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) |
| 2026-07-29 00:00 |
05:15:22.66 |
-61:10:50.6 |
HIP 24359 |
14.28 |
| 2026-07-29 12:00 |
05:15:28.49 |
-61:11:31.2 |
HIP 24359 |
15.21 |
| 2026-07-30 00:00 |
05:15:34.28 |
-61:12:12.3 |
HIP 24359 |
16.14 |
| 2026-07-30 12:00 |
05:15:40.01 |
-61:12:53.7 |
HIP 24359 |
17.07 |
| 2026-07-31 00:00 |
05:15:45.70 |
-61:13:35.4 |
HIP 24359 |
18.01 |
| 2026-07-31 12:00 |
05:15:51.33 |
-61:14:17.5 |
HIP 24359 |
18.95 |
| 2026-08-01 00:00 |
05:15:56.91 |
-61:15:00.0 |
HIP 24359 |
19.88 |
| 2026-08-01 12:00 |
05:16:02.45 |
-61:15:42.7 |
HIP 24359 |
20.82 |
| 2026-08-02 00:00 |
05:16:07.93 |
-61:16:25.8 |
HIP 24359 |
21.76 |
| 2026-08-02 12:00 |
05:16:13.35 |
-61:17:09.2 |
HIP 24359 |
22.70 |
| 2026-08-03 00:00 |
05:16:18.73 |
-61:17:53.0 |
HIP 24359 |
23.64 |
| 2026-08-03 12:00 |
05:16:24.05 |
-61:18:37.0 |
HIP 24359 |
24.58 |
| 2026-08-04 00:00 |
05:16:29.32 |
-61:19:21.5 |
HIP 24359 |
25.52 |
| 2026-08-04 12:00 |
05:16:34.54 |
-61:20:06.2 |
HIP 24359 |
26.46 |
| 2026-08-05 00:00 |
05:16:39.70 |
-61:20:51.3 |
HIP 24893 |
27.31 |
| 2026-08-05 12:00 |
05:16:44.80 |
-61:21:36.6 |
HIP 24893 |
27.06 |
| 2026-08-06 00:00 |
05:16:49.85 |
-61:22:22.3 |
HIP 24893 |
26.85 |
| 2026-08-06 12:00 |
05:16:54.85 |
-61:23:08.3 |
HIP 24893 |
26.68 |
| 2026-08-07 00:00 |
05:16:59.79 |
-61:23:54.6 |
HIP 24893 |
26.55 |
| 2026-08-07 12:00 |
05:17:04.67 |
-61:24:41.3 |
HIP 24893 |
26.47 |
| 2026-08-08 00:00 |
05:17:09.50 |
-61:25:28.2 |
HIP 24893 |
26.43 |
| 2026-08-08 12:00 |
05:17:14.26 |
-61:26:15.4 |
HIP 24893 |
26.44 |
| 2026-08-09 00:00 |
05:17:18.98 |
-61:27:02.9 |
HIP 24893 |
26.49 |
| 2026-08-09 12:00 |
05:17:23.63 |
-61:27:50.7 |
HIP 24893 |
26.58 |
| 2026-08-10 00:00 |
05:17:28.22 |
-61:28:38.8 |
HIP 24893 |
26.72 |
| 2026-08-10 12:00 |
05:17:32.76 |
-61:29:27.2 |
HIP 24893 |
26.91 |
| 2026-08-11 00:00 |
05:17:37.23 |
-61:30:15.9 |
HIP 24725 |
27.07 |
| 2026-08-11 12:00 |
05:17:41.65 |
-61:31:04.9 |
HIP 24725 |
26.19 |
| 2026-08-12 00:00 |
05:17:46.00 |
-61:31:54.1 |
HIP 24725 |
25.31 |
| 2026-08-12 12:00 |
05:17:50.29 |
-61:32:43.6 |
HIP 24725 |
24.44 |
| 2026-08-13 00:00 |
05:17:54.52 |
-61:33:33.4 |
HIP 24725 |
23.57 |
| 2026-08-13 12:00 |
05:17:58.69 |
-61:34:23.4 |
HIP 24725 |
22.70 |
| 2026-08-14 00:00 |
05:18:02.80 |
-61:35:13.7 |
HIP 24725 |
21.84 |
| 2026-08-14 12:00 |
05:18:06.85 |
-61:36:04.2 |
HIP 24725 |
20.98 |
| 2026-08-15 00:00 |
05:18:10.83 |
-61:36:55.0 |
HIP 24725 |
20.13 |
| 2026-08-15 12:00 |
05:18:14.75 |
-61:37:46.1 |
HIP 24725 |
19.29 |
| 2026-08-16 00:00 |
05:18:18.61 |
-61:38:37.4 |
HIP 24725 |
18.45 |
| 2026-08-16 12:00 |
05:18:22.40 |
-61:39:28.9 |
HIP 24725 |
17.62 |
| 2026-08-17 00:00 |
05:18:26.12 |
-61:40:20.7 |
HIP 24725 |
16.81 |
| 2026-08-17 12:00 |
05:18:29.79 |
-61:41:12.7 |
HIP 24725 |
16.00 |
| 2026-08-18 00:00 |
05:18:33.39 |
-61:42:05.0 |
HIP 24725 |
15.21 |
| 2026-08-18 12:00 |
05:18:36.92 |
-61:42:57.4 |
HIP 24725 |
14.43 |
| 2026-08-19 00:00 |
05:18:40.38 |
-61:43:50.1 |
HIP 24725 |
13.68 |