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) |
| 2026-07-29 00:00 |
13:51:49.73 |
-08:42:36.0 |
HIP 67855 |
33.84 |
| 2026-07-29 12:00 |
13:52:08.09 |
-08:45:10.9 |
HIP 67855 |
30.99 |
| 2026-07-30 00:00 |
13:52:26.62 |
-08:47:46.5 |
HIP 67855 |
28.80 |
| 2026-07-30 12:00 |
13:52:45.34 |
-08:50:22.8 |
HIP 67855 |
27.43 |
| 2026-07-31 00:00 |
13:53:04.22 |
-08:52:59.7 |
HIP 67855 |
27.05 |
| 2026-07-31 12:00 |
13:53:23.28 |
-08:55:37.2 |
HIP 67855 |
27.71 |
| 2026-08-01 00:00 |
13:53:42.52 |
-08:58:15.4 |
HIP 67855 |
29.37 |
| 2026-08-01 12:00 |
13:54:01.93 |
-09:00:54.3 |
HIP 67967 |
28.52 |
| 2026-08-02 00:00 |
13:54:21.50 |
-09:03:33.7 |
HIP 67967 |
28.51 |
| 2026-08-02 12:00 |
13:54:41.25 |
-09:06:13.8 |
HIP 68001 |
28.16 |
| 2026-08-03 00:00 |
13:55:01.17 |
-09:08:54.5 |
HIP 68001 |
23.79 |
| 2026-08-03 12:00 |
13:55:21.26 |
-09:11:35.8 |
HIP 68001 |
20.02 |
| 2026-08-04 00:00 |
13:55:41.51 |
-09:14:17.8 |
HIP 68001 |
17.29 |
| 2026-08-04 12:00 |
13:56:01.93 |
-09:17:00.3 |
HIP 68001 |
16.18 |
| 2026-08-05 00:00 |
13:56:22.52 |
-09:19:43.4 |
HIP 68024 |
16.28 |
| 2026-08-05 12:00 |
13:56:43.27 |
-09:22:27.1 |
HIP 68024 |
17.61 |
| 2026-08-06 00:00 |
13:57:04.19 |
-09:25:11.4 |
HIP 68024 |
20.59 |
| 2026-08-06 12:00 |
13:57:25.27 |
-09:27:56.2 |
HIP 68024 |
24.65 |
| 2026-08-07 00:00 |
13:57:46.51 |
-09:30:41.6 |
HIP 68241 |
28.27 |
| 2026-08-07 12:00 |
13:58:07.92 |
-09:33:27.5 |
HIP 68371 |
24.10 |
| 2026-08-08 00:00 |
13:58:29.49 |
-09:36:14.0 |
HIP 68371 |
18.37 |
| 2026-08-08 12:00 |
13:58:51.22 |
-09:39:01.1 |
HIP 68371 |
12.86 |
| 2026-08-09 00:00 |
13:59:13.10 |
-09:41:48.7 |
HIP 68371 |
8.10 |
| 2026-08-09 12:00 |
13:59:35.15 |
-09:44:36.8 |
HIP 68371 |
6.30 |
| 2026-08-10 00:00 |
13:59:57.36 |
-09:47:25.4 |
HIP 68371 |
9.43 |
| 2026-08-10 12:00 |
14:00:19.72 |
-09:50:14.5 |
HIP 68371 |
14.65 |
| 2026-08-11 00:00 |
14:00:42.24 |
-09:53:04.2 |
HIP 68518 |
14.21 |
| 2026-08-11 12:00 |
14:01:04.91 |
-09:55:54.3 |
HIP 68518 |
8.24 |
| 2026-08-12 00:00 |
14:01:27.74 |
-09:58:45.0 |
HIP 68518 |
3.50 |
| 2026-08-12 12:00 |
14:01:50.73 |
-10:01:36.1 |
HIP 68518 |
6.03 |
| 2026-08-13 00:00 |
14:02:13.87 |
-10:04:27.7 |
HIP 68518 |
11.89 |
| 2026-08-13 12:00 |
14:02:37.15 |
-10:07:19.7 |
HIP 68518 |
18.14 |
| 2026-08-14 00:00 |
14:03:00.59 |
-10:10:12.2 |
HIP 68518 |
24.51 |
| 2026-08-14 12:00 |
14:03:24.18 |
-10:13:05.2 |
HIP 68689 |
23.38 |
| 2026-08-15 00:00 |
14:03:47.92 |
-10:15:58.6 |
HIP 68689 |
20.42 |
| 2026-08-15 12:00 |
14:04:11.81 |
-10:18:52.4 |
HIP 68689 |
19.31 |
| 2026-08-16 00:00 |
14:04:35.84 |
-10:21:46.7 |
HIP 68689 |
20.38 |
| 2026-08-16 12:00 |
14:05:00.02 |
-10:24:41.4 |
HIP 68689 |
23.36 |
| 2026-08-17 00:00 |
14:05:24.35 |
-10:27:36.5 |
HIP 68689 |
27.66 |
| 2026-08-17 12:00 |
14:05:48.81 |
-10:30:31.9 |
HIP 68993 |
27.04 |
| 2026-08-18 00:00 |
14:06:13.42 |
-10:33:27.8 |
HIP 68993 |
23.31 |
| 2026-08-18 12:00 |
14:06:38.18 |
-10:36:24.1 |
HIP 68993 |
21.10 |
| 2026-08-19 00:00 |
14:07:03.07 |
-10:39:20.7 |
HIP 68993 |
20.93 |