88 |
| 2026-06-09 12:00 |
05:03:35.02 |
+36:01:09.1 |
HIP 23427 |
18.63 |
| 2026-06-10 00:00 |
05:03:38.79 |
+36:01:12.1 |
HIP 23427 |
19.37 |
| 2026-06-10 12:00 |
05:03:42.57 |
+36:01:15.2 |
HIP 23427 |
20.12 |
| 2026-06-11 00:00 |
05:03:46.34 |
+36:01:18.3 |
HIP 23427 |
20.87 |
| 2026-06-11 12:00 |
05:03:50.11 |
+36:01:21.5 |
HIP 23427 |
21.62 |
| 2026-06-12 00:00 |
05:03:53.88 |
+36:01:24.8 |
HIP 23427 |
22.37 |
| 2026-06-12 12:00 |
05:03:57.65 |
+36:01:28.1 |
HIP 23427 |
23.13 |
| 2026-06-13 00:00 |
05:04:01.42 |
+36:01:31.5 |
HIP 23427 |
23.88 |
| 2026-06-13 12:00 |
05:04:05.18 |
+36:01:35.0 |
HIP 23709 |
23.68 |
| 2026-06-14 00:00 |
05:04:08.94 |
+36:01:38.5 |
HIP 23709 |
23.03 |
| 2026-06-14 12:00 |
05:04:12.70 |
+36:01:42.2 |
HIP 23709 |
22.39 |
| 2026-06-15 00:00 |
05:04:16.46 |
+36:01:45.9 |
HIP 23709 |
21.76 |
| 2026-06-15 12:00 |
05:04:20.21 |
+36:01:49.6 |
HIP 23709 |
21.14 |
| 2026-06-16 00:00 |
05:04:23.96 |
+36:01:53.5 |
HIP 23724 |
20.43 |
| 2026-06-16 12:00 |
05:04:27.70 |
+36:01:57.4 |
HIP 23724 |
19.72 |
| 2026-06-17 00:00 |
05:04:31.44 |
+36:02:01.4 |
HIP 23724 |
19.02 |
| 2026-06-17 12:00 |
05:04:35.18 |
+36:02:05.4 |
HIP 23724 |
18.32 |
| 2026-06-18 00:00 |
05:04:38.91 |
+36:02:09.5 |
HIP 23724 |
17.64 |
| 2026-06-18 12:00 |
05:04:42.63 |
+36:02:13.7 |
HIP 23724 |
16.95 |
| 2026-06-19 00:00 |
05:04:46.35 |
+36:02:18.0 |
HIP 23724 |
16.28 |
| 2026-06-19 12:00 |
05:04:50.07 |
+36:02:22.3 |
HIP 23724 |
15.61 |
| 2026-06-20 00:00 |
05:04:53.78 |
+36:02:26.7 |
HIP 23724 |
14.96 |
| 2026-06-20 12:00 |
05:04:57.48 |
+36:02:31.2 |
HIP 23724 |
14.31 |
| 2026-06-21 00:00 |
05:05:01.18 |
+36:02:35.7 |
HIP 23724 |
13.68 |
| 2026-06-21 12:00 |
05:05:04.87 |
+36:02:40.3 |
HIP 23724 |
13.06 |
| 2026-06-22 00:00 |
05:05:08.56 |
+36:02:44.9 |
HIP 23724 |
12.46 |