メタデータ
| 項目 |
値 |
| Designation |
163P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-02-01T08:29:40.407360Z |
| Orbit solution date (soln_date, UTC) |
2021-09-22T15:34:14Z |
| Obs used |
355 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
19.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-11-20.0000000 |
| e |
0.47602079 |
| q (au) |
1.928340 |
| a (au) |
3.680184 |
| i (deg) |
12.504636 |
| Ω (om, deg) |
103.347360 |
| ω (w, deg) |
348.053059 |
| M (ma, deg) |
91.670806 |
等級
散乱 + 全体線形
$$
M_a = (19.805 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.805 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.678 |
| k |
0.800 |
| δ90 |
9.999 |
| 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 |
02:47:08.19 |
+06:36:35.7 |
HIP 13037 |
7.84 |
| 2026-06-01 12:00 |
02:48:03.18 |
+06:40:58.1 |
HIP 13037 |
7.75 |
| 2026-06-02 00:00 |
02:48:58.23 |
+06:45:19.6 |
HIP 13037 |
21.69 |
| 2026-06-02 12:00 |
02:49:53.33 |
+06:49:40.5 |
HIP 13198 |
21.63 |
| 2026-06-03 00:00 |
02:50:48.49 |
+06:54:00.5 |
HIP 13198 |
29.53 |
| 2026-06-03 12:00 |
02:51:43.71 |
+06:58:19.7 |
HIP 13449 |
21.87 |
| 2026-06-04 00:00 |
02:52:38.98 |
+07:02:38.1 |
HIP 13449 |
9.88 |
| 2026-06-04 12:00 |
02:53:34.31 |
+07:06:55.7 |
HIP 13449 |
11.42 |
| 2026-06-05 00:00 |
02:54:29.69 |
+07:11:12.5 |
HIP 13650 |
19.56 |
| 2026-06-05 12:00 |
02:55:25.14 |
+07:15:28.4 |
HIP 13650 |
5.16 |
| 2026-06-06 00:00 |
02:56:20.63 |
+07:19:43.5 |
HIP 13650 |
9.24 |
| 2026-06-06 12:00 |
02:57:16.18 |
+07:23:57.8 |
HIP 13757 |
15.48 |
| 2026-06-07 00:00 |
02:58:11.79 |
+07:28:11.3 |
HIP 13757 |
19.83 |
| 2026-06-07 12:00 |
02:59:07.45 |
+07:32:23.8 |
HIP 13967 |
10.81 |
| 2026-06-08 00:00 |
03:00:03.17 |
+07:36:35.6 |
HIP 13967 |
5.84 |
| 2026-06-08 12:00 |
03:00:58.95 |
+07:40:46.5 |
HIP 13976 |
14.57 |
| 2026-06-09 00:00 |
03:01:54.77 |
+07:44:56.5 |
HIP 14126 |
7.52 |
| 2026-06-09 12:00 |
03:02:50.65 |
+07:49:05.6 |
HIP 14126 |
10.16 |
| 2026-06-10 00:00 |
03:03:46.59 |
+07:53:13.8 |
HIP 14334 |
20.80 |
| 2026-06-10 12:00 |
03:04:42.58 |
+07:57:21.2 |
HIP 14334 |
9.65 |
| 2026-06-11 00:00 |
03:05:38.62 |
+08:01:27.7 |
HIP 14334 |
13.12 |
| 2026-06-11 12:00 |
03:06:34.72 |
+08:05:33.2 |
HIP 14504 |
21.29 |
| 2026-06-12 00:00 |
03:07:30.87 |
+08:09:37.9 |
HIP 14504 |
14.39 |
| 2026-06-12 12:00 |
03:08:27.07 |
+08:13:41.6 |
HIP 14607 |
14.85 |
| 2026-06-13 00:00 |
03:09:23.32 |
+08:17:44.4 |
HIP 14607 |
15.23 |
| 2026-06-13 12:00 |
03:10:19.63 |
+08:21:46.3 |
HIP 14842 |
25.10 |
| 2026-06-14 00:00 |
03:11:15.98 |
+08:25:47.3 |
HIP 14842 |
19.74 |
| 2026-06-14 12:00 |
03:12:12.39 |
+08:29:47.3 |
HIP 14842 |
23.88 |
| 2026-06-15 00:00 |
03:13:08.84 |
+08:33:46.3 |
HIP 14842 |
34.22 |
| 2026-06-15 12:00 |
03:14:05.35 |
+08:37:44.4 |
HIP 15099 |
23.53 |
| 2026-06-16 00:00 |
03:15:01.90 |
+08:41:41.6 |
HIP 15099 |
17.60 |
| 2026-06-16 12:00 |
03:15:58.51 |
+08:45:37.7 |
HIP 15099 |
22.10 |
| 2026-06-17 00:00 |
03:16:55.16 |
+08:49:33.0 |
HIP 15298 |
18.10 |
| 2026-06-17 12:00 |
03:17:51.86 |
+08:53:27.2 |
HIP 15298 |
14.82 |
| 2026-06-18 00:00 |
03:18:48.60 |
+08:57:20.4 |
HIP 15374 |
19.24 |
| 2026-06-18 12:00 |
03:19:45.40 |
+09:01:12.7 |
HIP 15572 |
12.73 |
| 2026-06-19 00:00 |
03:20:42.24 |
+09:05:04.0 |
HIP 15572 |
3.32 |
| 2026-06-19 12:00 |
03:21:39.12 |
+09:08:54.2 |
HIP 15572 |
16.85 |
| 2026-06-20 00:00 |
03:22:36.05 |
+09:12:43.5 |
HIP 15810 |
27.36 |
| 2026-06-20 12:00 |
03:23:33.03 |
+09:16:31.8 |
HIP 15900 |
23.85 |
| 2026-06-21 00:00 |
03:24:30.06 |
+09:20:19.1 |
HIP 15900 |
19.14 |
| 2026-06-21 12:00 |
03:25:27.13 |
+09:24:05.4 |
HIP 15936 |
17.73 |
| 2026-06-22 00:00 |
03:26:24.24 |
+09:27:50.6 |
HIP 16096 |
18.76 |