メタデータ
| 項目 |
値 |
| Designation |
134P/Kowal-Vavrova |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-05-21T10:44:38.575680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:27:38Z |
| Obs used |
1061 |
| NEO |
- |
| M1 |
5.300 |
| K1 |
21.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-07-03.0000000 |
| e |
0.58715335 |
| q (au) |
2.571725 |
| a (au) |
6.229249 |
| i (deg) |
4.348711 |
| Ω (om, deg) |
202.123430 |
| ω (w, deg) |
18.560225 |
| M (ma, deg) |
339.558643 |
等級
散乱 + 全体線形
$$
M_a = (8.233 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.233 |
| n |
6.000 |
| gf |
0.888 |
| gb |
-0.500 |
| k |
0.907 |
| δ90 |
1.569 |
| 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 |
| 2013-01-17 |
2013-08-04 |
+16.7678 |
-10.380 |
| 2013-08-04 |
2014-05-21 |
-10.4881 |
+4.217 |
| 2014-05-21 |
2015-09-08 |
+8.7935 |
-3.959 |
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) |
| 2026-03-26 00:00 |
04:31:18.98 |
+18:30:55.2 |
HIP 21089 |
18.41 |
| 2026-03-26 12:00 |
04:31:28.73 |
+18:31:24.9 |
HIP 21089 |
18.32 |
| 2026-03-27 00:00 |
04:31:38.59 |
+18:31:54.7 |
HIP 21089 |
18.55 |
| 2026-03-27 12:00 |
04:31:48.54 |
+18:32:24.6 |
HIP 21089 |
19.08 |
| 2026-03-28 00:00 |
04:31:58.59 |
+18:32:54.6 |
HIP 21089 |
19.90 |
| 2026-03-28 12:00 |
04:32:08.75 |
+18:33:24.7 |
HIP 21173 |
20.67 |
| 2026-03-29 00:00 |
04:32:19.00 |
+18:33:55.0 |
HIP 21173 |
20.95 |
| 2026-03-29 12:00 |
04:32:29.35 |
+18:34:25.3 |
HIP 21173 |
21.53 |
| 2026-03-30 00:00 |
04:32:39.80 |
+18:34:55.8 |
HIP 21173 |
22.38 |
| 2026-03-30 12:00 |
04:32:50.34 |
+18:35:26.3 |
HIP 21173 |
23.48 |
| 2026-03-31 00:00 |
04:33:00.98 |
+18:35:57.0 |
HIP 21173 |
24.81 |
| 2026-03-31 12:00 |
04:33:11.71 |
+18:36:27.7 |
HIP 21261 |
25.41 |
| 2026-04-01 00:00 |
04:33:22.54 |
+18:36:58.6 |
HIP 21261 |
24.30 |
| 2026-04-01 12:00 |
04:33:33.46 |
+18:37:29.5 |
HIP 21350 |
22.67 |
| 2026-04-02 00:00 |
04:33:44.48 |
+18:38:00.6 |
HIP 21350 |
20.88 |
| 2026-04-02 12:00 |
04:33:55.59 |
+18:38:31.7 |
HIP 21350 |
19.28 |
| 2026-04-03 00:00 |
04:34:06.79 |
+18:39:02.9 |
HIP 21350 |
17.93 |
| 2026-04-03 12:00 |
04:34:18.09 |
+18:39:34.2 |
HIP 21350 |
16.89 |
| 2026-04-04 00:00 |
04:34:29.47 |
+18:40:05.6 |
HIP 21350 |
16.25 |
| 2026-04-04 12:00 |
04:34:40.95 |
+18:40:37.0 |
HIP 21350 |
16.06 |
| 2026-04-05 00:00 |
04:34:52.51 |
+18:41:08.5 |
HIP 21350 |
16.34 |
| 2026-04-05 12:00 |
04:35:04.17 |
+18:41:40.1 |
HIP 21350 |
17.08 |
| 2026-04-06 00:00 |
04:35:15.91 |
+18:42:11.8 |
HIP 21350 |
18.24 |
| 2026-04-06 12:00 |
04:35:27.75 |
+18:42:43.5 |
HIP 21467 |
16.76 |
| 2026-04-07 00:00 |
04:35:39.67 |
+18:43:15.3 |
HIP 21467 |
13.88 |
| 2026-04-07 12:00 |
04:35:51.68 |
+18:43:47.1 |
HIP 21467 |
11.00 |
| 2026-04-08 00:00 |
04:36:03.77 |
+18:44:19.0 |
HIP 21467 |
8.09 |
| 2026-04-08 12:00 |
04:36:15.95 |
+18:44:51.0 |
HIP 21467 |
5.16 |
| 2026-04-09 00:00 |
04:36:28.22 |
+18:45:23.0 |
HIP 21467 |
2.24 |
| 2026-04-09 12:00 |
04:36:40.57 |
+18:45:55.0 |
HIP 21467 |
0.92 |
| 2026-04-10 00:00 |
04:36:53.00 |
+18:46:27.1 |
HIP 21467 |
3.81 |
| 2026-04-10 12:00 |
04:37:05.52 |
+18:46:59.3 |
HIP 21467 |
6.80 |
| 2026-04-11 00:00 |
04:37:18.13 |
+18:47:31.5 |
HIP 21467 |
9.83 |
| 2026-04-11 12:00 |
04:37:30.81 |
+18:48:03.7 |
HIP 21467 |
12.88 |
| 2026-04-12 00:00 |
04:37:43.58 |
+18:48:35.9 |
HIP 21621 |
12.13 |
| 2026-04-12 12:00 |
04:37:56.43 |
+18:49:08.2 |
HIP 21621 |
9.66 |
| 2026-04-13 00:00 |
04:38:09.35 |
+18:49:40.5 |
HIP 21621 |
7.64 |
| 2026-04-13 12:00 |
04:38:22.36 |
+18:50:12.9 |
HIP 21621 |
6.52 |
| 2026-04-14 00:00 |
04:38:35.45 |
+18:50:45.2 |
HIP 21621 |
6.81 |
| 2026-04-14 12:00 |
04:38:48.62 |
+18:51:17.6 |
HIP 21621 |
8.37 |
| 2026-04-15 00:00 |
04:39:01.87 |
+18:51:50.0 |
HIP 21621 |
10.68 |
| 2026-04-15 12:00 |
04:39:15.19 |
+18:52:22.5 |
HIP 21621 |
13.37 |
| 2026-04-16 00:00 |
04:39:28.59 |
+18:52:54.9 |
HIP 21687 |
14.27 |