メタデータ
| 項目 |
値 |
| Designation |
142P/Ge-Wang |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-05-30T02:38:24.838080Z |
| Orbit solution date (soln_date, UTC) |
2024-02-01T12:22:34Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
15.400 |
| K1 |
7.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-04-21.0000000 |
| e |
0.49914641 |
| q (au) |
2.487408 |
| a (au) |
4.966337 |
| i (deg) |
12.307409 |
| Ω (om, deg) |
176.518490 |
| ω (w, deg) |
175.630058 |
| M (ma, deg) |
29.021568 |
等級
散乱 + 全体線形
$$
M_a = (14.996 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.996 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-05-12 00:00 |
10:24:00.15 |
+06:50:24.4 |
HIP 50851 |
23.19 |
| 2026-05-12 12:00 |
10:24:00.84 |
+06:50:47.6 |
HIP 50851 |
23.60 |
| 2026-05-13 00:00 |
10:24:01.65 |
+06:51:10.0 |
HIP 50851 |
24.01 |
| 2026-05-13 12:00 |
10:24:02.59 |
+06:51:31.6 |
HIP 50851 |
24.44 |
| 2026-05-14 00:00 |
10:24:03.66 |
+06:51:52.5 |
HIP 50851 |
24.88 |
| 2026-05-14 12:00 |
10:24:04.85 |
+06:52:12.6 |
HIP 50851 |
25.32 |
| 2026-05-15 00:00 |
10:24:06.17 |
+06:52:31.9 |
HIP 50851 |
25.78 |
| 2026-05-15 12:00 |
10:24:07.61 |
+06:52:50.5 |
HIP 50851 |
26.25 |
| 2026-05-16 00:00 |
10:24:09.18 |
+06:53:08.2 |
HIP 50851 |
26.72 |
| 2026-05-16 12:00 |
10:24:10.88 |
+06:53:25.2 |
HIP 51058 |
26.38 |
| 2026-05-17 00:00 |
10:24:12.70 |
+06:53:41.5 |
HIP 51058 |
25.95 |
| 2026-05-17 12:00 |
10:24:14.64 |
+06:53:56.9 |
HIP 51058 |
25.49 |
| 2026-05-18 00:00 |
10:24:16.71 |
+06:54:11.6 |
HIP 51058 |
25.01 |
| 2026-05-18 12:00 |
10:24:18.90 |
+06:54:25.6 |
HIP 51058 |
24.49 |
| 2026-05-19 00:00 |
10:24:21.22 |
+06:54:38.7 |
HIP 51058 |
23.95 |
| 2026-05-19 12:00 |
10:24:23.66 |
+06:54:51.1 |
HIP 51058 |
23.38 |
| 2026-05-20 00:00 |
10:24:26.22 |
+06:55:02.7 |
HIP 51058 |
22.78 |
| 2026-05-20 12:00 |
10:24:28.90 |
+06:55:13.6 |
HIP 51058 |
22.15 |
| 2026-05-21 00:00 |
10:24:31.71 |
+06:55:23.7 |
HIP 51058 |
21.50 |
| 2026-05-21 12:00 |
10:24:34.64 |
+06:55:33.1 |
HIP 51058 |
20.81 |
| 2026-05-22 00:00 |
10:24:37.68 |
+06:55:41.6 |
HIP 51058 |
20.10 |
| 2026-05-22 12:00 |
10:24:40.85 |
+06:55:49.5 |
HIP 51058 |
19.36 |
| 2026-05-23 00:00 |
10:24:44.14 |
+06:55:56.5 |
HIP 51058 |
18.59 |
| 2026-05-23 12:00 |
10:24:47.55 |
+06:56:02.9 |
HIP 51058 |
17.80 |
| 2026-05-24 00:00 |
10:24:51.08 |
+06:56:08.4 |
HIP 51058 |
16.98 |
| 2026-05-24 12:00 |
10:24:54.73 |
+06:56:13.3 |
HIP 51058 |
16.13 |
| 2026-05-25 00:00 |
10:24:58.49 |
+06:56:17.3 |
HIP 51058 |
15.26 |
| 2026-05-25 12:00 |
10:25:02.38 |
+06:56:20.7 |
HIP 51058 |
14.37 |
| 2026-05-26 00:00 |
10:25:06.38 |
+06:56:23.3 |
HIP 51058 |
13.45 |
| 2026-05-26 12:00 |
10:25:10.49 |
+06:56:25.1 |
HIP 51058 |
12.52 |
| 2026-05-27 00:00 |
10:25:14.73 |
+06:56:26.2 |
HIP 51058 |
11.57 |
| 2026-05-27 12:00 |
10:25:19.08 |
+06:56:26.6 |
HIP 51058 |
10.61 |
| 2026-05-28 00:00 |
10:25:23.54 |
+06:56:26.2 |
HIP 51058 |
9.64 |
| 2026-05-28 12:00 |
10:25:28.12 |
+06:56:25.1 |
HIP 51058 |
8.67 |
| 2026-05-29 00:00 |
10:25:32.81 |
+06:56:23.3 |
HIP 51058 |
7.72 |
| 2026-05-29 12:00 |
10:25:37.62 |
+06:56:20.8 |
HIP 51058 |
6.81 |
| 2026-05-30 00:00 |
10:25:42.54 |
+06:56:17.5 |
HIP 51058 |
5.97 |
| 2026-05-30 12:00 |
10:25:47.57 |
+06:56:13.5 |
HIP 51058 |
5.26 |
| 2026-05-31 00:00 |
10:25:52.72 |
+06:56:08.8 |
HIP 51058 |
4.76 |
| 2026-05-31 12:00 |
10:25:57.98 |
+06:56:03.4 |
HIP 51058 |
4.57 |
| 2026-06-01 00:00 |
10:26:03.34 |
+06:55:57.2 |
HIP 51058 |
4.74 |
| 2026-06-01 12:00 |
10:26:08.82 |
+06:55:50.3 |
HIP 51058 |
5.26 |
| 2026-06-02 00:00 |
10:26:14.41 |
+06:55:42.7 |
HIP 51058 |
6.06 |