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
$$
M_a = (8.230 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.230 |
| n |
6.000 |
| gf |
0.888 |
| gb |
-0.500 |
| k |
0.907 |
| δ90 |
1.584 |
| 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 |
+16.7648 |
-10.378 |
| 2013-08-04 |
2014-05-21 |
-10.4857 |
+4.216 |
| 2014-05-21 |
2015-09-08 |
+8.7931 |
-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) |
| 2026-07-29 00:00 |
05:37:35.96 |
+20:00:03.7 |
HIP 26438 |
13.29 |
| 2026-07-29 12:00 |
05:37:51.49 |
+20:00:02.3 |
HIP 26539 |
11.31 |
| 2026-07-30 00:00 |
05:38:06.97 |
+20:00:00.6 |
HIP 26539 |
7.77 |
| 2026-07-30 12:00 |
05:38:22.39 |
+19:59:58.8 |
HIP 26539 |
4.41 |
| 2026-07-31 00:00 |
05:38:37.75 |
+19:59:56.7 |
HIP 26539 |
2.18 |
| 2026-07-31 12:00 |
05:38:53.06 |
+19:59:54.4 |
HIP 26568 |
2.03 |
| 2026-08-01 00:00 |
05:39:08.30 |
+19:59:52.0 |
HIP 26568 |
3.55 |
| 2026-08-01 12:00 |
05:39:23.49 |
+19:59:49.3 |
HIP 26568 |
6.82 |
| 2026-08-02 00:00 |
05:39:38.61 |
+19:59:46.4 |
HIP 26568 |
10.28 |
| 2026-08-02 12:00 |
05:39:53.68 |
+19:59:43.3 |
HIP 26568 |
13.77 |
| 2026-08-03 00:00 |
05:40:08.68 |
+19:59:40.1 |
HIP 26770 |
15.35 |
| 2026-08-03 12:00 |
05:40:23.62 |
+19:59:36.6 |
HIP 26770 |
12.03 |
| 2026-08-04 00:00 |
05:40:38.50 |
+19:59:32.9 |
HIP 26770 |
8.86 |
| 2026-08-04 12:00 |
05:40:53.31 |
+19:59:29.0 |
HIP 26770 |
6.07 |
| 2026-08-05 00:00 |
05:41:08.06 |
+19:59:24.9 |
HIP 26770 |
4.42 |
| 2026-08-05 12:00 |
05:41:22.74 |
+19:59:20.6 |
HIP 26770 |
5.12 |
| 2026-08-06 00:00 |
05:41:37.35 |
+19:59:16.1 |
HIP 26770 |
7.51 |
| 2026-08-06 12:00 |
05:41:51.90 |
+19:59:11.4 |
HIP 26770 |
10.49 |
| 2026-08-07 00:00 |
05:42:06.38 |
+19:59:06.5 |
HIP 26916 |
13.10 |
| 2026-08-07 12:00 |
05:42:20.80 |
+19:59:01.4 |
HIP 26916 |
10.62 |
| 2026-08-08 00:00 |
05:42:35.14 |
+19:58:56.1 |
HIP 26916 |
8.77 |
| 2026-08-08 12:00 |
05:42:49.41 |
+19:58:50.6 |
HIP 26951 |
7.02 |
| 2026-08-09 00:00 |
05:43:03.62 |
+19:58:44.9 |
HIP 26951 |
5.72 |
| 2026-08-09 12:00 |
05:43:17.75 |
+19:58:39.1 |
HIP 26951 |
6.18 |
| 2026-08-10 00:00 |
05:43:31.80 |
+19:58:33.0 |
HIP 26951 |
8.11 |
| 2026-08-10 12:00 |
05:43:45.79 |
+19:58:26.8 |
HIP 26951 |
10.71 |
| 2026-08-11 00:00 |
05:43:59.70 |
+19:58:20.3 |
HIP 26951 |
13.60 |
| 2026-08-11 12:00 |
05:44:13.53 |
+19:58:13.7 |
HIP 26951 |
16.62 |
| 2026-08-12 00:00 |
05:44:27.29 |
+19:58:06.8 |
HIP 26951 |
19.69 |
| 2026-08-12 12:00 |
05:44:40.98 |
+19:57:59.8 |
HIP 26951 |
22.79 |
| 2026-08-13 00:00 |
05:44:54.58 |
+19:57:52.6 |
HIP 26951 |
25.91 |
| 2026-08-13 12:00 |
05:45:08.11 |
+19:57:45.3 |
HIP 27266 |
26.20 |
| 2026-08-14 00:00 |
05:45:21.56 |
+19:57:37.7 |
HIP 27266 |
23.55 |
| 2026-08-14 12:00 |
05:45:34.93 |
+19:57:30.0 |
HIP 27266 |
21.06 |
| 2026-08-15 00:00 |
05:45:48.22 |
+19:57:22.0 |
HIP 27266 |
18.79 |
| 2026-08-15 12:00 |
05:46:01.43 |
+19:57:13.9 |
HIP 27266 |
16.80 |
| 2026-08-16 00:00 |
05:46:14.55 |
+19:57:05.7 |
HIP 27266 |
15.21 |
| 2026-08-16 12:00 |
05:46:27.60 |
+19:56:57.2 |
HIP 27266 |
14.12 |
| 2026-08-17 00:00 |
05:46:40.56 |
+19:56:48.6 |
HIP 27266 |
13.66 |
| 2026-08-17 12:00 |
05:46:53.43 |
+19:56:39.8 |
HIP 27266 |
13.87 |
| 2026-08-18 00:00 |
05:47:06.23 |
+19:56:30.8 |
HIP 27266 |
14.71 |
| 2026-08-18 12:00 |
05:47:18.93 |
+19:56:21.7 |
HIP 27266 |
16.07 |
| 2026-08-19 00:00 |
05:47:31.55 |
+19:56:12.3 |
HIP 27266 |
17.82 |