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) |
| 2026-09-20 00:00 |
04:36:32.82 |
+38:01:29.3 |
HIP 21565 |
14.79 |
| 2026-09-20 12:00 |
04:36:31.96 |
+38:01:37.1 |
HIP 21565 |
14.91 |
| 2026-09-21 00:00 |
04:36:31.06 |
+38:01:44.9 |
HIP 21565 |
15.05 |
| 2026-09-21 12:00 |
04:36:30.14 |
+38:01:52.7 |
HIP 21565 |
15.19 |
| 2026-09-22 00:00 |
04:36:29.19 |
+38:02:00.3 |
HIP 21565 |
15.34 |
| 2026-09-22 12:00 |
04:36:28.22 |
+38:02:07.9 |
HIP 21565 |
15.49 |
| 2026-09-23 00:00 |
04:36:27.21 |
+38:02:15.4 |
HIP 21565 |
15.65 |
| 2026-09-23 12:00 |
04:36:26.18 |
+38:02:22.8 |
HIP 21565 |
15.82 |
| 2026-09-24 00:00 |
04:36:25.12 |
+38:02:30.2 |
HIP 21565 |
16.00 |
| 2026-09-24 12:00 |
04:36:24.03 |
+38:02:37.5 |
HIP 21565 |
16.19 |
| 2026-09-25 00:00 |
04:36:22.91 |
+38:02:44.7 |
HIP 21565 |
16.38 |
| 2026-09-25 12:00 |
04:36:21.77 |
+38:02:51.8 |
HIP 21565 |
16.58 |
| 2026-09-26 00:00 |
04:36:20.60 |
+38:02:58.9 |
HIP 21565 |
16.79 |
| 2026-09-26 12:00 |
04:36:19.40 |
+38:03:05.8 |
HIP 21565 |
17.00 |
| 2026-09-27 00:00 |
04:36:18.17 |
+38:03:12.7 |
HIP 21565 |
17.22 |
| 2026-09-27 12:00 |
04:36:16.91 |
+38:03:19.5 |
HIP 21565 |
17.45 |
| 2026-09-28 00:00 |
04:36:15.63 |
+38:03:26.2 |
HIP 21565 |
17.68 |
| 2026-09-28 12:00 |
04:36:14.32 |
+38:03:32.9 |
HIP 21565 |
17.92 |
| 2026-09-29 00:00 |
04:36:12.98 |
+38:03:39.4 |
HIP 21565 |
18.17 |
| 2026-09-29 12:00 |
04:36:11.62 |
+38:03:45.9 |
HIP 21565 |
18.42 |
| 2026-09-30 00:00 |
04:36:10.23 |
+38:03:52.3 |
HIP 21565 |
18.69 |
| 2026-09-30 12:00 |
04:36:08.81 |
+38:03:58.6 |
HIP 21565 |
18.95 |
| 2026-10-01 00:00 |
04:36:07.36 |
+38:04:04.8 |
HIP 21565 |
19.23 |
| 2026-10-01 12:00 |
04:36:05.89 |
+38:04:11.0 |
HIP 21565 |
19.51 |
| 2026-10-02 00:00 |
04:36:04.39 |
+38:04:17.0 |
HIP 21565 |
19.79 |
| 2026-10-02 12:00 |
04:36:02.86 |
+38:04:23.0 |
HIP 21565 |
20.08 |
| 2026-10-03 00:00 |
04:36:01.31 |
+38:04:28.9 |
HIP 21565 |
20.38 |
| 2026-10-03 12:00 |
04:35:59.73 |
+38:04:34.6 |
HIP 21565 |
20.68 |
| 2026-10-04 00:00 |
04:35:58.12 |
+38:04:40.3 |
HIP 21565 |
20.99 |
| 2026-10-04 12:00 |
04:35:56.49 |
+38:04:45.9 |
HIP 21565 |
21.31 |
| 2026-10-05 00:00 |
04:35:54.83 |
+38:04:51.4 |
HIP 21565 |
21.63 |
| 2026-10-05 12:00 |
04:35:53.15 |
+38:04:56.9 |
HIP 21565 |
21.96 |
| 2026-10-06 00:00 |
04:35:51.44 |
+38:05:02.2 |
HIP 21565 |
22.29 |
| 2026-10-06 12:00 |
04:35:49.70 |
+38:05:07.4 |
HIP 21565 |
22.63 |
| 2026-10-07 00:00 |
04:35:47.94 |
+38:05:12.6 |
HIP 21565 |
22.97 |
| 2026-10-07 12:00 |
04:35:46.15 |
+38:05:17.6 |
HIP 21565 |
23.32 |
| 2026-10-08 00:00 |
04:35:44.33 |
+38:05:22.5 |
HIP 21565 |
23.68 |
| 2026-10-08 12:00 |
04:35:42.50 |
+38:05:27.4 |
HIP 21565 |
24.04 |
| 2026-10-09 00:00 |
04:35:40.63 |
+38:05:32.1 |
HIP 21565 |
24.41 |
| 2026-10-09 12:00 |
04:35:38.74 |
+38:05:36.8 |
HIP 21565 |
24.78 |
| 2026-10-10 00:00 |
04:35:36.82 |
+38:05:41.3 |
HIP 21565 |
25.15 |
| 2026-10-10 12:00 |
04:35:34.88 |
+38:05:45.8 |
HIP 21565 |
25.53 |
| 2026-10-11 00:00 |
04:35:32.92 |
+38:05:50.2 |
HIP 21565 |
25.92 |