メタデータ
| 項目 |
値 |
| Designation |
353P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-12-22T00:55:05.024640Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:56Z |
| Obs used |
126 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
12.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-12-12.0000000 |
| e |
0.46877362 |
| q (au) |
2.212902 |
| a (au) |
4.165647 |
| i (deg) |
28.415165 |
| Ω (om, deg) |
121.588906 |
| ω (w, deg) |
230.495742 |
| M (ma, deg) |
189.468601 |
等級
散乱 + 全体線形
$$
M_a = (16.866 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.866 |
| n |
2.000 |
| gf |
0.975 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
9.948 |
| 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) |
| 2026-05-12 00:00 |
23:57:15.67 |
-14:08:42.4 |
HIP 118205 |
19.12 |
| 2026-05-12 12:00 |
23:58:18.87 |
-14:07:24.3 |
HIP 118205 |
3.77 |
| 2026-05-13 00:00 |
23:59:22.05 |
-14:06:07.3 |
HIP 118205 |
11.64 |
| 2026-05-13 12:00 |
00:00:25.22 |
-14:04:51.4 |
HIP 35 |
24.57 |
| 2026-05-14 00:00 |
00:01:28.37 |
-14:03:36.4 |
HIP 35 |
30.09 |
| 2026-05-14 12:00 |
00:02:31.49 |
-14:02:22.6 |
HIP 179 |
38.10 |
| 2026-05-15 00:00 |
00:03:34.60 |
-14:01:09.9 |
HIP 454 |
36.30 |
| 2026-05-15 12:00 |
00:04:37.69 |
-13:59:58.3 |
HIP 454 |
27.97 |
| 2026-05-16 00:00 |
00:05:40.75 |
-13:58:47.8 |
HIP 554 |
21.11 |
| 2026-05-16 12:00 |
00:06:43.79 |
-13:57:38.4 |
HIP 554 |
12.73 |
| 2026-05-17 00:00 |
00:07:46.81 |
-13:56:30.2 |
HIP 645 |
17.36 |
| 2026-05-17 12:00 |
00:08:49.81 |
-13:55:23.2 |
HIP 645 |
21.97 |
| 2026-05-18 00:00 |
00:09:52.78 |
-13:54:17.3 |
HIP 846 |
8.73 |
| 2026-05-18 12:00 |
00:10:55.72 |
-13:53:12.7 |
HIP 887 |
1.10 |
| 2026-05-19 00:00 |
00:11:58.64 |
-13:52:09.3 |
HIP 973 |
3.53 |
| 2026-05-19 12:00 |
00:13:01.54 |
-13:51:07.1 |
HIP 973 |
14.39 |
| 2026-05-20 00:00 |
00:14:04.40 |
-13:50:06.2 |
HIP 1185 |
23.14 |
| 2026-05-20 12:00 |
00:15:07.24 |
-13:49:06.5 |
HIP 1285 |
19.83 |
| 2026-05-21 00:00 |
00:16:10.04 |
-13:48:08.1 |
HIP 1285 |
15.14 |
| 2026-05-21 12:00 |
00:17:12.82 |
-13:47:10.9 |
HIP 1378 |
19.37 |
| 2026-05-22 00:00 |
00:18:15.57 |
-13:46:15.1 |
HIP 1444 |
19.36 |
| 2026-05-22 12:00 |
00:19:18.29 |
-13:45:20.6 |
HIP 1658 |
22.78 |
| 2026-05-23 00:00 |
00:20:20.98 |
-13:44:27.4 |
HIP 1658 |
9.10 |
| 2026-05-23 12:00 |
00:21:23.63 |
-13:43:35.5 |
HIP 1658 |
10.59 |
| 2026-05-24 00:00 |
00:22:26.26 |
-13:42:45.0 |
HIP 1752 |
15.20 |
| 2026-05-24 12:00 |
00:23:28.85 |
-13:41:55.8 |
HIP 1752 |
23.30 |
| 2026-05-25 00:00 |
00:24:31.41 |
-13:41:08.1 |
HIP 1865 |
27.44 |
| 2026-05-25 12:00 |
00:25:33.94 |
-13:40:21.7 |
HIP 2043 |
25.59 |
| 2026-05-26 00:00 |
00:26:36.43 |
-13:39:36.7 |
HIP 2099 |
22.18 |
| 2026-05-26 12:00 |
00:27:38.88 |
-13:38:53.1 |
HIP 2291 |
24.15 |
| 2026-05-27 00:00 |
00:28:41.31 |
-13:38:10.9 |
HIP 2291 |
9.56 |
| 2026-05-27 12:00 |
00:29:43.69 |
-13:37:30.2 |
HIP 2291 |
7.80 |
| 2026-05-28 00:00 |
00:30:46.04 |
-13:36:50.9 |
HIP 2399 |
6.66 |
| 2026-05-28 12:00 |
00:31:48.36 |
-13:36:13.1 |
HIP 2579 |
15.24 |
| 2026-05-29 00:00 |
00:32:50.63 |
-13:35:36.8 |
HIP 2579 |
6.58 |
| 2026-05-29 12:00 |
00:33:52.87 |
-13:35:02.0 |
HIP 2579 |
17.70 |
| 2026-05-30 00:00 |
00:34:55.07 |
-13:34:28.6 |
HIP 2776 |
21.93 |
| 2026-05-30 12:00 |
00:35:57.22 |
-13:33:56.8 |
HIP 2776 |
22.43 |
| 2026-05-31 00:00 |
00:36:59.34 |
-13:33:26.6 |
HIP 2776 |
31.30 |
| 2026-05-31 12:00 |
00:38:01.42 |
-13:32:57.9 |
HIP 3151 |
35.92 |
| 2026-06-01 00:00 |
00:39:03.45 |
-13:32:30.7 |
HIP 3151 |
25.28 |
| 2026-06-01 12:00 |
00:40:05.44 |
-13:32:05.2 |
HIP 3151 |
21.00 |
| 2026-06-02 00:00 |
00:41:07.39 |
-13:31:41.2 |
HIP 3249 |
21.74 |