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) |
| 2026-09-20 00:00 |
05:57:29.25 |
+19:41:27.1 |
HIP 28170 |
28.87 |
| 2026-09-20 12:00 |
05:57:34.80 |
+19:41:09.9 |
HIP 28170 |
28.85 |
| 2026-09-21 00:00 |
05:57:40.22 |
+19:40:52.6 |
HIP 28170 |
28.87 |
| 2026-09-21 12:00 |
05:57:45.51 |
+19:40:35.2 |
HIP 28170 |
28.94 |
| 2026-09-22 00:00 |
05:57:50.66 |
+19:40:17.7 |
HIP 28170 |
29.06 |
| 2026-09-22 12:00 |
05:57:55.69 |
+19:40:00.2 |
HIP 28373 |
28.47 |
| 2026-09-23 00:00 |
05:58:00.58 |
+19:39:42.6 |
HIP 28373 |
27.65 |
| 2026-09-23 12:00 |
05:58:05.34 |
+19:39:24.9 |
HIP 28373 |
26.89 |
| 2026-09-24 00:00 |
05:58:09.97 |
+19:39:07.2 |
HIP 28373 |
26.18 |
| 2026-09-24 12:00 |
05:58:14.46 |
+19:38:49.4 |
HIP 28373 |
25.53 |
| 2026-09-25 00:00 |
05:58:18.82 |
+19:38:31.6 |
HIP 28373 |
24.93 |
| 2026-09-25 12:00 |
05:58:23.04 |
+19:38:13.7 |
HIP 28373 |
24.39 |
| 2026-09-26 00:00 |
05:58:27.12 |
+19:37:55.8 |
HIP 28373 |
23.90 |
| 2026-09-26 12:00 |
05:58:31.07 |
+19:37:37.8 |
HIP 28373 |
23.47 |
| 2026-09-27 00:00 |
05:58:34.89 |
+19:37:19.7 |
HIP 28373 |
23.10 |
| 2026-09-27 12:00 |
05:58:38.56 |
+19:37:01.6 |
HIP 28373 |
22.78 |
| 2026-09-28 00:00 |
05:58:42.10 |
+19:36:43.5 |
HIP 28373 |
22.51 |
| 2026-09-28 12:00 |
05:58:45.50 |
+19:36:25.3 |
HIP 28373 |
22.29 |
| 2026-09-29 00:00 |
05:58:48.76 |
+19:36:07.1 |
HIP 28373 |
22.13 |
| 2026-09-29 12:00 |
05:58:51.88 |
+19:35:48.8 |
HIP 28373 |
22.01 |
| 2026-09-30 00:00 |
05:58:54.87 |
+19:35:30.5 |
HIP 28373 |
21.93 |
| 2026-09-30 12:00 |
05:58:57.71 |
+19:35:12.1 |
HIP 28373 |
21.89 |
| 2026-10-01 00:00 |
05:59:00.41 |
+19:34:53.7 |
HIP 28373 |
21.90 |
| 2026-10-01 12:00 |
05:59:02.97 |
+19:34:35.2 |
HIP 28373 |
21.94 |
| 2026-10-02 00:00 |
05:59:05.38 |
+19:34:16.7 |
HIP 28373 |
22.01 |
| 2026-10-02 12:00 |
05:59:07.66 |
+19:33:58.2 |
HIP 28373 |
22.12 |
| 2026-10-03 00:00 |
05:59:09.79 |
+19:33:39.6 |
HIP 28373 |
22.25 |
| 2026-10-03 12:00 |
05:59:11.78 |
+19:33:21.1 |
HIP 28373 |
22.41 |
| 2026-10-04 00:00 |
05:59:13.62 |
+19:33:02.4 |
HIP 28373 |
22.58 |
| 2026-10-04 12:00 |
05:59:15.32 |
+19:32:43.8 |
HIP 28373 |
22.78 |
| 2026-10-05 00:00 |
05:59:16.87 |
+19:32:25.1 |
HIP 28373 |
23.00 |
| 2026-10-05 12:00 |
05:59:18.28 |
+19:32:06.4 |
HIP 28373 |
23.23 |
| 2026-10-06 00:00 |
05:59:19.55 |
+19:31:47.7 |
HIP 28373 |
23.48 |
| 2026-10-06 12:00 |
05:59:20.66 |
+19:31:28.9 |
HIP 28373 |
23.74 |
| 2026-10-07 00:00 |
05:59:21.63 |
+19:31:10.1 |
HIP 28373 |
24.00 |
| 2026-10-07 12:00 |
05:59:22.45 |
+19:30:51.3 |
HIP 28373 |
24.28 |
| 2026-10-08 00:00 |
05:59:23.12 |
+19:30:32.5 |
HIP 28373 |
24.57 |
| 2026-10-08 12:00 |
05:59:23.65 |
+19:30:13.7 |
HIP 28373 |
24.86 |
| 2026-10-09 00:00 |
05:59:24.03 |
+19:29:54.8 |
HIP 28373 |
25.16 |
| 2026-10-09 12:00 |
05:59:24.26 |
+19:29:36.0 |
HIP 28519 |
25.43 |
| 2026-10-10 00:00 |
05:59:24.33 |
+19:29:17.1 |
HIP 28519 |
25.36 |
| 2026-10-10 12:00 |
05:59:24.27 |
+19:28:58.2 |
HIP 28519 |
25.33 |
| 2026-10-11 00:00 |
05:59:24.05 |
+19:28:39.3 |
HIP 28519 |
25.34 |