メタデータ
| 項目 |
値 |
| Designation |
C/2012 Q1 (Kowalski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-02-09T09:27:09.711360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:20Z |
| Obs used |
196 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
8.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-01-30.0000000 |
| e |
0.63712480 |
| q (au) |
9.482233 |
| a (au) |
26.130838 |
| i (deg) |
45.182651 |
| Ω (om, deg) |
184.437292 |
| ω (w, deg) |
139.242426 |
| M (ma, deg) |
2.623876 |
等級
散乱 + 全体線形
$$
M_a = (-1.358 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-1.358 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.573 |
| k |
1.000 |
| 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 |
05:02:46.78 |
-18:56:28.0 |
HIP 23456 |
28.29 |
| 2026-05-12 12:00 |
05:02:52.83 |
-18:56:01.7 |
HIP 23456 |
28.09 |
| 2026-05-13 00:00 |
05:02:58.90 |
-18:55:35.7 |
HIP 23456 |
27.98 |
| 2026-05-13 12:00 |
05:03:04.98 |
-18:55:10.1 |
HIP 23456 |
27.95 |
| 2026-05-14 00:00 |
05:03:11.09 |
-18:54:44.9 |
HIP 23456 |
28.01 |
| 2026-05-14 12:00 |
05:03:17.21 |
-18:54:20.0 |
HIP 23456 |
28.15 |
| 2026-05-15 00:00 |
05:03:23.34 |
-18:53:55.6 |
HIP 23456 |
28.39 |
| 2026-05-15 12:00 |
05:03:29.50 |
-18:53:31.6 |
HIP 23456 |
28.71 |
| 2026-05-16 00:00 |
05:03:35.67 |
-18:53:07.9 |
HIP 23456 |
29.11 |
| 2026-05-16 12:00 |
05:03:41.85 |
-18:52:44.6 |
HIP 23456 |
29.59 |
| 2026-05-17 00:00 |
05:03:48.05 |
-18:52:21.8 |
HIP 23456 |
30.15 |
| 2026-05-17 12:00 |
05:03:54.27 |
-18:51:59.3 |
HIP 23456 |
30.78 |
| 2026-05-18 00:00 |
05:04:00.50 |
-18:51:37.2 |
HIP 23456 |
31.48 |
| 2026-05-18 12:00 |
05:04:06.75 |
-18:51:15.6 |
HIP 23456 |
32.24 |
| 2026-05-19 00:00 |
05:04:13.01 |
-18:50:54.3 |
HIP 23456 |
33.07 |
| 2026-05-19 12:00 |
05:04:19.28 |
-18:50:33.4 |
HIP 23456 |
33.94 |
| 2026-05-20 00:00 |
05:04:25.57 |
-18:50:13.0 |
HIP 23456 |
34.87 |
| 2026-05-20 12:00 |
05:04:31.87 |
-18:49:52.9 |
HIP 23456 |
35.85 |
| 2026-05-21 00:00 |
05:04:38.18 |
-18:49:33.3 |
HIP 23456 |
36.87 |
| 2026-05-21 12:00 |
05:04:44.50 |
-18:49:14.0 |
HIP 23456 |
37.93 |
| 2026-05-22 00:00 |
05:04:50.84 |
-18:48:55.2 |
HIP 23456 |
39.03 |
| 2026-05-22 12:00 |
05:04:57.18 |
-18:48:36.7 |
HIP 23848 |
40.08 |
| 2026-05-23 00:00 |
05:05:03.54 |
-18:48:18.7 |
HIP 23848 |
38.78 |
| 2026-05-23 12:00 |
05:05:09.91 |
-18:48:01.1 |
HIP 23848 |
37.48 |
| 2026-05-24 00:00 |
05:05:16.29 |
-18:47:43.9 |
HIP 23848 |
36.20 |
| 2026-05-24 12:00 |
05:05:22.68 |
-18:47:27.1 |
HIP 23848 |
34.94 |
| 2026-05-25 00:00 |
05:05:29.08 |
-18:47:10.7 |
HIP 23848 |
33.69 |
| 2026-05-25 12:00 |
05:05:35.49 |
-18:46:54.7 |
HIP 23848 |
32.46 |
| 2026-05-26 00:00 |
05:05:41.91 |
-18:46:39.1 |
HIP 23848 |
31.26 |
| 2026-05-26 12:00 |
05:05:48.33 |
-18:46:24.0 |
HIP 23848 |
30.08 |
| 2026-05-27 00:00 |
05:05:54.77 |
-18:46:09.2 |
HIP 23848 |
28.92 |
| 2026-05-27 12:00 |
05:06:01.21 |
-18:45:54.9 |
HIP 23848 |
27.80 |
| 2026-05-28 00:00 |
05:06:07.66 |
-18:45:41.0 |
HIP 23848 |
26.72 |
| 2026-05-28 12:00 |
05:06:14.12 |
-18:45:27.5 |
HIP 23848 |
25.68 |
| 2026-05-29 00:00 |
05:06:20.59 |
-18:45:14.4 |
HIP 23848 |
24.68 |
| 2026-05-29 12:00 |
05:06:27.06 |
-18:45:01.8 |
HIP 23848 |
23.74 |
| 2026-05-30 00:00 |
05:06:33.54 |
-18:44:49.5 |
HIP 23848 |
22.85 |
| 2026-05-30 12:00 |
05:06:40.03 |
-18:44:37.7 |
HIP 23848 |
22.04 |
| 2026-05-31 00:00 |
05:06:46.52 |
-18:44:26.3 |
HIP 23848 |
21.29 |
| 2026-05-31 12:00 |
05:06:53.02 |
-18:44:15.3 |
HIP 23848 |
20.63 |
| 2026-06-01 00:00 |
05:06:59.52 |
-18:44:04.7 |
HIP 23848 |
20.06 |
| 2026-06-01 12:00 |
05:07:06.03 |
-18:43:54.5 |
HIP 23848 |
19.59 |
| 2026-06-02 00:00 |
05:07:12.54 |
-18:43:44.8 |
HIP 23848 |
19.23 |