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) |
| 2026-03-26 00:00 |
18:21:17.11 |
+48:36:16.0 |
HIP 90025 |
17.13 |
| 2026-03-26 12:00 |
18:21:16.66 |
+48:37:23.6 |
HIP 90025 |
18.15 |
| 2026-03-27 00:00 |
18:21:16.16 |
+48:38:31.2 |
HIP 90025 |
19.18 |
| 2026-03-27 12:00 |
18:21:15.59 |
+48:39:38.7 |
HIP 90025 |
20.23 |
| 2026-03-28 00:00 |
18:21:14.96 |
+48:40:46.3 |
HIP 90025 |
21.29 |
| 2026-03-28 12:00 |
18:21:14.28 |
+48:41:53.8 |
HIP 90025 |
22.36 |
| 2026-03-29 00:00 |
18:21:13.53 |
+48:43:01.3 |
HIP 90025 |
23.44 |
| 2026-03-29 12:00 |
18:21:12.72 |
+48:44:08.7 |
HIP 89981 |
23.37 |
| 2026-03-30 00:00 |
18:21:11.86 |
+48:45:16.1 |
HIP 89981 |
22.28 |
| 2026-03-30 12:00 |
18:21:10.93 |
+48:46:23.5 |
HIP 89981 |
21.20 |
| 2026-03-31 00:00 |
18:21:09.95 |
+48:47:30.8 |
HIP 89981 |
20.12 |
| 2026-03-31 12:00 |
18:21:08.91 |
+48:48:38.0 |
HIP 89981 |
19.06 |
| 2026-04-01 00:00 |
18:21:07.80 |
+48:49:45.2 |
HIP 89981 |
18.00 |
| 2026-04-01 12:00 |
18:21:06.64 |
+48:50:52.3 |
HIP 89981 |
16.96 |
| 2026-04-02 00:00 |
18:21:05.42 |
+48:51:59.4 |
HIP 89981 |
15.94 |
| 2026-04-02 12:00 |
18:21:04.14 |
+48:53:06.3 |
HIP 89981 |
14.94 |
| 2026-04-03 00:00 |
18:21:02.80 |
+48:54:13.2 |
HIP 89981 |
13.96 |
| 2026-04-03 12:00 |
18:21:01.40 |
+48:55:20.0 |
HIP 89981 |
13.01 |
| 2026-04-04 00:00 |
18:20:59.94 |
+48:56:26.8 |
HIP 89981 |
12.10 |
| 2026-04-04 12:00 |
18:20:58.42 |
+48:57:33.4 |
HIP 89981 |
11.24 |
| 2026-04-05 00:00 |
18:20:56.84 |
+48:58:40.0 |
HIP 89981 |
10.43 |
| 2026-04-05 12:00 |
18:20:55.20 |
+48:59:46.4 |
HIP 89981 |
9.71 |
| 2026-04-06 00:00 |
18:20:53.50 |
+49:00:52.7 |
HIP 89981 |
9.07 |
| 2026-04-06 12:00 |
18:20:51.74 |
+49:01:59.0 |
HIP 89981 |
8.55 |
| 2026-04-07 00:00 |
18:20:49.93 |
+49:03:05.1 |
HIP 89981 |
8.17 |
| 2026-04-07 12:00 |
18:20:48.05 |
+49:04:11.1 |
HIP 89981 |
7.94 |
| 2026-04-08 00:00 |
18:20:46.11 |
+49:05:16.9 |
HIP 89981 |
7.88 |
| 2026-04-08 12:00 |
18:20:44.12 |
+49:06:22.7 |
HIP 89981 |
8.00 |
| 2026-04-09 00:00 |
18:20:42.06 |
+49:07:28.3 |
HIP 89981 |
8.28 |
| 2026-04-09 12:00 |
18:20:39.95 |
+49:08:33.7 |
HIP 89981 |
8.72 |
| 2026-04-10 00:00 |
18:20:37.78 |
+49:09:39.0 |
HIP 89981 |
9.29 |
| 2026-04-10 12:00 |
18:20:35.55 |
+49:10:44.2 |
HIP 89981 |
9.96 |
| 2026-04-11 00:00 |
18:20:33.26 |
+49:11:49.2 |
HIP 89981 |
10.72 |
| 2026-04-11 12:00 |
18:20:30.91 |
+49:12:54.1 |
HIP 89981 |
11.55 |
| 2026-04-12 00:00 |
18:20:28.50 |
+49:13:58.8 |
HIP 89981 |
12.44 |
| 2026-04-12 12:00 |
18:20:26.03 |
+49:15:03.3 |
HIP 89981 |
13.38 |
| 2026-04-13 00:00 |
18:20:23.51 |
+49:16:07.6 |
HIP 89981 |
14.35 |
| 2026-04-13 12:00 |
18:20:20.92 |
+49:17:11.8 |
HIP 89981 |
15.35 |
| 2026-04-14 00:00 |
18:20:18.28 |
+49:18:15.8 |
HIP 89981 |
16.37 |
| 2026-04-14 12:00 |
18:20:15.58 |
+49:19:19.6 |
HIP 89981 |
17.42 |
| 2026-04-15 00:00 |
18:20:12.82 |
+49:20:23.2 |
HIP 89981 |
18.48 |
| 2026-04-15 12:00 |
18:20:10.00 |
+49:21:26.6 |
HIP 89981 |
19.56 |
| 2026-04-16 00:00 |
18:20:07.12 |
+49:22:29.9 |
HIP 89981 |
20.65 |