メタデータ
| 項目 |
値 |
| Designation |
C/2013 J6 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-04-09T13:32:09.997440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:35Z |
| Obs used |
129 |
| NEO |
- |
| M1 |
16.500 |
| 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) |
2013-05-27.0000000 |
| e |
0.95963357 |
| q (au) |
2.415721 |
| a (au) |
59.844807 |
| i (deg) |
85.054919 |
| Ω (om, deg) |
68.421264 |
| ω (w, deg) |
125.644531 |
| M (ma, deg) |
0.100989 |
等級
散乱 + 全体線形
$$
M_a = (15.836 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.836 |
| n |
2.000 |
| gf |
0.983 |
| gb |
-0.761 |
| k |
0.992 |
| δ90 |
9.946 |
| 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 |
05:00:29.46 |
-60:41:10.0 |
HIP 23346 |
6.35 |
| 2026-06-01 12:00 |
05:00:37.94 |
-60:40:57.7 |
HIP 23346 |
5.31 |
| 2026-06-02 00:00 |
05:00:46.42 |
-60:40:45.8 |
HIP 23346 |
4.28 |
| 2026-06-02 12:00 |
05:00:54.92 |
-60:40:34.4 |
HIP 23346 |
3.26 |
| 2026-06-03 00:00 |
05:01:03.41 |
-60:40:23.6 |
HIP 23346 |
2.30 |
| 2026-06-03 12:00 |
05:01:11.91 |
-60:40:13.2 |
HIP 23346 |
1.47 |
| 2026-06-04 00:00 |
05:01:20.41 |
-60:40:03.3 |
HIP 23346 |
1.14 |
| 2026-06-04 12:00 |
05:01:28.91 |
-60:39:53.9 |
HIP 23346 |
1.63 |
| 2026-06-05 00:00 |
05:01:37.42 |
-60:39:45.1 |
HIP 23346 |
2.50 |
| 2026-06-05 12:00 |
05:01:45.92 |
-60:39:36.7 |
HIP 23346 |
3.48 |
| 2026-06-06 00:00 |
05:01:54.43 |
-60:39:28.8 |
HIP 23346 |
4.49 |
| 2026-06-06 12:00 |
05:02:02.94 |
-60:39:21.5 |
HIP 23346 |
5.51 |
| 2026-06-07 00:00 |
05:02:11.45 |
-60:39:14.6 |
HIP 23346 |
6.55 |
| 2026-06-07 12:00 |
05:02:19.96 |
-60:39:08.2 |
HIP 23346 |
7.59 |
| 2026-06-08 00:00 |
05:02:28.47 |
-60:39:02.4 |
HIP 23346 |
8.63 |
| 2026-06-08 12:00 |
05:02:36.97 |
-60:38:57.0 |
HIP 23346 |
9.67 |
| 2026-06-09 00:00 |
05:02:45.48 |
-60:38:52.1 |
HIP 23346 |
10.71 |
| 2026-06-09 12:00 |
05:02:53.98 |
-60:38:47.8 |
HIP 23346 |
11.76 |
| 2026-06-10 00:00 |
05:03:02.48 |
-60:38:43.9 |
HIP 23346 |
12.80 |
| 2026-06-10 12:00 |
05:03:10.98 |
-60:38:40.6 |
HIP 23346 |
13.84 |
| 2026-06-11 00:00 |
05:03:19.47 |
-60:38:37.7 |
HIP 23346 |
14.88 |
| 2026-06-11 12:00 |
05:03:27.96 |
-60:38:35.4 |
HIP 23346 |
15.92 |
| 2026-06-12 00:00 |
05:03:36.44 |
-60:38:33.5 |
HIP 23346 |
16.96 |
| 2026-06-12 12:00 |
05:03:44.92 |
-60:38:32.2 |
HIP 23346 |
18.00 |
| 2026-06-13 00:00 |
05:03:53.39 |
-60:38:31.3 |
HIP 23346 |
19.04 |
| 2026-06-13 12:00 |
05:04:01.86 |
-60:38:31.0 |
HIP 23346 |
20.08 |
| 2026-06-14 00:00 |
05:04:10.32 |
-60:38:31.2 |
HIP 23763 |
21.02 |
| 2026-06-14 12:00 |
05:04:18.77 |
-60:38:31.8 |
HIP 23763 |
20.20 |
| 2026-06-15 00:00 |
05:04:27.22 |
-60:38:33.0 |
HIP 23763 |
19.39 |
| 2026-06-15 12:00 |
05:04:35.65 |
-60:38:34.7 |
HIP 23763 |
18.60 |
| 2026-06-16 00:00 |
05:04:44.08 |
-60:38:36.9 |
HIP 23763 |
17.84 |
| 2026-06-16 12:00 |
05:04:52.50 |
-60:38:39.5 |
HIP 23763 |
17.09 |
| 2026-06-17 00:00 |
05:05:00.90 |
-60:38:42.7 |
HIP 23763 |
16.37 |
| 2026-06-17 12:00 |
05:05:09.30 |
-60:38:46.4 |
HIP 23763 |
15.68 |
| 2026-06-18 00:00 |
05:05:17.68 |
-60:38:50.6 |
HIP 23763 |
15.03 |
| 2026-06-18 12:00 |
05:05:26.06 |
-60:38:55.2 |
HIP 23763 |
14.40 |
| 2026-06-19 00:00 |
05:05:34.42 |
-60:39:00.4 |
HIP 23763 |
13.83 |
| 2026-06-19 12:00 |
05:05:42.77 |
-60:39:06.1 |
HIP 23763 |
13.29 |
| 2026-06-20 00:00 |
05:05:51.10 |
-60:39:12.2 |
HIP 23763 |
12.81 |
| 2026-06-20 12:00 |
05:05:59.42 |
-60:39:18.9 |
HIP 23763 |
12.39 |
| 2026-06-21 00:00 |
05:06:07.73 |
-60:39:26.0 |
HIP 23763 |
12.04 |
| 2026-06-21 12:00 |
05:06:16.02 |
-60:39:33.6 |
HIP 23763 |
11.75 |
| 2026-06-22 00:00 |
05:06:24.30 |
-60:39:41.8 |
HIP 23763 |
11.54 |