メタデータ
| 項目 |
値 |
| Designation |
319P/Catalina-McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-07-01T22:02:55.170240Z |
| Orbit solution date (soln_date, UTC) |
2025-04-24T09:42:33Z |
| Obs used |
371 |
| NEO |
Yes |
| M1 |
17.100 |
| K1 |
8.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-10-04.0000000 |
| e |
0.66499524 |
| q (au) |
1.196987 |
| a (au) |
3.573045 |
| i (deg) |
15.074177 |
| Ω (om, deg) |
111.366470 |
| ω (w, deg) |
203.679689 |
| M (ma, deg) |
267.200002 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
09:26:25.04 |
+23:44:14.7 |
HIP 46119 |
30.46 |
| 2026-06-01 12:00 |
09:26:37.02 |
+23:42:57.7 |
HIP 46427 |
32.52 |
| 2026-06-02 00:00 |
09:26:49.13 |
+23:41:40.3 |
HIP 46427 |
29.84 |
| 2026-06-02 12:00 |
09:27:01.36 |
+23:40:22.4 |
HIP 46427 |
27.23 |
| 2026-06-03 00:00 |
09:27:13.72 |
+23:39:04.1 |
HIP 46427 |
24.70 |
| 2026-06-03 12:00 |
09:27:26.21 |
+23:37:45.4 |
HIP 46427 |
22.31 |
| 2026-06-04 00:00 |
09:27:38.82 |
+23:36:26.1 |
HIP 46427 |
20.12 |
| 2026-06-04 12:00 |
09:27:51.55 |
+23:35:06.5 |
HIP 46427 |
18.20 |
| 2026-06-05 00:00 |
09:28:04.40 |
+23:33:46.4 |
HIP 46427 |
16.68 |
| 2026-06-05 12:00 |
09:28:17.38 |
+23:32:25.9 |
HIP 46427 |
15.69 |
| 2026-06-06 00:00 |
09:28:30.47 |
+23:31:04.9 |
HIP 46427 |
15.34 |
| 2026-06-06 12:00 |
09:28:43.69 |
+23:29:43.5 |
HIP 46427 |
15.71 |
| 2026-06-07 00:00 |
09:28:57.02 |
+23:28:21.7 |
HIP 46427 |
16.76 |
| 2026-06-07 12:00 |
09:29:10.48 |
+23:26:59.5 |
HIP 46427 |
18.38 |
| 2026-06-08 00:00 |
09:29:24.05 |
+23:25:36.8 |
HIP 46427 |
20.47 |
| 2026-06-08 12:00 |
09:29:37.73 |
+23:24:13.8 |
HIP 46427 |
22.89 |
| 2026-06-09 00:00 |
09:29:51.53 |
+23:22:50.3 |
HIP 46427 |
25.58 |
| 2026-06-09 12:00 |
09:30:05.45 |
+23:21:26.4 |
HIP 46427 |
28.45 |
| 2026-06-10 00:00 |
09:30:19.48 |
+23:20:02.1 |
HIP 46750 |
29.20 |
| 2026-06-10 12:00 |
09:30:33.63 |
+23:18:37.4 |
HIP 46750 |
26.04 |
| 2026-06-11 00:00 |
09:30:47.88 |
+23:17:12.3 |
HIP 46750 |
22.97 |
| 2026-06-11 12:00 |
09:31:02.25 |
+23:15:46.7 |
HIP 46750 |
20.05 |
| 2026-06-12 00:00 |
09:31:16.73 |
+23:14:20.8 |
HIP 46750 |
17.37 |
| 2026-06-12 12:00 |
09:31:31.32 |
+23:12:54.5 |
HIP 46750 |
15.08 |
| 2026-06-13 00:00 |
09:31:46.02 |
+23:11:27.8 |
HIP 46750 |
13.40 |
| 2026-06-13 12:00 |
09:32:00.83 |
+23:10:00.7 |
HIP 46750 |
12.60 |
| 2026-06-14 00:00 |
09:32:15.74 |
+23:08:33.3 |
HIP 46750 |
12.87 |
| 2026-06-14 12:00 |
09:32:30.77 |
+23:07:05.4 |
HIP 46750 |
14.17 |
| 2026-06-15 00:00 |
09:32:45.89 |
+23:05:37.2 |
HIP 46750 |
16.27 |
| 2026-06-15 12:00 |
09:33:01.13 |
+23:04:08.6 |
HIP 46750 |
18.92 |
| 2026-06-16 00:00 |
09:33:16.46 |
+23:02:39.7 |
HIP 46750 |
21.93 |
| 2026-06-16 12:00 |
09:33:31.90 |
+23:01:10.4 |
HIP 46750 |
25.20 |
| 2026-06-17 00:00 |
09:33:47.44 |
+22:59:40.7 |
HIP 46938 |
27.70 |
| 2026-06-17 12:00 |
09:34:03.09 |
+22:58:10.6 |
HIP 46938 |
29.08 |
| 2026-06-18 00:00 |
09:34:18.83 |
+22:56:40.2 |
HIP 47112 |
28.47 |
| 2026-06-18 12:00 |
09:34:34.67 |
+22:55:09.5 |
HIP 47112 |
26.34 |
| 2026-06-19 00:00 |
09:34:50.61 |
+22:53:38.4 |
HIP 47112 |
24.65 |
| 2026-06-19 12:00 |
09:35:06.65 |
+22:52:07.0 |
HIP 47112 |
23.51 |
| 2026-06-20 00:00 |
09:35:22.78 |
+22:50:35.3 |
HIP 47112 |
23.01 |
| 2026-06-20 12:00 |
09:35:39.01 |
+22:49:03.2 |
HIP 47201 |
22.55 |
| 2026-06-21 00:00 |
09:35:55.33 |
+22:47:30.7 |
HIP 47201 |
18.49 |
| 2026-06-21 12:00 |
09:36:11.75 |
+22:45:58.0 |
HIP 47201 |
14.42 |
| 2026-06-22 00:00 |
09:36:28.26 |
+22:44:24.9 |
HIP 47201 |
10.33 |