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 |
1.000 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
12:31:51.13 |
-00:37:16.4 |
HIP 61240 |
26.88 |
| 2026-06-03 00:00 |
12:31:49.33 |
-00:37:04.4 |
HIP 61240 |
27.01 |
| 2026-06-03 12:00 |
12:31:47.57 |
-00:36:52.6 |
HIP 61240 |
27.15 |
| 2026-06-04 00:00 |
12:31:45.85 |
-00:36:41.1 |
HIP 61240 |
27.29 |
| 2026-06-04 12:00 |
12:31:44.17 |
-00:36:29.8 |
HIP 61240 |
27.43 |
| 2026-06-05 00:00 |
12:31:42.52 |
-00:36:18.8 |
HIP 61240 |
27.58 |
| 2026-06-05 12:00 |
12:31:40.92 |
-00:36:08.1 |
HIP 61240 |
27.74 |
| 2026-06-06 00:00 |
12:31:39.35 |
-00:35:57.7 |
HIP 61240 |
27.89 |
| 2026-06-06 12:00 |
12:31:37.82 |
-00:35:47.5 |
HIP 61240 |
28.05 |
| 2026-06-07 00:00 |
12:31:36.33 |
-00:35:37.6 |
HIP 61240 |
28.20 |
| 2026-06-07 12:00 |
12:31:34.88 |
-00:35:27.9 |
HIP 61240 |
28.36 |
| 2026-06-08 00:00 |
12:31:33.48 |
-00:35:18.5 |
HIP 61240 |
28.52 |
| 2026-06-08 12:00 |
12:31:32.11 |
-00:35:09.4 |
HIP 61240 |
28.68 |
| 2026-06-09 00:00 |
12:31:30.78 |
-00:35:00.6 |
HIP 61240 |
28.83 |
| 2026-06-09 12:00 |
12:31:29.49 |
-00:34:52.0 |
HIP 61240 |
28.99 |
| 2026-06-10 00:00 |
12:31:28.24 |
-00:34:43.7 |
HIP 61240 |
29.14 |
| 2026-06-10 12:00 |
12:31:27.03 |
-00:34:35.6 |
HIP 61240 |
29.30 |
| 2026-06-11 00:00 |
12:31:25.86 |
-00:34:27.8 |
HIP 61240 |
29.45 |
| 2026-06-11 12:00 |
12:31:24.73 |
-00:34:20.3 |
HIP 61240 |
29.59 |
| 2026-06-12 00:00 |
12:31:23.64 |
-00:34:13.1 |
HIP 61240 |
29.74 |
| 2026-06-12 12:00 |
12:31:22.59 |
-00:34:06.1 |
HIP 61240 |
29.88 |
| 2026-06-13 00:00 |
12:31:21.58 |
-00:33:59.4 |
HIP 61240 |
30.02 |
| 2026-06-13 12:00 |
12:31:20.61 |
-00:33:53.0 |
HIP 61240 |
30.15 |
| 2026-06-14 00:00 |
12:31:19.68 |
-00:33:46.8 |
HIP 61240 |
30.28 |
| 2026-06-14 12:00 |
12:31:18.80 |
-00:33:40.9 |
HIP 61240 |
30.41 |
| 2026-06-15 00:00 |
12:31:17.95 |
-00:33:35.3 |
HIP 61240 |
30.53 |
| 2026-06-15 12:00 |
12:31:17.14 |
-00:33:30.0 |
HIP 61240 |
30.65 |
| 2026-06-16 00:00 |
12:31:16.38 |
-00:33:24.9 |
HIP 61240 |
30.76 |
| 2026-06-16 12:00 |
12:31:15.66 |
-00:33:20.1 |
HIP 61240 |
30.87 |
| 2026-06-17 00:00 |
12:31:14.97 |
-00:33:15.6 |
HIP 61240 |
30.97 |
| 2026-06-17 12:00 |
12:31:14.33 |
-00:33:11.3 |
HIP 61240 |
31.07 |
| 2026-06-18 00:00 |
12:31:13.73 |
-00:33:07.3 |
HIP 61240 |
31.16 |
| 2026-06-18 12:00 |
12:31:13.17 |
-00:33:03.6 |
HIP 61240 |
31.24 |
| 2026-06-19 00:00 |
12:31:12.65 |
-00:33:00.1 |
HIP 61240 |
31.32 |
| 2026-06-19 12:00 |
12:31:12.17 |
-00:32:57.0 |
HIP 61240 |
31.39 |
| 2026-06-20 00:00 |
12:31:11.74 |
-00:32:54.1 |
HIP 61240 |
31.46 |
| 2026-06-20 12:00 |
12:31:11.34 |
-00:32:51.4 |
HIP 61240 |
31.52 |
| 2026-06-21 00:00 |
12:31:10.98 |
-00:32:49.0 |
HIP 61240 |
31.58 |
| 2026-06-21 12:00 |
12:31:10.67 |
-00:32:46.9 |
HIP 61240 |
31.63 |
| 2026-06-22 00:00 |
12:31:10.40 |
-00:32:45.1 |
HIP 61240 |
31.67 |