C/2014 W6 (Catalina)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 W6 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-03-19T00:07:11.818560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:03Z |
| Obs used |
139 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-01-30.0000000 |
| e |
1.00174154 |
| q (au) |
3.087625 |
| a (au) |
-1772.929151 |
| i (deg) |
53.564298 |
| Ω (om, deg) |
338.129791 |
| ω (w, deg) |
209.854804 |
| M (ma, deg) |
-0.000634 |
等級
散乱 + 全体線形
$$
M_a = (12.657 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.657 |
| n |
2.000 |
| 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 |
22:24:05.81 |
-19:29:19.9 |
HIP 110475 |
22.09 |
| 2026-02-03 12:00 |
22:24:10.25 |
-19:28:45.9 |
HIP 110475 |
22.86 |
| 2026-02-04 00:00 |
22:24:14.70 |
-19:28:11.9 |
HIP 110475 |
23.67 |
| 2026-02-04 12:00 |
22:24:19.17 |
-19:27:38.0 |
HIP 110475 |
24.52 |
| 2026-02-05 00:00 |
22:24:23.64 |
-19:27:04.1 |
HIP 110475 |
25.39 |
| 2026-02-05 12:00 |
22:24:28.13 |
-19:26:30.2 |
HIP 110475 |
26.30 |
| 2026-02-06 00:00 |
22:24:32.62 |
-19:25:56.3 |
HIP 110475 |
27.23 |
| 2026-02-06 12:00 |
22:24:37.13 |
-19:25:22.5 |
HIP 110750 |
26.72 |
| 2026-02-07 00:00 |
22:24:41.64 |
-19:24:48.7 |
HIP 110750 |
25.52 |
| 2026-02-07 12:00 |
22:24:46.17 |
-19:24:15.0 |
HIP 110750 |
24.31 |
| 2026-02-08 00:00 |
22:24:50.70 |
-19:23:41.3 |
HIP 110750 |
23.11 |
| 2026-02-08 12:00 |
22:24:55.25 |
-19:23:07.6 |
HIP 110750 |
21.90 |
| 2026-02-09 00:00 |
22:24:59.80 |
-19:22:34.0 |
HIP 110750 |
20.70 |
| 2026-02-09 12:00 |
22:25:04.36 |
-19:22:00.4 |
HIP 110750 |
19.49 |
| 2026-02-10 00:00 |
22:25:08.92 |
-19:21:26.9 |
HIP 110750 |
18.28 |
| 2026-02-10 12:00 |
22:25:13.50 |
-19:20:53.4 |
HIP 110750 |
17.08 |
| 2026-02-11 00:00 |
22:25:18.08 |
-19:20:19.9 |
HIP 110750 |
15.87 |
| 2026-02-11 12:00 |
22:25:22.67 |
-19:19:46.6 |
HIP 110750 |
14.66 |
| 2026-02-12 00:00 |
22:25:27.27 |
-19:19:13.2 |
HIP 110750 |
13.46 |
| 2026-02-12 12:00 |
22:25:31.87 |
-19:18:39.9 |
HIP 110750 |
12.26 |
| 2026-02-13 00:00 |
22:25:36.48 |
-19:18:06.7 |
HIP 110750 |
11.06 |
| 2026-02-13 12:00 |
22:25:41.09 |
-19:17:33.5 |
HIP 110750 |
9.86 |
| 2026-02-14 00:00 |
22:25:45.71 |
-19:17:00.4 |
HIP 110750 |
8.67 |
| 2026-02-14 12:00 |
22:25:50.34 |
-19:16:27.4 |
HIP 110750 |
7.49 |
| 2026-02-15 00:00 |
22:25:54.97 |
-19:15:54.4 |
HIP 110750 |
6.33 |
| 2026-02-15 12:00 |
22:25:59.60 |
-19:15:21.5 |
HIP 110750 |
5.20 |
| 2026-02-16 00:00 |
22:26:04.24 |
-19:14:48.7 |
HIP 110750 |
4.12 |
| 2026-02-16 12:00 |
22:26:08.88 |
-19:14:15.9 |
HIP 110750 |
3.15 |
| 2026-02-17 00:00 |
22:26:13.53 |
-19:13:43.2 |
HIP 110750 |
2.42 |
| 2026-02-17 12:00 |
22:26:18.18 |
-19:13:10.5 |
HIP 110750 |
2.19 |
| 2026-02-18 00:00 |
22:26:22.83 |
-19:12:38.0 |
HIP 110750 |
2.60 |
| 2026-02-18 12:00 |
22:26:27.48 |
-19:12:05.5 |
HIP 110750 |
3.42 |
| 2026-02-19 00:00 |
22:26:32.14 |
-19:11:33.1 |
HIP 110750 |
4.44 |
| 2026-02-19 12:00 |
22:26:36.80 |
-19:11:00.8 |
HIP 110750 |
5.54 |
| 2026-02-20 00:00 |
22:26:41.46 |
-19:10:28.5 |
HIP 110750 |
6.68 |
| 2026-02-20 12:00 |
22:26:46.12 |
-19:09:56.4 |
HIP 110750 |
7.85 |
| 2026-02-21 00:00 |
22:26:50.78 |
-19:09:24.3 |
HIP 110750 |
9.03 |
| 2026-02-21 12:00 |
22:26:55.44 |
-19:08:52.3 |
HIP 110750 |
10.22 |
| 2026-02-22 00:00 |
22:27:00.10 |
-19:08:20.4 |
HIP 110750 |
11.42 |
| 2026-02-22 12:00 |
22:27:04.76 |
-19:07:48.6 |
HIP 110750 |
12.63 |
| 2026-02-23 00:00 |
22:27:09.43 |
-19:07:16.9 |
HIP 110750 |
13.83 |
| 2026-02-23 12:00 |
22:27:14.09 |
-19:06:45.3 |
HIP 110750 |
15.04 |
| 2026-02-24 00:00 |
22:27:18.75 |
-19:06:13.7 |
HIP 110750 |
16.25 |