C/2014 U3 (Kowalski)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 U3 (Kowalski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-09-02T20:08:26.016000Z |
| Orbit solution date (soln_date, UTC) |
2022-08-01T03:23:53Z |
| Obs used |
51 |
| NEO |
- |
| M1 |
5.200 |
| K1 |
29.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-10-13.0000000 |
| e |
0.99332244 |
| q (au) |
2.555822 |
| a (au) |
382.748050 |
| i (deg) |
152.993159 |
| Ω (om, deg) |
163.558521 |
| ω (w, deg) |
51.065952 |
| M (ma, deg) |
0.005286 |
等級
散乱 + 全体線形
$$
M_a = (10.351 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.351 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-02-03 00:00 |
22:16:04.62 |
-17:46:52.6 |
HIP 109918 |
22.31 |
| 2026-02-03 12:00 |
22:16:08.50 |
-17:46:31.7 |
HIP 109918 |
22.86 |
| 2026-02-04 00:00 |
22:16:12.40 |
-17:46:10.9 |
HIP 109918 |
23.44 |
| 2026-02-04 12:00 |
22:16:16.30 |
-17:45:50.0 |
HIP 109918 |
24.05 |
| 2026-02-05 00:00 |
22:16:20.22 |
-17:45:29.2 |
HIP 109918 |
24.69 |
| 2026-02-05 12:00 |
22:16:24.14 |
-17:45:08.3 |
HIP 109918 |
25.35 |
| 2026-02-06 00:00 |
22:16:28.08 |
-17:44:47.5 |
HIP 109918 |
26.03 |
| 2026-02-06 12:00 |
22:16:32.02 |
-17:44:26.7 |
HIP 109918 |
26.73 |
| 2026-02-07 00:00 |
22:16:35.97 |
-17:44:05.9 |
HIP 109918 |
27.45 |
| 2026-02-07 12:00 |
22:16:39.93 |
-17:43:45.1 |
HIP 109918 |
28.19 |
| 2026-02-08 00:00 |
22:16:43.89 |
-17:43:24.4 |
HIP 110063 |
28.75 |
| 2026-02-08 12:00 |
22:16:47.87 |
-17:43:03.6 |
HIP 110063 |
28.71 |
| 2026-02-09 00:00 |
22:16:51.85 |
-17:42:42.9 |
HIP 110063 |
28.69 |
| 2026-02-09 12:00 |
22:16:55.84 |
-17:42:22.2 |
HIP 110063 |
28.71 |
| 2026-02-10 00:00 |
22:16:59.83 |
-17:42:01.6 |
HIP 110063 |
28.77 |
| 2026-02-10 12:00 |
22:17:03.83 |
-17:41:40.9 |
HIP 110063 |
28.86 |
| 2026-02-11 00:00 |
22:17:07.84 |
-17:41:20.3 |
HIP 110063 |
28.98 |
| 2026-02-11 12:00 |
22:17:11.85 |
-17:40:59.8 |
HIP 110063 |
29.14 |
| 2026-02-12 00:00 |
22:17:15.87 |
-17:40:39.2 |
HIP 110063 |
29.33 |
| 2026-02-12 12:00 |
22:17:19.89 |
-17:40:18.7 |
HIP 110063 |
29.56 |
| 2026-02-13 00:00 |
22:17:23.92 |
-17:39:58.3 |
HIP 110063 |
29.82 |
| 2026-02-13 12:00 |
22:17:27.95 |
-17:39:37.8 |
HIP 110063 |
30.10 |
| 2026-02-14 00:00 |
22:17:31.99 |
-17:39:17.5 |
HIP 110063 |
30.42 |
| 2026-02-14 12:00 |
22:17:36.03 |
-17:38:57.1 |
HIP 110063 |
30.77 |
| 2026-02-15 00:00 |
22:17:40.07 |
-17:38:36.8 |
HIP 110063 |
31.15 |
| 2026-02-15 12:00 |
22:17:44.12 |
-17:38:16.6 |
HIP 110063 |
31.56 |
| 2026-02-16 00:00 |
22:17:48.17 |
-17:37:56.4 |
HIP 110063 |
31.99 |
| 2026-02-16 12:00 |
22:17:52.22 |
-17:37:36.2 |
HIP 110063 |
32.45 |
| 2026-02-17 00:00 |
22:17:56.28 |
-17:37:16.1 |
HIP 110063 |
32.93 |
| 2026-02-17 12:00 |
22:18:00.34 |
-17:36:56.0 |
HIP 110063 |
33.43 |
| 2026-02-18 00:00 |
22:18:04.40 |
-17:36:36.1 |
HIP 110063 |
33.96 |
| 2026-02-18 12:00 |
22:18:08.46 |
-17:36:16.1 |
HIP 110063 |
34.51 |
| 2026-02-19 00:00 |
22:18:12.52 |
-17:35:56.2 |
HIP 110063 |
35.08 |
| 2026-02-19 12:00 |
22:18:16.58 |
-17:35:36.4 |
HIP 110063 |
35.67 |
| 2026-02-20 00:00 |
22:18:20.64 |
-17:35:16.7 |
HIP 110063 |
36.28 |
| 2026-02-20 12:00 |
22:18:24.71 |
-17:34:57.0 |
HIP 110063 |
36.90 |
| 2026-02-21 00:00 |
22:18:28.77 |
-17:34:37.3 |
HIP 110063 |
37.54 |
| 2026-02-21 12:00 |
22:18:32.83 |
-17:34:17.8 |
HIP 110063 |
38.20 |
| 2026-02-22 00:00 |
22:18:36.89 |
-17:33:58.3 |
HIP 110063 |
38.87 |
| 2026-02-22 12:00 |
22:18:40.95 |
-17:33:38.9 |
HIP 110063 |
39.56 |
| 2026-02-23 00:00 |
22:18:45.01 |
-17:33:19.5 |
HIP 110063 |
40.25 |
| 2026-02-23 12:00 |
22:18:49.06 |
-17:33:00.2 |
HIP 110063 |
40.96 |
| 2026-02-24 00:00 |
22:18:53.12 |
-17:32:41.1 |
HIP 110063 |
41.68 |