メタデータ
| 項目 |
値 |
| Designation |
C/2012 T6 (Kowalski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-08-26T09:14:54.784320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:24Z |
| Obs used |
142 |
| NEO |
- |
| M1 |
15.700 |
| 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) |
2012-11-03.0000000 |
| e |
0.87633751 |
| q (au) |
1.775087 |
| a (au) |
14.354288 |
| i (deg) |
33.275501 |
| Ω (om, deg) |
186.220461 |
| ω (w, deg) |
198.098653 |
| M (ma, deg) |
1.243507 |
等級
散乱 + 全体線形
$$
M_a = (14.029 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.029 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.536 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
12:33:43.05 |
-00:49:53.5 |
HIP 61240 |
35.25 |
| 2026-05-12 12:00 |
12:33:39.74 |
-00:49:30.8 |
HIP 61240 |
34.63 |
| 2026-05-13 00:00 |
12:33:36.45 |
-00:49:08.4 |
HIP 61240 |
34.04 |
| 2026-05-13 12:00 |
12:33:33.20 |
-00:48:46.2 |
HIP 61240 |
33.47 |
| 2026-05-14 00:00 |
12:33:29.98 |
-00:48:24.2 |
HIP 61240 |
32.92 |
| 2026-05-14 12:00 |
12:33:26.79 |
-00:48:02.4 |
HIP 61240 |
32.38 |
| 2026-05-15 00:00 |
12:33:23.63 |
-00:47:40.9 |
HIP 61240 |
31.87 |
| 2026-05-15 12:00 |
12:33:20.50 |
-00:47:19.6 |
HIP 61240 |
31.38 |
| 2026-05-16 00:00 |
12:33:17.40 |
-00:46:58.5 |
HIP 61240 |
30.91 |
| 2026-05-16 12:00 |
12:33:14.34 |
-00:46:37.7 |
HIP 61240 |
30.46 |
| 2026-05-17 00:00 |
12:33:11.31 |
-00:46:17.1 |
HIP 61240 |
30.03 |
| 2026-05-17 12:00 |
12:33:08.32 |
-00:45:56.8 |
HIP 61240 |
29.62 |
| 2026-05-18 00:00 |
12:33:05.35 |
-00:45:36.6 |
HIP 61240 |
29.24 |
| 2026-05-18 12:00 |
12:33:02.42 |
-00:45:16.8 |
HIP 61240 |
28.88 |
| 2026-05-19 00:00 |
12:32:59.53 |
-00:44:57.1 |
HIP 61240 |
28.54 |
| 2026-05-19 12:00 |
12:32:56.67 |
-00:44:37.7 |
HIP 61240 |
28.22 |
| 2026-05-20 00:00 |
12:32:53.84 |
-00:44:18.6 |
HIP 61240 |
27.92 |
| 2026-05-20 12:00 |
12:32:51.05 |
-00:43:59.7 |
HIP 61240 |
27.65 |
| 2026-05-21 00:00 |
12:32:48.29 |
-00:43:41.0 |
HIP 61240 |
27.40 |
| 2026-05-21 12:00 |
12:32:45.57 |
-00:43:22.6 |
HIP 61240 |
27.17 |
| 2026-05-22 00:00 |
12:32:42.88 |
-00:43:04.4 |
HIP 61240 |
26.96 |
| 2026-05-22 12:00 |
12:32:40.23 |
-00:42:46.5 |
HIP 61240 |
26.77 |
| 2026-05-23 00:00 |
12:32:37.62 |
-00:42:28.8 |
HIP 61240 |
26.60 |
| 2026-05-23 12:00 |
12:32:35.04 |
-00:42:11.4 |
HIP 61240 |
26.46 |
| 2026-05-24 00:00 |
12:32:32.49 |
-00:41:54.2 |
HIP 61240 |
26.33 |
| 2026-05-24 12:00 |
12:32:29.98 |
-00:41:37.3 |
HIP 61240 |
26.22 |
| 2026-05-25 00:00 |
12:32:27.51 |
-00:41:20.6 |
HIP 61240 |
26.14 |
| 2026-05-25 12:00 |
12:32:25.07 |
-00:41:04.2 |
HIP 61240 |
26.07 |
| 2026-05-26 00:00 |
12:32:22.67 |
-00:40:48.1 |
HIP 61240 |
26.02 |
| 2026-05-26 12:00 |
12:32:20.31 |
-00:40:32.2 |
HIP 61240 |
25.98 |
| 2026-05-27 00:00 |
12:32:17.98 |
-00:40:16.5 |
HIP 61240 |
25.96 |
| 2026-05-27 12:00 |
12:32:15.69 |
-00:40:01.1 |
HIP 61240 |
25.96 |
| 2026-05-28 00:00 |
12:32:13.44 |
-00:39:46.0 |
HIP 61240 |
25.97 |
| 2026-05-28 12:00 |
12:32:11.22 |
-00:39:31.1 |
HIP 61240 |
26.00 |
| 2026-05-29 00:00 |
12:32:09.04 |
-00:39:16.4 |
HIP 61240 |
26.04 |
| 2026-05-29 12:00 |
12:32:06.90 |
-00:39:02.1 |
HIP 61240 |
26.09 |
| 2026-05-30 00:00 |
12:32:04.80 |
-00:38:47.9 |
HIP 61240 |
26.16 |
| 2026-05-30 12:00 |
12:32:02.73 |
-00:38:34.1 |
HIP 61240 |
26.23 |
| 2026-05-31 00:00 |
12:32:00.71 |
-00:38:20.5 |
HIP 61240 |
26.32 |
| 2026-05-31 12:00 |
12:31:58.71 |
-00:38:07.1 |
HIP 61240 |
26.41 |
| 2026-06-01 00:00 |
12:31:56.76 |
-00:37:54.1 |
HIP 61240 |
26.52 |
| 2026-06-01 12:00 |
12:31:54.85 |
-00:37:41.2 |
HIP 61240 |
26.63 |
| 2026-06-02 00:00 |
12:31:52.97 |
-00:37:28.7 |
HIP 61240 |
26.75 |