204P/LINEAR-NEAT
メタデータ
| 項目 |
値 |
| Designation |
204P/LINEAR-NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-12-11T12:45:33.013440Z |
| Orbit solution date (soln_date, UTC) |
2024-05-07T15:48:38Z |
| Obs used |
1273 |
| NEO |
- |
| M1 |
15.300 |
| K1 |
7.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-11-28.0000000 |
| e |
0.47217310 |
| q (au) |
1.929928 |
| a (au) |
3.656366 |
| i (deg) |
6.588859 |
| Ω (om, deg) |
109.072895 |
| ω (w, deg) |
355.047711 |
| M (ma, deg) |
306.638046 |
等級
散乱 + 全体線形
$$
M_a = (13.380 + 4.629\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.380 |
| n |
4.629 |
| gf |
1.000 |
| gb |
-0.796 |
| k |
0.998 |
| 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 |
19:10:41.81 |
-21:44:43.6 |
HIP 94129 |
22.05 |
| 2026-02-03 12:00 |
19:11:06.60 |
-21:44:10.2 |
HIP 94338 |
17.93 |
| 2026-02-04 00:00 |
19:11:31.34 |
-21:43:36.7 |
HIP 94372 |
13.79 |
| 2026-02-04 12:00 |
19:11:56.01 |
-21:43:02.9 |
HIP 94372 |
8.24 |
| 2026-02-05 00:00 |
19:12:20.63 |
-21:42:29.1 |
HIP 94372 |
3.44 |
| 2026-02-05 12:00 |
19:12:45.19 |
-21:41:55.1 |
HIP 94372 |
4.66 |
| 2026-02-06 00:00 |
19:13:09.68 |
-21:41:20.9 |
HIP 94372 |
9.85 |
| 2026-02-06 12:00 |
19:13:34.12 |
-21:40:46.6 |
HIP 94372 |
15.41 |
| 2026-02-07 00:00 |
19:13:58.49 |
-21:40:12.2 |
HIP 94372 |
21.03 |
| 2026-02-07 12:00 |
19:14:22.80 |
-21:39:37.6 |
HIP 94510 |
24.23 |
| 2026-02-08 00:00 |
19:14:47.04 |
-21:39:02.9 |
HIP 94550 |
25.02 |
| 2026-02-08 12:00 |
19:15:11.22 |
-21:38:28.1 |
HIP 94550 |
25.58 |
| 2026-02-09 00:00 |
19:15:35.33 |
-21:37:53.2 |
HIP 94765 |
20.83 |
| 2026-02-09 12:00 |
19:15:59.38 |
-21:37:18.1 |
HIP 94765 |
15.54 |
| 2026-02-10 00:00 |
19:16:23.36 |
-21:36:43.0 |
HIP 94765 |
10.61 |
| 2026-02-10 12:00 |
19:16:47.27 |
-21:36:07.7 |
HIP 94765 |
6.82 |
| 2026-02-11 00:00 |
19:17:11.12 |
-21:35:32.4 |
HIP 94765 |
6.54 |
| 2026-02-11 12:00 |
19:17:34.89 |
-21:34:56.9 |
HIP 94765 |
10.05 |
| 2026-02-12 00:00 |
19:17:58.59 |
-21:34:21.3 |
HIP 94765 |
14.85 |
| 2026-02-12 12:00 |
19:18:22.22 |
-21:33:45.6 |
HIP 94765 |
20.02 |
| 2026-02-13 00:00 |
19:18:45.78 |
-21:33:09.9 |
HIP 94784 |
25.22 |
| 2026-02-13 12:00 |
19:19:09.26 |
-21:32:34.0 |
HIP 95105 |
24.21 |
| 2026-02-14 00:00 |
19:19:32.67 |
-21:31:58.1 |
HIP 95105 |
18.76 |
| 2026-02-14 12:00 |
19:19:56.00 |
-21:31:22.1 |
HIP 95105 |
13.36 |
| 2026-02-15 00:00 |
19:20:19.26 |
-21:30:46.1 |
HIP 95105 |
8.05 |
| 2026-02-15 12:00 |
19:20:42.44 |
-21:30:09.9 |
HIP 95105 |
3.21 |
| 2026-02-16 00:00 |
19:21:05.54 |
-21:29:33.7 |
HIP 95105 |
3.83 |
| 2026-02-16 12:00 |
19:21:28.57 |
-21:28:57.5 |
HIP 95105 |
8.79 |
| 2026-02-17 00:00 |
19:21:51.51 |
-21:28:21.1 |
HIP 95193 |
10.31 |
| 2026-02-17 12:00 |
19:22:14.37 |
-21:27:44.8 |
HIP 95193 |
11.94 |
| 2026-02-18 00:00 |
19:22:37.16 |
-21:27:08.3 |
HIP 95193 |
15.35 |
| 2026-02-18 12:00 |
19:22:59.85 |
-21:26:31.9 |
HIP 95193 |
19.62 |
| 2026-02-19 00:00 |
19:23:22.47 |
-21:25:55.4 |
HIP 95193 |
24.29 |
| 2026-02-19 12:00 |
19:23:45.00 |
-21:25:18.9 |
HIP 95193 |
29.16 |
| 2026-02-20 00:00 |
19:24:07.44 |
-21:24:42.3 |
HIP 95554 |
28.96 |
| 2026-02-20 12:00 |
19:24:29.80 |
-21:24:05.7 |
HIP 95554 |
24.21 |
| 2026-02-21 00:00 |
19:24:52.07 |
-21:23:29.1 |
HIP 95554 |
19.73 |
| 2026-02-21 12:00 |
19:25:14.26 |
-21:22:52.5 |
HIP 95554 |
15.72 |
| 2026-02-22 00:00 |
19:25:36.35 |
-21:22:15.9 |
HIP 95554 |
12.62 |
| 2026-02-22 12:00 |
19:25:58.36 |
-21:21:39.2 |
HIP 95577 |
9.70 |
| 2026-02-23 00:00 |
19:26:20.28 |
-21:21:02.6 |
HIP 95577 |
6.52 |
| 2026-02-23 12:00 |
19:26:42.10 |
-21:20:26.0 |
HIP 95577 |
6.60 |
| 2026-02-24 00:00 |
19:27:03.83 |
-21:19:49.3 |
HIP 95577 |
9.84 |