C/2013 L2 (Catalina)
メタデータ
| 項目 |
値 |
| Designation |
C/2013 L2 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-05-11T04:41:32.150400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:37Z |
| Obs used |
242 |
| NEO |
- |
| M1 |
12.300 |
| 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) |
2013-06-27.0000000 |
| e |
1.00092750 |
| q (au) |
4.872285 |
| a (au) |
-5253.163467 |
| i (deg) |
106.776427 |
| Ω (om, deg) |
285.877705 |
| ω (w, deg) |
1.941215 |
| M (ma, deg) |
0.001066 |
等級
散乱 + 全体線形
$$
M_a = (10.956 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.956 |
| n |
2.000 |
| gf |
1.000 |
| 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) |
| 2026-02-03 00:00 |
09:44:53.10 |
+63:16:53.4 |
HIP 48034 |
17.84 |
| 2026-02-03 12:00 |
09:44:43.24 |
+63:17:11.3 |
HIP 48034 |
18.97 |
| 2026-02-04 00:00 |
09:44:33.37 |
+63:17:28.7 |
HIP 48034 |
20.11 |
| 2026-02-04 12:00 |
09:44:23.48 |
+63:17:45.7 |
HIP 48034 |
21.25 |
| 2026-02-05 00:00 |
09:44:13.58 |
+63:18:02.2 |
HIP 48034 |
22.39 |
| 2026-02-05 12:00 |
09:44:03.67 |
+63:18:18.3 |
HIP 47675 |
23.34 |
| 2026-02-06 00:00 |
09:43:53.75 |
+63:18:33.9 |
HIP 47675 |
23.36 |
| 2026-02-06 12:00 |
09:43:43.82 |
+63:18:49.0 |
HIP 47675 |
23.42 |
| 2026-02-07 00:00 |
09:43:33.88 |
+63:19:03.7 |
HIP 47675 |
23.54 |
| 2026-02-07 12:00 |
09:43:23.93 |
+63:19:17.9 |
HIP 47675 |
23.71 |
| 2026-02-08 00:00 |
09:43:13.98 |
+63:19:31.7 |
HIP 47675 |
23.92 |
| 2026-02-08 12:00 |
09:43:04.01 |
+63:19:44.9 |
HIP 47675 |
24.17 |
| 2026-02-09 00:00 |
09:42:54.04 |
+63:19:57.7 |
HIP 47675 |
24.47 |
| 2026-02-09 12:00 |
09:42:44.07 |
+63:20:10.1 |
HIP 47675 |
24.81 |
| 2026-02-10 00:00 |
09:42:34.09 |
+63:20:21.9 |
HIP 47675 |
25.19 |
| 2026-02-10 12:00 |
09:42:24.11 |
+63:20:33.3 |
HIP 47675 |
25.61 |
| 2026-02-11 00:00 |
09:42:14.13 |
+63:20:44.2 |
HIP 47675 |
26.07 |
| 2026-02-11 12:00 |
09:42:04.14 |
+63:20:54.7 |
HIP 47675 |
26.55 |
| 2026-02-12 00:00 |
09:41:54.16 |
+63:21:04.6 |
HIP 47675 |
27.07 |
| 2026-02-12 12:00 |
09:41:44.17 |
+63:21:14.1 |
HIP 47675 |
27.62 |
| 2026-02-13 00:00 |
09:41:34.19 |
+63:21:23.1 |
HIP 47675 |
28.20 |
| 2026-02-13 12:00 |
09:41:24.21 |
+63:21:31.6 |
HIP 47675 |
28.80 |
| 2026-02-14 00:00 |
09:41:14.23 |
+63:21:39.7 |
HIP 47675 |
29.43 |
| 2026-02-14 12:00 |
09:41:04.26 |
+63:21:47.2 |
HIP 47675 |
30.08 |
| 2026-02-15 00:00 |
09:40:54.29 |
+63:21:54.3 |
HIP 47675 |
30.75 |
| 2026-02-15 12:00 |
09:40:44.32 |
+63:22:00.9 |
HIP 47675 |
31.44 |
| 2026-02-16 00:00 |
09:40:34.37 |
+63:22:07.0 |
HIP 47675 |
32.15 |
| 2026-02-16 12:00 |
09:40:24.42 |
+63:22:12.6 |
HIP 47675 |
32.87 |
| 2026-02-17 00:00 |
09:40:14.48 |
+63:22:17.7 |
HIP 47675 |
33.61 |
| 2026-02-17 12:00 |
09:40:04.55 |
+63:22:22.4 |
HIP 47062 |
33.30 |
| 2026-02-18 00:00 |
09:39:54.63 |
+63:22:26.5 |
HIP 47062 |
32.28 |
| 2026-02-18 12:00 |
09:39:44.73 |
+63:22:30.2 |
HIP 47062 |
31.27 |
| 2026-02-19 00:00 |
09:39:34.83 |
+63:22:33.4 |
HIP 47062 |
30.26 |
| 2026-02-19 12:00 |
09:39:24.95 |
+63:22:36.1 |
HIP 47062 |
29.26 |
| 2026-02-20 00:00 |
09:39:15.08 |
+63:22:38.3 |
HIP 47062 |
28.27 |
| 2026-02-20 12:00 |
09:39:05.23 |
+63:22:40.0 |
HIP 47062 |
27.28 |
| 2026-02-21 00:00 |
09:38:55.40 |
+63:22:41.2 |
HIP 47062 |
26.30 |
| 2026-02-21 12:00 |
09:38:45.58 |
+63:22:42.0 |
HIP 47062 |
25.33 |
| 2026-02-22 00:00 |
09:38:35.78 |
+63:22:42.2 |
HIP 47062 |
24.37 |
| 2026-02-22 12:00 |
09:38:26.00 |
+63:22:42.0 |
HIP 47062 |
23.42 |
| 2026-02-23 00:00 |
09:38:16.23 |
+63:22:41.3 |
HIP 47062 |
22.47 |
| 2026-02-23 12:00 |
09:38:06.49 |
+63:22:40.1 |
HIP 47062 |
21.55 |
| 2026-02-24 00:00 |
09:37:56.77 |
+63:22:38.4 |
HIP 47062 |
20.63 |