C/2014 AA52 (Catalina)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 AA52 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-02-27T15:22:13.177920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:46Z |
| Obs used |
399 |
| NEO |
- |
| M1 |
13.600 |
| 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) |
2014-10-20.0000000 |
| e |
1.00042389 |
| q (au) |
2.002638 |
| a (au) |
-4724.452107 |
| i (deg) |
105.211201 |
| Ω (om, deg) |
330.493052 |
| ω (w, deg) |
292.259254 |
| M (ma, deg) |
-0.000397 |
等級
散乱 + 全体線形
$$
M_a = (11.277 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.277 |
| n |
2.000 |
| gf |
0.997 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
18:17:16.55 |
+46:54:25.5 |
HIP 89694 |
31.79 |
| 2026-02-03 12:00 |
18:17:21.25 |
+46:55:10.7 |
HIP 89694 |
32.25 |
| 2026-02-04 00:00 |
18:17:25.91 |
+46:55:56.2 |
HIP 89694 |
32.75 |
| 2026-02-04 12:00 |
18:17:30.54 |
+46:56:42.2 |
HIP 89694 |
33.28 |
| 2026-02-05 00:00 |
18:17:35.13 |
+46:57:28.5 |
HIP 89914 |
33.57 |
| 2026-02-05 12:00 |
18:17:39.68 |
+46:58:15.3 |
HIP 89914 |
32.74 |
| 2026-02-06 00:00 |
18:17:44.20 |
+46:59:02.5 |
HIP 89914 |
31.94 |
| 2026-02-06 12:00 |
18:17:48.68 |
+46:59:50.0 |
HIP 89914 |
31.16 |
| 2026-02-07 00:00 |
18:17:53.12 |
+47:00:38.0 |
HIP 89914 |
30.41 |
| 2026-02-07 12:00 |
18:17:57.52 |
+47:01:26.3 |
HIP 89914 |
29.69 |
| 2026-02-08 00:00 |
18:18:01.88 |
+47:02:15.1 |
HIP 89914 |
29.00 |
| 2026-02-08 12:00 |
18:18:06.21 |
+47:03:04.2 |
HIP 89914 |
28.34 |
| 2026-02-09 00:00 |
18:18:10.49 |
+47:03:53.7 |
HIP 89914 |
27.72 |
| 2026-02-09 12:00 |
18:18:14.74 |
+47:04:43.6 |
HIP 89914 |
27.14 |
| 2026-02-10 00:00 |
18:18:18.94 |
+47:05:33.9 |
HIP 89914 |
26.59 |
| 2026-02-10 12:00 |
18:18:23.11 |
+47:06:24.6 |
HIP 89914 |
26.10 |
| 2026-02-11 00:00 |
18:18:27.23 |
+47:07:15.6 |
HIP 89914 |
25.65 |
| 2026-02-11 12:00 |
18:18:31.32 |
+47:08:07.0 |
HIP 89914 |
25.24 |
| 2026-02-12 00:00 |
18:18:35.36 |
+47:08:58.7 |
HIP 89914 |
24.89 |
| 2026-02-12 12:00 |
18:18:39.36 |
+47:09:50.9 |
HIP 89914 |
24.60 |
| 2026-02-13 00:00 |
18:18:43.31 |
+47:10:43.3 |
HIP 89914 |
24.36 |
| 2026-02-13 12:00 |
18:18:47.23 |
+47:11:36.2 |
HIP 89914 |
24.18 |
| 2026-02-14 00:00 |
18:18:51.10 |
+47:12:29.4 |
HIP 89914 |
24.05 |
| 2026-02-14 12:00 |
18:18:54.93 |
+47:13:22.9 |
HIP 89914 |
23.99 |
| 2026-02-15 00:00 |
18:18:58.71 |
+47:14:16.8 |
HIP 89914 |
23.99 |
| 2026-02-15 12:00 |
18:19:02.45 |
+47:15:11.0 |
HIP 89914 |
24.04 |
| 2026-02-16 00:00 |
18:19:06.15 |
+47:16:05.5 |
HIP 89914 |
24.16 |
| 2026-02-16 12:00 |
18:19:09.80 |
+47:17:00.4 |
HIP 89914 |
24.34 |
| 2026-02-17 00:00 |
18:19:13.40 |
+47:17:55.6 |
HIP 89914 |
24.57 |
| 2026-02-17 12:00 |
18:19:16.97 |
+47:18:51.2 |
HIP 89914 |
24.86 |
| 2026-02-18 00:00 |
18:19:20.48 |
+47:19:47.0 |
HIP 89914 |
25.21 |
| 2026-02-18 12:00 |
18:19:23.95 |
+47:20:43.2 |
HIP 89914 |
25.61 |
| 2026-02-19 00:00 |
18:19:27.37 |
+47:21:39.7 |
HIP 89914 |
26.05 |
| 2026-02-19 12:00 |
18:19:30.74 |
+47:22:36.5 |
HIP 89914 |
26.55 |
| 2026-02-20 00:00 |
18:19:34.07 |
+47:23:33.6 |
HIP 89914 |
27.09 |
| 2026-02-20 12:00 |
18:19:37.35 |
+47:24:31.0 |
HIP 89914 |
27.67 |
| 2026-02-21 00:00 |
18:19:40.59 |
+47:25:28.7 |
HIP 89914 |
28.29 |
| 2026-02-21 12:00 |
18:19:43.77 |
+47:26:26.6 |
HIP 89914 |
28.95 |
| 2026-02-22 00:00 |
18:19:46.91 |
+47:27:24.9 |
HIP 89914 |
29.64 |
| 2026-02-22 12:00 |
18:19:49.99 |
+47:28:23.5 |
HIP 89914 |
30.37 |
| 2026-02-23 00:00 |
18:19:53.03 |
+47:29:22.3 |
HIP 89914 |
31.12 |
| 2026-02-23 12:00 |
18:19:56.02 |
+47:30:21.4 |
HIP 89914 |
31.90 |
| 2026-02-24 00:00 |
18:19:58.96 |
+47:31:20.8 |
HIP 89914 |
32.71 |