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) |
| 2026-09-25 00:00 |
05:19:35.63 |
-62:54:17.1 |
HIP 24779 |
7.60 |
| 2026-09-25 12:00 |
05:19:33.46 |
-62:55:14.5 |
HIP 24779 |
6.82 |
| 2026-09-26 00:00 |
05:19:31.21 |
-62:56:11.7 |
HIP 24779 |
6.11 |
| 2026-09-26 12:00 |
05:19:28.88 |
-62:57:08.8 |
HIP 24779 |
5.47 |
| 2026-09-27 00:00 |
05:19:26.47 |
-62:58:05.7 |
HIP 24779 |
4.93 |
| 2026-09-27 12:00 |
05:19:23.98 |
-62:59:02.6 |
HIP 24779 |
4.55 |
| 2026-09-28 00:00 |
05:19:21.41 |
-62:59:59.3 |
HIP 24779 |
4.35 |
| 2026-09-28 12:00 |
05:19:18.75 |
-63:00:55.9 |
HIP 24779 |
4.36 |
| 2026-09-29 00:00 |
05:19:16.02 |
-63:01:52.3 |
HIP 24779 |
4.58 |
| 2026-09-29 12:00 |
05:19:13.21 |
-63:02:48.6 |
HIP 24779 |
4.98 |
| 2026-09-30 00:00 |
05:19:10.32 |
-63:03:44.8 |
HIP 24779 |
5.53 |
| 2026-09-30 12:00 |
05:19:07.35 |
-63:04:40.8 |
HIP 24779 |
6.18 |
| 2026-10-01 00:00 |
05:19:04.30 |
-63:05:36.6 |
HIP 24779 |
6.91 |
| 2026-10-01 12:00 |
05:19:01.16 |
-63:06:32.3 |
HIP 24887 |
7.51 |
| 2026-10-02 00:00 |
05:18:57.95 |
-63:07:27.8 |
HIP 24887 |
8.16 |
| 2026-10-02 12:00 |
05:18:54.66 |
-63:08:23.1 |
HIP 24887 |
8.88 |
| 2026-10-03 00:00 |
05:18:51.29 |
-63:09:18.2 |
HIP 24887 |
9.66 |
| 2026-10-03 12:00 |
05:18:47.84 |
-63:10:13.2 |
HIP 24887 |
10.47 |
| 2026-10-04 00:00 |
05:18:44.31 |
-63:11:08.0 |
HIP 24887 |
11.32 |
| 2026-10-04 12:00 |
05:18:40.70 |
-63:12:02.6 |
HIP 24887 |
12.20 |
| 2026-10-05 00:00 |
05:18:37.01 |
-63:12:56.9 |
HIP 24887 |
13.10 |
| 2026-10-05 12:00 |
05:18:33.24 |
-63:13:51.1 |
HIP 24887 |
14.02 |
| 2026-10-06 00:00 |
05:18:29.39 |
-63:14:45.1 |
HIP 24887 |
14.95 |
| 2026-10-06 12:00 |
05:18:25.46 |
-63:15:38.9 |
HIP 24887 |
15.89 |
| 2026-10-07 00:00 |
05:18:21.45 |
-63:16:32.4 |
HIP 24887 |
16.85 |
| 2026-10-07 12:00 |
05:18:17.36 |
-63:17:25.7 |
HIP 24536 |
16.65 |
| 2026-10-08 00:00 |
05:18:13.20 |
-63:18:18.8 |
HIP 24536 |
16.04 |
| 2026-10-08 12:00 |
05:18:08.95 |
-63:19:11.7 |
HIP 24536 |
15.47 |
| 2026-10-09 00:00 |
05:18:04.63 |
-63:20:04.3 |
HIP 24536 |
14.93 |
| 2026-10-09 12:00 |
05:18:00.23 |
-63:20:56.6 |
HIP 24536 |
14.43 |
| 2026-10-10 00:00 |
05:17:55.75 |
-63:21:48.8 |
HIP 24536 |
13.98 |
| 2026-10-10 12:00 |
05:17:51.19 |
-63:22:40.6 |
HIP 24536 |
13.58 |
| 2026-10-11 00:00 |
05:17:46.56 |
-63:23:32.2 |
HIP 24536 |
13.23 |
| 2026-10-11 12:00 |
05:17:41.84 |
-63:24:23.6 |
HIP 24536 |
12.95 |
| 2026-10-12 00:00 |
05:17:37.05 |
-63:25:14.6 |
HIP 24536 |
12.73 |
| 2026-10-12 12:00 |
05:17:32.19 |
-63:26:05.4 |
HIP 24536 |
12.57 |
| 2026-10-13 00:00 |
05:17:27.24 |
-63:26:56.0 |
HIP 24536 |
12.49 |
| 2026-10-13 12:00 |
05:17:22.23 |
-63:27:46.2 |
HIP 24536 |
12.48 |
| 2026-10-14 00:00 |
05:17:17.13 |
-63:28:36.1 |
HIP 24536 |
12.54 |
| 2026-10-14 12:00 |
05:17:11.96 |
-63:29:25.8 |
HIP 24536 |
12.67 |
| 2026-10-15 00:00 |
05:17:06.71 |
-63:30:15.1 |
HIP 24536 |
12.87 |
| 2026-10-15 12:00 |
05:17:01.39 |
-63:31:04.1 |
HIP 24536 |
13.14 |
| 2026-10-16 00:00 |
05:16:56.00 |
-63:31:52.9 |
HIP 24536 |
13.47 |