116P/Wild 4
メタデータ
| 項目 |
値 |
| Designation |
116P/Wild 4 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-01-11T12:37:31.860480Z |
| Orbit solution date (soln_date, UTC) |
2024-09-13T12:15:05Z |
| Obs used |
4667 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
17.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-04-16.0000000 |
| e |
0.37227703 |
| q (au) |
2.187086 |
| a (au) |
3.484158 |
| i (deg) |
3.607844 |
| Ω (om, deg) |
20.991856 |
| ω (w, deg) |
173.310727 |
| M (ma, deg) |
14.469123 |
等級
散乱 + 全体線形
$$
M_a = (7.719 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.719 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.869 |
| k |
0.999 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2020-12-05 |
2024-09-04 |
+8.4809 |
-3.481 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
00:44:23.93 |
+04:51:14.0 |
HIP 3534 |
22.11 |
| 2026-02-03 12:00 |
00:44:42.27 |
+04:53:18.4 |
HIP 3534 |
18.44 |
| 2026-02-04 00:00 |
00:45:00.73 |
+04:55:23.3 |
HIP 3534 |
15.54 |
| 2026-02-04 12:00 |
00:45:19.30 |
+04:57:28.9 |
HIP 3534 |
13.92 |
| 2026-02-05 00:00 |
00:45:37.98 |
+04:59:35.2 |
HIP 3534 |
14.06 |
| 2026-02-05 12:00 |
00:45:56.77 |
+05:01:42.0 |
HIP 3534 |
15.95 |
| 2026-02-06 00:00 |
00:46:15.66 |
+05:03:49.5 |
HIP 3658 |
16.10 |
| 2026-02-06 12:00 |
00:46:34.67 |
+05:05:57.5 |
HIP 3651 |
15.00 |
| 2026-02-07 00:00 |
00:46:53.77 |
+05:08:06.2 |
HIP 3651 |
12.84 |
| 2026-02-07 12:00 |
00:47:12.98 |
+05:10:15.5 |
HIP 3651 |
12.62 |
| 2026-02-08 00:00 |
00:47:32.30 |
+05:12:25.4 |
HIP 3743 |
9.74 |
| 2026-02-08 12:00 |
00:47:51.72 |
+05:14:35.8 |
HIP 3765 |
8.04 |
| 2026-02-09 00:00 |
00:48:11.24 |
+05:16:46.9 |
HIP 3765 |
2.82 |
| 2026-02-09 12:00 |
00:48:30.87 |
+05:18:58.5 |
HIP 3765 |
2.86 |
| 2026-02-10 00:00 |
00:48:50.59 |
+05:21:10.7 |
HIP 3829 |
5.27 |
| 2026-02-10 12:00 |
00:49:10.42 |
+05:23:23.4 |
HIP 3829 |
0.45 |
| 2026-02-11 00:00 |
00:49:30.35 |
+05:25:36.8 |
HIP 3829 |
5.60 |
| 2026-02-11 12:00 |
00:49:50.37 |
+05:27:50.6 |
HIP 3829 |
11.05 |
| 2026-02-12 00:00 |
00:50:10.49 |
+05:30:05.0 |
HIP 3829 |
16.54 |
| 2026-02-12 12:00 |
00:50:30.71 |
+05:32:20.0 |
HIP 4014 |
20.84 |
| 2026-02-13 00:00 |
00:50:51.03 |
+05:34:35.5 |
HIP 4014 |
15.87 |
| 2026-02-13 12:00 |
00:51:11.44 |
+05:36:51.5 |
HIP 4014 |
11.41 |
| 2026-02-14 00:00 |
00:51:31.95 |
+05:39:08.0 |
HIP 4014 |
8.38 |
| 2026-02-14 12:00 |
00:51:52.55 |
+05:41:25.1 |
HIP 4014 |
8.54 |
| 2026-02-15 00:00 |
00:52:13.24 |
+05:43:42.7 |
HIP 4014 |
11.79 |
| 2026-02-15 12:00 |
00:52:34.03 |
+05:46:00.7 |
HIP 4014 |
16.41 |
| 2026-02-16 00:00 |
00:52:54.91 |
+05:48:19.3 |
HIP 4231 |
15.74 |
| 2026-02-16 12:00 |
00:53:15.88 |
+05:50:38.4 |
HIP 4231 |
10.73 |
| 2026-02-17 00:00 |
00:53:36.94 |
+05:52:57.9 |
HIP 4231 |
6.89 |
| 2026-02-17 12:00 |
00:53:58.08 |
+05:55:17.9 |
HIP 4231 |
6.75 |
| 2026-02-18 00:00 |
00:54:19.32 |
+05:57:38.4 |
HIP 4231 |
10.50 |
| 2026-02-18 12:00 |
00:54:40.64 |
+05:59:59.4 |
HIP 4231 |
15.56 |
| 2026-02-19 00:00 |
00:55:02.05 |
+06:02:20.8 |
HIP 4231 |
21.03 |
| 2026-02-19 12:00 |
00:55:23.55 |
+06:04:42.7 |
HIP 4231 |
26.67 |
| 2026-02-20 00:00 |
00:55:45.12 |
+06:07:05.0 |
HIP 4231 |
32.41 |
| 2026-02-20 12:00 |
00:56:06.79 |
+06:09:27.8 |
HIP 4518 |
31.71 |
| 2026-02-21 00:00 |
00:56:28.53 |
+06:11:51.0 |
HIP 4518 |
28.88 |
| 2026-02-21 12:00 |
00:56:50.36 |
+06:14:14.6 |
HIP 4518 |
27.05 |
| 2026-02-22 00:00 |
00:57:12.27 |
+06:16:38.6 |
HIP 4518 |
26.46 |
| 2026-02-22 12:00 |
00:57:34.26 |
+06:19:03.0 |
HIP 4518 |
27.19 |
| 2026-02-23 00:00 |
00:57:56.33 |
+06:21:27.9 |
HIP 4655 |
29.15 |
| 2026-02-23 12:00 |
00:58:18.47 |
+06:23:53.1 |
HIP 4655 |
23.22 |
| 2026-02-24 00:00 |
00:58:40.70 |
+06:26:18.8 |
HIP 4655 |
17.34 |