メタデータ
| 項目 |
値 |
| Designation |
368P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-09-09T00:50:13.459200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:37Z |
| Obs used |
784 |
| NEO |
- |
| M1 |
14.600 |
| K1 |
8.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-06-13T04:32:59.712000Z |
| Discovery magnitude (MPC) |
19.40 N |
| Discovery observatory (MPC) |
J04 · ESA Optical Ground Station, Tenerife |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-06-05.0000000 |
| e |
0.62854670 |
| q (au) |
2.044313 |
| a (au) |
5.503554 |
| i (deg) |
15.447948 |
| Ω (om, deg) |
258.165998 |
| ω (w, deg) |
118.808346 |
| M (ma, deg) |
185.412933 |
等級
散乱 + 全体線形
$$
M_a = (16.296 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.296 |
| n |
2.000 |
| gf |
0.850 |
| gb |
-0.721 |
| k |
0.940 |
| δ90 |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
13:24:23.56 |
-20:10:13.7 |
HIP 65504 |
16.10 |
| 2026-09-20 12:00 |
13:24:37.40 |
-20:11:07.7 |
HIP 65504 |
12.86 |
| 2026-09-21 00:00 |
13:24:51.27 |
-20:12:02.0 |
HIP 65504 |
9.68 |
| 2026-09-21 12:00 |
13:25:05.18 |
-20:12:56.8 |
HIP 65504 |
6.71 |
| 2026-09-22 00:00 |
13:25:19.13 |
-20:13:52.0 |
HIP 65504 |
4.39 |
| 2026-09-22 12:00 |
13:25:33.11 |
-20:14:47.6 |
HIP 65504 |
4.09 |
| 2026-09-23 00:00 |
13:25:47.13 |
-20:15:43.6 |
HIP 65504 |
6.12 |
| 2026-09-23 12:00 |
13:26:01.18 |
-20:16:40.1 |
HIP 65504 |
9.05 |
| 2026-09-24 00:00 |
13:26:15.27 |
-20:17:36.9 |
HIP 65504 |
12.24 |
| 2026-09-24 12:00 |
13:26:29.40 |
-20:18:34.1 |
HIP 65504 |
15.55 |
| 2026-09-25 00:00 |
13:26:43.55 |
-20:19:31.7 |
HIP 65504 |
18.92 |
| 2026-09-25 12:00 |
13:26:57.74 |
-20:20:29.7 |
HIP 65504 |
22.33 |
| 2026-09-26 00:00 |
13:27:11.97 |
-20:21:28.1 |
HIP 65504 |
25.76 |
| 2026-09-26 12:00 |
13:27:26.22 |
-20:22:26.9 |
HIP 65504 |
29.21 |
| 2026-09-27 00:00 |
13:27:40.51 |
-20:23:26.1 |
HIP 65504 |
32.68 |
| 2026-09-27 12:00 |
13:27:54.83 |
-20:24:25.7 |
HIP 65866 |
30.04 |
| 2026-09-28 00:00 |
13:28:09.17 |
-20:25:25.6 |
HIP 65866 |
26.98 |
| 2026-09-28 12:00 |
13:28:23.55 |
-20:26:25.9 |
HIP 65866 |
24.03 |
| 2026-09-29 00:00 |
13:28:37.96 |
-20:27:26.6 |
HIP 65866 |
21.25 |
| 2026-09-29 12:00 |
13:28:52.40 |
-20:28:27.6 |
HIP 65866 |
18.72 |
| 2026-09-30 00:00 |
13:29:06.87 |
-20:29:29.0 |
HIP 65866 |
16.56 |
| 2026-09-30 12:00 |
13:29:21.36 |
-20:30:30.8 |
HIP 65866 |
14.95 |
| 2026-10-01 00:00 |
13:29:35.89 |
-20:31:33.0 |
HIP 65866 |
14.06 |
| 2026-10-01 12:00 |
13:29:50.44 |
-20:32:35.5 |
HIP 65866 |
14.05 |
| 2026-10-02 00:00 |
13:30:05.01 |
-20:33:38.3 |
HIP 65866 |
14.93 |
| 2026-10-02 12:00 |
13:30:19.62 |
-20:34:41.5 |
HIP 65866 |
16.55 |
| 2026-10-03 00:00 |
13:30:34.25 |
-20:35:45.1 |
HIP 65866 |
18.73 |
| 2026-10-03 12:00 |
13:30:48.90 |
-20:36:49.0 |
HIP 65866 |
21.31 |
| 2026-10-04 00:00 |
13:31:03.58 |
-20:37:53.2 |
HIP 66016 |
23.72 |
| 2026-10-04 12:00 |
13:31:18.29 |
-20:38:57.8 |
HIP 66016 |
20.93 |
| 2026-10-05 00:00 |
13:31:33.01 |
-20:40:02.7 |
HIP 66016 |
18.43 |
| 2026-10-05 12:00 |
13:31:47.77 |
-20:41:07.9 |
HIP 66016 |
16.33 |
| 2026-10-06 00:00 |
13:32:02.54 |
-20:42:13.5 |
HIP 66016 |
14.83 |
| 2026-10-06 12:00 |
13:32:17.34 |
-20:43:19.4 |
HIP 66016 |
14.11 |
| 2026-10-07 00:00 |
13:32:32.15 |
-20:44:25.6 |
HIP 66016 |
14.31 |
| 2026-10-07 12:00 |
13:32:46.99 |
-20:45:32.2 |
HIP 66016 |
15.38 |
| 2026-10-08 00:00 |
13:33:01.85 |
-20:46:39.0 |
HIP 66016 |
17.17 |
| 2026-10-08 12:00 |
13:33:16.73 |
-20:47:46.2 |
HIP 66016 |
19.49 |
| 2026-10-09 00:00 |
13:33:31.63 |
-20:48:53.7 |
HIP 66016 |
22.17 |
| 2026-10-09 12:00 |
13:33:46.54 |
-20:50:01.5 |
HIP 66016 |
25.11 |
| 2026-10-10 00:00 |
13:34:01.48 |
-20:51:09.6 |
HIP 66016 |
28.21 |
| 2026-10-10 12:00 |
13:34:16.43 |
-20:52:17.9 |
HIP 66016 |
31.44 |
| 2026-10-11 00:00 |
13:34:31.40 |
-20:53:26.6 |
HIP 66016 |
34.76 |