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 |
0.999 |
| gb |
-0.501 |
| 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 |
22:36:41.45 |
-18:18:34.6 |
HIP 111603 |
2.55 |
| 2026-06-01 12:00 |
22:36:41.33 |
-18:18:40.8 |
HIP 111603 |
2.63 |
| 2026-06-02 00:00 |
22:36:41.18 |
-18:18:47.2 |
HIP 111603 |
2.71 |
| 2026-06-02 12:00 |
22:36:40.98 |
-18:18:53.8 |
HIP 111603 |
2.79 |
| 2026-06-03 00:00 |
22:36:40.75 |
-18:19:00.6 |
HIP 111603 |
2.88 |
| 2026-06-03 12:00 |
22:36:40.48 |
-18:19:07.6 |
HIP 111603 |
2.97 |
| 2026-06-04 00:00 |
22:36:40.17 |
-18:19:14.8 |
HIP 111603 |
3.07 |
| 2026-06-04 12:00 |
22:36:39.82 |
-18:19:22.2 |
HIP 111603 |
3.17 |
| 2026-06-05 00:00 |
22:36:39.43 |
-18:19:29.8 |
HIP 111603 |
3.27 |
| 2026-06-05 12:00 |
22:36:39.01 |
-18:19:37.6 |
HIP 111603 |
3.39 |
| 2026-06-06 00:00 |
22:36:38.55 |
-18:19:45.7 |
HIP 111603 |
3.50 |
| 2026-06-06 12:00 |
22:36:38.05 |
-18:19:53.9 |
HIP 111603 |
3.63 |
| 2026-06-07 00:00 |
22:36:37.51 |
-18:20:02.4 |
HIP 111603 |
3.76 |
| 2026-06-07 12:00 |
22:36:36.93 |
-18:20:11.0 |
HIP 111603 |
3.90 |
| 2026-06-08 00:00 |
22:36:36.32 |
-18:20:19.9 |
HIP 111603 |
4.05 |
| 2026-06-08 12:00 |
22:36:35.67 |
-18:20:28.9 |
HIP 111603 |
4.21 |
| 2026-06-09 00:00 |
22:36:34.98 |
-18:20:38.2 |
HIP 111603 |
4.38 |
| 2026-06-09 12:00 |
22:36:34.25 |
-18:20:47.6 |
HIP 111603 |
4.55 |
| 2026-06-10 00:00 |
22:36:33.48 |
-18:20:57.3 |
HIP 111603 |
4.74 |
| 2026-06-10 12:00 |
22:36:32.68 |
-18:21:07.1 |
HIP 111603 |
4.94 |
| 2026-06-11 00:00 |
22:36:31.83 |
-18:21:17.2 |
HIP 111603 |
5.14 |
| 2026-06-11 12:00 |
22:36:30.95 |
-18:21:27.4 |
HIP 111603 |
5.36 |
| 2026-06-12 00:00 |
22:36:30.03 |
-18:21:37.8 |
HIP 111603 |
5.59 |
| 2026-06-12 12:00 |
22:36:29.08 |
-18:21:48.5 |
HIP 111603 |
5.82 |
| 2026-06-13 00:00 |
22:36:28.08 |
-18:21:59.3 |
HIP 111603 |
6.07 |
| 2026-06-13 12:00 |
22:36:27.05 |
-18:22:10.3 |
HIP 111603 |
6.33 |
| 2026-06-14 00:00 |
22:36:25.98 |
-18:22:21.5 |
HIP 111603 |
6.60 |
| 2026-06-14 12:00 |
22:36:24.87 |
-18:22:32.9 |
HIP 111603 |
6.88 |
| 2026-06-15 00:00 |
22:36:23.72 |
-18:22:44.5 |
HIP 111603 |
7.17 |
| 2026-06-15 12:00 |
22:36:22.54 |
-18:22:56.2 |
HIP 111603 |
7.47 |
| 2026-06-16 00:00 |
22:36:21.32 |
-18:23:08.2 |
HIP 111603 |
7.78 |
| 2026-06-16 12:00 |
22:36:20.06 |
-18:23:20.3 |
HIP 111603 |
8.10 |
| 2026-06-17 00:00 |
22:36:18.76 |
-18:23:32.6 |
HIP 111603 |
8.43 |
| 2026-06-17 12:00 |
22:36:17.43 |
-18:23:45.1 |
HIP 111603 |
8.77 |
| 2026-06-18 00:00 |
22:36:16.05 |
-18:23:57.8 |
HIP 111603 |
9.13 |
| 2026-06-18 12:00 |
22:36:14.65 |
-18:24:10.6 |
HIP 111603 |
9.49 |
| 2026-06-19 00:00 |
22:36:13.20 |
-18:24:23.7 |
HIP 111603 |
9.86 |
| 2026-06-19 12:00 |
22:36:11.72 |
-18:24:36.9 |
HIP 111603 |
10.24 |
| 2026-06-20 00:00 |
22:36:10.20 |
-18:24:50.2 |
HIP 111603 |
10.63 |
| 2026-06-20 12:00 |
22:36:08.64 |
-18:25:03.8 |
HIP 111603 |
11.04 |
| 2026-06-21 00:00 |
22:36:07.05 |
-18:25:17.5 |
HIP 111603 |
11.45 |
| 2026-06-21 12:00 |
22:36:05.42 |
-18:25:31.4 |
HIP 111603 |
11.87 |
| 2026-06-22 00:00 |
22:36:03.76 |
-18:25:45.4 |
HIP 111603 |
12.30 |