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) |
| 2026-03-26 00:00 |
10:32:06.74 |
+05:20:48.5 |
HIP 51493 |
16.41 |
| 2026-03-26 12:00 |
10:31:56.47 |
+05:22:13.4 |
HIP 51493 |
13.96 |
| 2026-03-27 00:00 |
10:31:46.28 |
+05:23:37.8 |
HIP 51493 |
11.75 |
| 2026-03-27 12:00 |
10:31:36.18 |
+05:25:01.9 |
HIP 51493 |
9.91 |
| 2026-03-28 00:00 |
10:31:26.17 |
+05:26:25.5 |
HIP 51493 |
8.67 |
| 2026-03-28 12:00 |
10:31:16.24 |
+05:27:48.7 |
HIP 51493 |
8.28 |
| 2026-03-29 00:00 |
10:31:06.41 |
+05:29:11.5 |
HIP 51493 |
8.82 |
| 2026-03-29 12:00 |
10:30:56.66 |
+05:30:33.8 |
HIP 51493 |
10.14 |
| 2026-03-30 00:00 |
10:30:47.01 |
+05:31:55.7 |
HIP 51493 |
11.95 |
| 2026-03-30 12:00 |
10:30:37.44 |
+05:33:17.1 |
HIP 51493 |
14.06 |
| 2026-03-31 00:00 |
10:30:27.97 |
+05:34:38.0 |
HIP 51493 |
16.34 |
| 2026-03-31 12:00 |
10:30:18.60 |
+05:35:58.4 |
HIP 51493 |
18.72 |
| 2026-04-01 00:00 |
10:30:09.32 |
+05:37:18.4 |
HIP 51493 |
21.15 |
| 2026-04-01 12:00 |
10:30:00.13 |
+05:38:37.9 |
HIP 51493 |
23.61 |
| 2026-04-02 00:00 |
10:29:51.04 |
+05:39:56.8 |
HIP 51280 |
22.70 |
| 2026-04-02 12:00 |
10:29:42.05 |
+05:41:15.3 |
HIP 51280 |
20.13 |
| 2026-04-03 00:00 |
10:29:33.16 |
+05:42:33.3 |
HIP 51280 |
17.59 |
| 2026-04-03 12:00 |
10:29:24.37 |
+05:43:50.7 |
HIP 51280 |
15.09 |
| 2026-04-04 00:00 |
10:29:15.68 |
+05:45:07.6 |
HIP 51280 |
12.63 |
| 2026-04-04 12:00 |
10:29:07.10 |
+05:46:24.0 |
HIP 51280 |
10.23 |
| 2026-04-05 00:00 |
10:28:58.61 |
+05:47:39.8 |
HIP 51280 |
7.90 |
| 2026-04-05 12:00 |
10:28:50.23 |
+05:48:55.1 |
HIP 51280 |
5.71 |
| 2026-04-06 00:00 |
10:28:41.96 |
+05:50:09.9 |
HIP 51280 |
3.85 |
| 2026-04-06 12:00 |
10:28:33.79 |
+05:51:24.1 |
HIP 51280 |
2.94 |
| 2026-04-07 00:00 |
10:28:25.72 |
+05:52:37.7 |
HIP 51280 |
3.70 |
| 2026-04-07 12:00 |
10:28:17.76 |
+05:53:50.7 |
HIP 51280 |
5.44 |
| 2026-04-08 00:00 |
10:28:09.92 |
+05:55:03.2 |
HIP 51280 |
7.48 |
| 2026-04-08 12:00 |
10:28:02.18 |
+05:56:15.1 |
HIP 51280 |
9.61 |
| 2026-04-09 00:00 |
10:27:54.55 |
+05:57:26.4 |
HIP 51280 |
11.76 |
| 2026-04-09 12:00 |
10:27:47.03 |
+05:58:37.1 |
HIP 51280 |
13.92 |
| 2026-04-10 00:00 |
10:27:39.62 |
+05:59:47.1 |
HIP 51122 |
15.29 |
| 2026-04-10 12:00 |
10:27:32.32 |
+06:00:56.6 |
HIP 51122 |
13.29 |
| 2026-04-11 00:00 |
10:27:25.14 |
+06:02:05.5 |
HIP 51122 |
11.37 |
| 2026-04-11 12:00 |
10:27:18.07 |
+06:03:13.8 |
HIP 51122 |
9.57 |
| 2026-04-12 00:00 |
10:27:11.12 |
+06:04:21.4 |
HIP 51122 |
7.93 |
| 2026-04-12 12:00 |
10:27:04.28 |
+06:05:28.4 |
HIP 51122 |
6.57 |
| 2026-04-13 00:00 |
10:26:57.55 |
+06:06:34.7 |
HIP 51122 |
5.64 |
| 2026-04-13 12:00 |
10:26:50.95 |
+06:07:40.4 |
HIP 51122 |
5.35 |
| 2026-04-14 00:00 |
10:26:44.46 |
+06:08:45.5 |
HIP 51122 |
5.76 |
| 2026-04-14 12:00 |
10:26:38.08 |
+06:09:49.9 |
HIP 51122 |
6.72 |
| 2026-04-15 00:00 |
10:26:31.83 |
+06:10:53.7 |
HIP 51122 |
8.00 |
| 2026-04-15 12:00 |
10:26:25.70 |
+06:11:56.7 |
HIP 51122 |
9.47 |
| 2026-04-16 00:00 |
10:26:19.68 |
+06:12:59.2 |
HIP 51122 |
11.03 |