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
$$
M_a = (-1.359 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-1.359 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.801 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
05:07:19.06 |
-18:43:35.5 |
HIP 23848 |
18.98 |
| 2026-06-03 00:00 |
05:07:25.58 |
-18:43:26.6 |
HIP 23848 |
18.84 |
| 2026-06-03 12:00 |
05:07:32.10 |
-18:43:18.1 |
HIP 23848 |
18.83 |
| 2026-06-04 00:00 |
05:07:38.63 |
-18:43:10.0 |
HIP 23848 |
18.94 |
| 2026-06-04 12:00 |
05:07:45.16 |
-18:43:02.4 |
HIP 23848 |
19.16 |
| 2026-06-05 00:00 |
05:07:51.70 |
-18:42:55.2 |
HIP 23848 |
19.50 |
| 2026-06-05 12:00 |
05:07:58.23 |
-18:42:48.4 |
HIP 23848 |
19.95 |
| 2026-06-06 00:00 |
05:08:04.77 |
-18:42:42.1 |
HIP 23848 |
20.50 |
| 2026-06-06 12:00 |
05:08:11.32 |
-18:42:36.1 |
HIP 23848 |
21.14 |
| 2026-06-07 00:00 |
05:08:17.86 |
-18:42:30.6 |
HIP 23848 |
21.87 |
| 2026-06-07 12:00 |
05:08:24.40 |
-18:42:25.6 |
HIP 23848 |
22.67 |
| 2026-06-08 00:00 |
05:08:30.95 |
-18:42:20.9 |
HIP 23848 |
23.54 |
| 2026-06-08 12:00 |
05:08:37.49 |
-18:42:16.7 |
HIP 23848 |
24.48 |
| 2026-06-09 00:00 |
05:08:44.04 |
-18:42:12.9 |
HIP 23848 |
25.46 |
| 2026-06-09 12:00 |
05:08:50.59 |
-18:42:09.5 |
HIP 24092 |
24.36 |
| 2026-06-10 00:00 |
05:08:57.13 |
-18:42:06.6 |
HIP 24092 |
22.82 |
| 2026-06-10 12:00 |
05:09:03.68 |
-18:42:04.1 |
HIP 24092 |
21.27 |
| 2026-06-11 00:00 |
05:09:10.22 |
-18:42:02.0 |
HIP 24092 |
19.73 |
| 2026-06-11 12:00 |
05:09:16.77 |
-18:42:00.3 |
HIP 24092 |
18.19 |
| 2026-06-12 00:00 |
05:09:23.31 |
-18:41:59.1 |
HIP 24092 |
16.65 |
| 2026-06-12 12:00 |
05:09:29.85 |
-18:41:58.4 |
HIP 24092 |
15.11 |
| 2026-06-13 00:00 |
05:09:36.38 |
-18:41:58.0 |
HIP 24092 |
13.58 |
| 2026-06-13 12:00 |
05:09:42.92 |
-18:41:58.1 |
HIP 24092 |
12.06 |
| 2026-06-14 00:00 |
05:09:49.45 |
-18:41:58.6 |
HIP 24092 |
10.54 |
| 2026-06-14 12:00 |
05:09:55.98 |
-18:41:59.6 |
HIP 24092 |
9.04 |
| 2026-06-15 00:00 |
05:10:02.50 |
-18:42:00.9 |
HIP 24092 |
7.56 |
| 2026-06-15 12:00 |
05:10:09.02 |
-18:42:02.8 |
HIP 24092 |
6.12 |
| 2026-06-16 00:00 |
05:10:15.53 |
-18:42:05.0 |
HIP 24092 |
4.74 |
| 2026-06-16 12:00 |
05:10:22.04 |
-18:42:07.7 |
HIP 24092 |
3.51 |
| 2026-06-17 00:00 |
05:10:28.55 |
-18:42:10.8 |
HIP 24092 |
2.65 |
| 2026-06-17 12:00 |
05:10:35.05 |
-18:42:14.4 |
HIP 24092 |
2.54 |
| 2026-06-18 00:00 |
05:10:41.54 |
-18:42:18.4 |
HIP 24092 |
3.27 |
| 2026-06-18 12:00 |
05:10:48.02 |
-18:42:22.8 |
HIP 24092 |
4.43 |
| 2026-06-19 00:00 |
05:10:54.50 |
-18:42:27.6 |
HIP 24092 |
5.78 |
| 2026-06-19 12:00 |
05:11:00.98 |
-18:42:32.9 |
HIP 24092 |
7.20 |
| 2026-06-20 00:00 |
05:11:07.44 |
-18:42:38.6 |
HIP 24092 |
8.66 |
| 2026-06-20 12:00 |
05:11:13.90 |
-18:42:44.8 |
HIP 24092 |
10.15 |
| 2026-06-21 00:00 |
05:11:20.35 |
-18:42:51.3 |
HIP 24092 |
11.64 |
| 2026-06-21 12:00 |
05:11:26.79 |
-18:42:58.3 |
HIP 24092 |
13.15 |
| 2026-06-22 00:00 |
05:11:33.22 |
-18:43:05.8 |
HIP 24092 |
14.66 |