メタデータ
| 項目 |
値 |
| Designation |
350P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2026-03-16T05:59:52.198080Z |
| Orbit solution date (soln_date, UTC) |
2026-05-22T14:52:41Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
18.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-11-30.0000000 |
| e |
0.09325715 |
| q (au) |
3.703921 |
| a (au) |
4.084864 |
| i (deg) |
7.363694 |
| Ω (om, deg) |
65.293607 |
| ω (w, deg) |
139.619997 |
| M (ma, deg) |
216.473391 |
等級
散乱 + 全体線形
$$
M_a = (13.506 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.506 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.762 |
| k |
0.800 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
13:40:41.45 |
-05:36:02.2 |
HIP 66706 |
21.70 |
| 2026-06-01 12:00 |
13:40:33.39 |
-05:36:25.7 |
HIP 66706 |
21.80 |
| 2026-06-02 00:00 |
13:40:25.57 |
-05:36:50.5 |
HIP 66706 |
22.12 |
| 2026-06-02 12:00 |
13:40:18.00 |
-05:37:16.9 |
HIP 66706 |
22.63 |
| 2026-06-03 00:00 |
13:40:10.66 |
-05:37:44.6 |
HIP 66706 |
23.31 |
| 2026-06-03 12:00 |
13:40:03.57 |
-05:38:13.8 |
HIP 66706 |
24.12 |
| 2026-06-04 00:00 |
13:39:56.73 |
-05:38:44.4 |
HIP 66706 |
25.05 |
| 2026-06-04 12:00 |
13:39:50.12 |
-05:39:16.5 |
HIP 66706 |
26.07 |
| 2026-06-05 00:00 |
13:39:43.77 |
-05:39:49.9 |
HIP 66706 |
27.15 |
| 2026-06-05 12:00 |
13:39:37.66 |
-05:40:24.8 |
HIP 66706 |
28.29 |
| 2026-06-06 00:00 |
13:39:31.79 |
-05:41:01.2 |
HIP 66706 |
29.47 |
| 2026-06-06 12:00 |
13:39:26.18 |
-05:41:38.9 |
HIP 66706 |
30.68 |
| 2026-06-07 00:00 |
13:39:20.81 |
-05:42:18.1 |
HIP 66706 |
31.91 |
| 2026-06-07 12:00 |
13:39:15.69 |
-05:42:58.7 |
HIP 66587 |
31.49 |
| 2026-06-08 00:00 |
13:39:10.82 |
-05:43:40.7 |
HIP 66443 |
30.36 |
| 2026-06-08 12:00 |
13:39:06.19 |
-05:44:24.2 |
HIP 66443 |
29.04 |
| 2026-06-09 00:00 |
13:39:01.82 |
-05:45:09.0 |
HIP 66443 |
27.78 |
| 2026-06-09 12:00 |
13:38:57.70 |
-05:45:55.3 |
HIP 66443 |
26.57 |
| 2026-06-10 00:00 |
13:38:53.83 |
-05:46:43.0 |
HIP 66443 |
25.43 |
| 2026-06-10 12:00 |
13:38:50.21 |
-05:47:32.1 |
HIP 66443 |
24.35 |
| 2026-06-11 00:00 |
13:38:46.84 |
-05:48:22.6 |
HIP 66443 |
23.34 |
| 2026-06-11 12:00 |
13:38:43.73 |
-05:49:14.5 |
HIP 66443 |
22.41 |
| 2026-06-12 00:00 |
13:38:40.87 |
-05:50:07.9 |
HIP 66443 |
21.56 |
| 2026-06-12 12:00 |
13:38:38.26 |
-05:51:02.6 |
HIP 66443 |
20.79 |
| 2026-06-13 00:00 |
13:38:35.90 |
-05:51:58.7 |
HIP 66443 |
20.12 |
| 2026-06-13 12:00 |
13:38:33.79 |
-05:52:56.3 |
HIP 66443 |
19.55 |
| 2026-06-14 00:00 |
13:38:31.94 |
-05:53:55.2 |
HIP 66443 |
19.09 |
| 2026-06-14 12:00 |
13:38:30.34 |
-05:54:55.5 |
HIP 66443 |
18.75 |
| 2026-06-15 00:00 |
13:38:29.00 |
-05:55:57.2 |
HIP 66443 |
18.52 |
| 2026-06-15 12:00 |
13:38:27.91 |
-05:57:00.3 |
HIP 66443 |
18.43 |
| 2026-06-16 00:00 |
13:38:27.07 |
-05:58:04.7 |
HIP 66587 |
17.91 |
| 2026-06-16 12:00 |
13:38:26.49 |
-05:59:10.5 |
HIP 66587 |
17.00 |
| 2026-06-17 00:00 |
13:38:26.16 |
-06:00:17.7 |
HIP 66587 |
16.06 |
| 2026-06-17 12:00 |
13:38:26.08 |
-06:01:26.3 |
HIP 66587 |
15.10 |
| 2026-06-18 00:00 |
13:38:26.26 |
-06:02:36.2 |
HIP 66587 |
14.10 |
| 2026-06-18 12:00 |
13:38:26.69 |
-06:03:47.4 |
HIP 66587 |
13.08 |
| 2026-06-19 00:00 |
13:38:27.37 |
-06:05:00.0 |
HIP 66587 |
12.03 |
| 2026-06-19 12:00 |
13:38:28.30 |
-06:06:13.9 |
HIP 66587 |
10.96 |
| 2026-06-20 00:00 |
13:38:29.48 |
-06:07:29.2 |
HIP 66587 |
9.87 |
| 2026-06-20 12:00 |
13:38:30.92 |
-06:08:45.7 |
HIP 66587 |
8.77 |
| 2026-06-21 00:00 |
13:38:32.60 |
-06:10:03.6 |
HIP 66587 |
7.67 |
| 2026-06-21 12:00 |
13:38:34.53 |
-06:11:22.7 |
HIP 66587 |
6.61 |
| 2026-06-22 00:00 |
13:38:36.71 |
-06:12:43.2 |
HIP 66587 |
5.64 |