C/2003 H3 (NEAT)
メタデータ
| 項目 |
値 |
| Designation |
C/2003 H3 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-04-24T05:32:24.740160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:29Z |
| Obs used |
765 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
5.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2003-08-01.0000000 |
| e |
0.99978175 |
| q (au) |
2.901439 |
| a (au) |
13294.090063 |
| i (deg) |
42.811675 |
| Ω (om, deg) |
269.417235 |
| ω (w, deg) |
6.477416 |
| M (ma, deg) |
0.000064 |
等級
散乱 + 全体線形
$$
M_a = (13.461 + 2.567\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.461 |
| n |
2.567 |
| gf |
1.000 |
| gb |
-0.709 |
| 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 |
04:22:46.94 |
+37:51:37.1 |
HIP 20452 |
5.62 |
| 2026-02-03 12:00 |
04:22:45.69 |
+37:51:22.2 |
HIP 20452 |
5.92 |
| 2026-02-04 00:00 |
04:22:44.47 |
+37:51:07.4 |
HIP 20452 |
6.23 |
| 2026-02-04 12:00 |
04:22:43.27 |
+37:50:52.5 |
HIP 20452 |
6.53 |
| 2026-02-05 00:00 |
04:22:42.11 |
+37:50:37.7 |
HIP 20452 |
6.84 |
| 2026-02-05 12:00 |
04:22:40.97 |
+37:50:22.9 |
HIP 20452 |
7.15 |
| 2026-02-06 00:00 |
04:22:39.87 |
+37:50:08.1 |
HIP 20452 |
7.46 |
| 2026-02-06 12:00 |
04:22:38.79 |
+37:49:53.4 |
HIP 20452 |
7.76 |
| 2026-02-07 00:00 |
04:22:37.74 |
+37:49:38.6 |
HIP 20452 |
8.07 |
| 2026-02-07 12:00 |
04:22:36.72 |
+37:49:23.9 |
HIP 20452 |
8.37 |
| 2026-02-08 00:00 |
04:22:35.73 |
+37:49:09.3 |
HIP 20452 |
8.68 |
| 2026-02-08 12:00 |
04:22:34.78 |
+37:48:54.6 |
HIP 20452 |
8.98 |
| 2026-02-09 00:00 |
04:22:33.85 |
+37:48:40.0 |
HIP 20452 |
9.27 |
| 2026-02-09 12:00 |
04:22:32.95 |
+37:48:25.4 |
HIP 20452 |
9.57 |
| 2026-02-10 00:00 |
04:22:32.08 |
+37:48:10.8 |
HIP 20452 |
9.86 |
| 2026-02-10 12:00 |
04:22:31.24 |
+37:47:56.3 |
HIP 20452 |
10.15 |
| 2026-02-11 00:00 |
04:22:30.43 |
+37:47:41.8 |
HIP 20452 |
10.44 |
| 2026-02-11 12:00 |
04:22:29.66 |
+37:47:27.4 |
HIP 20452 |
10.72 |
| 2026-02-12 00:00 |
04:22:28.91 |
+37:47:12.9 |
HIP 20452 |
11.00 |
| 2026-02-12 12:00 |
04:22:28.19 |
+37:46:58.5 |
HIP 20452 |
11.28 |
| 2026-02-13 00:00 |
04:22:27.50 |
+37:46:44.2 |
HIP 20452 |
11.56 |
| 2026-02-13 12:00 |
04:22:26.85 |
+37:46:29.9 |
HIP 20452 |
11.83 |
| 2026-02-14 00:00 |
04:22:26.22 |
+37:46:15.6 |
HIP 20452 |
12.10 |
| 2026-02-14 12:00 |
04:22:25.62 |
+37:46:01.4 |
HIP 20452 |
12.36 |
| 2026-02-15 00:00 |
04:22:25.06 |
+37:45:47.2 |
HIP 20452 |
12.62 |
| 2026-02-15 12:00 |
04:22:24.52 |
+37:45:33.1 |
HIP 20452 |
12.88 |
| 2026-02-16 00:00 |
04:22:24.02 |
+37:45:19.0 |
HIP 20452 |
13.13 |
| 2026-02-16 12:00 |
04:22:23.55 |
+37:45:04.9 |
HIP 20452 |
13.39 |
| 2026-02-17 00:00 |
04:22:23.10 |
+37:44:50.9 |
HIP 20452 |
13.63 |
| 2026-02-17 12:00 |
04:22:22.69 |
+37:44:36.9 |
HIP 20452 |
13.88 |
| 2026-02-18 00:00 |
04:22:22.31 |
+37:44:23.0 |
HIP 20452 |
14.12 |
| 2026-02-18 12:00 |
04:22:21.96 |
+37:44:09.2 |
HIP 20452 |
14.36 |
| 2026-02-19 00:00 |
04:22:21.64 |
+37:43:55.3 |
HIP 20452 |
14.59 |
| 2026-02-19 12:00 |
04:22:21.35 |
+37:43:41.6 |
HIP 20452 |
14.83 |
| 2026-02-20 00:00 |
04:22:21.09 |
+37:43:27.9 |
HIP 20452 |
15.05 |
| 2026-02-20 12:00 |
04:22:20.86 |
+37:43:14.2 |
HIP 20452 |
15.28 |
| 2026-02-21 00:00 |
04:22:20.67 |
+37:43:00.6 |
HIP 20452 |
15.50 |
| 2026-02-21 12:00 |
04:22:20.50 |
+37:42:47.1 |
HIP 20452 |
15.72 |
| 2026-02-22 00:00 |
04:22:20.36 |
+37:42:33.6 |
HIP 20452 |
15.94 |
| 2026-02-22 12:00 |
04:22:20.26 |
+37:42:20.1 |
HIP 20452 |
16.15 |
| 2026-02-23 00:00 |
04:22:20.18 |
+37:42:06.8 |
HIP 20452 |
16.36 |
| 2026-02-23 12:00 |
04:22:20.14 |
+37:41:53.4 |
HIP 20452 |
16.57 |
| 2026-02-24 00:00 |
04:22:20.12 |
+37:41:40.2 |
HIP 20452 |
16.77 |