243P/NEAT
メタデータ
| 項目 |
値 |
| Designation |
243P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-03-02T17:39:46.814400Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T12:12:41Z |
| Obs used |
819 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
18.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-02-12.0000000 |
| e |
0.35918009 |
| q (au) |
2.455243 |
| a (au) |
3.831408 |
| i (deg) |
7.639424 |
| Ω (om, deg) |
87.672514 |
| ω (w, deg) |
283.782339 |
| M (ma, deg) |
45.506543 |
等級
散乱 + 全体線形
$$
M_a = (11.191 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.191 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.819 |
| k |
0.998 |
| 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) |
| 2026-02-03 00:00 |
23:34:46.32 |
-09:07:23.1 |
HIP 116226 |
27.31 |
| 2026-02-03 12:00 |
23:35:38.39 |
-09:01:14.0 |
HIP 116470 |
16.20 |
| 2026-02-04 00:00 |
23:36:30.50 |
-08:55:04.5 |
HIP 116470 |
11.78 |
| 2026-02-04 12:00 |
23:37:22.64 |
-08:48:54.6 |
HIP 116639 |
16.67 |
| 2026-02-05 00:00 |
23:38:14.82 |
-08:42:44.4 |
HIP 116639 |
5.12 |
| 2026-02-05 12:00 |
23:39:07.04 |
-08:36:33.8 |
HIP 116639 |
13.55 |
| 2026-02-06 00:00 |
23:39:59.29 |
-08:30:22.8 |
HIP 116639 |
27.41 |
| 2026-02-06 12:00 |
23:40:51.57 |
-08:24:11.5 |
HIP 116891 |
27.58 |
| 2026-02-07 00:00 |
23:41:43.89 |
-08:17:59.8 |
HIP 116834 |
26.88 |
| 2026-02-07 12:00 |
23:42:36.24 |
-08:11:47.8 |
HIP 117076 |
21.66 |
| 2026-02-08 00:00 |
23:43:28.63 |
-08:05:35.4 |
HIP 117041 |
10.32 |
| 2026-02-08 12:00 |
23:44:21.05 |
-07:59:22.8 |
HIP 117041 |
12.19 |
| 2026-02-09 00:00 |
23:45:13.51 |
-07:53:09.8 |
HIP 117041 |
24.60 |
| 2026-02-09 12:00 |
23:46:05.99 |
-07:46:56.5 |
HIP 117317 |
25.58 |
| 2026-02-10 00:00 |
23:46:58.51 |
-07:40:42.9 |
HIP 117317 |
24.97 |
| 2026-02-10 12:00 |
23:47:51.06 |
-07:34:29.0 |
HIP 117446 |
17.41 |
| 2026-02-11 00:00 |
23:48:43.65 |
-07:28:14.8 |
HIP 117446 |
3.75 |
| 2026-02-11 12:00 |
23:49:36.27 |
-07:22:00.4 |
HIP 117446 |
11.95 |
| 2026-02-12 00:00 |
23:50:28.91 |
-07:15:45.7 |
HIP 117446 |
26.28 |
| 2026-02-12 12:00 |
23:51:21.59 |
-07:09:30.7 |
HIP 117666 |
33.32 |
| 2026-02-13 00:00 |
23:52:14.30 |
-07:03:15.5 |
HIP 117666 |
27.34 |
| 2026-02-13 12:00 |
23:53:07.05 |
-06:57:00.0 |
HIP 117777 |
18.01 |
| 2026-02-14 00:00 |
23:53:59.82 |
-06:50:44.3 |
HIP 117777 |
17.60 |
| 2026-02-14 12:00 |
23:54:52.62 |
-06:44:28.4 |
HIP 117777 |
26.78 |
| 2026-02-15 00:00 |
23:55:45.45 |
-06:38:12.2 |
HIP 117966 |
29.74 |
| 2026-02-15 12:00 |
23:56:38.31 |
-06:31:55.9 |
HIP 118070 |
17.64 |
| 2026-02-16 00:00 |
23:57:31.20 |
-06:25:39.4 |
HIP 118070 |
12.34 |
| 2026-02-16 12:00 |
23:58:24.12 |
-06:19:22.6 |
HIP 118070 |
20.45 |
| 2026-02-17 00:00 |
23:59:17.07 |
-06:13:05.7 |
HIP 118298 |
20.38 |
| 2026-02-17 12:00 |
00:00:10.04 |
-06:06:48.6 |
HIP 118298 |
15.12 |
| 2026-02-18 00:00 |
00:01:03.05 |
-06:00:31.4 |
HIP 91 |
8.13 |
| 2026-02-18 12:00 |
00:01:56.08 |
-05:54:14.0 |
HIP 154 |
6.62 |
| 2026-02-19 00:00 |
00:02:49.13 |
-05:47:56.5 |
HIP 187 |
16.77 |
| 2026-02-19 12:00 |
00:03:42.22 |
-05:41:38.9 |
HIP 443 |
24.38 |
| 2026-02-20 00:00 |
00:04:35.32 |
-05:35:21.1 |
HIP 443 |
13.23 |
| 2026-02-20 12:00 |
00:05:28.46 |
-05:29:03.2 |
HIP 443 |
13.58 |
| 2026-02-21 00:00 |
00:06:21.62 |
-05:22:45.2 |
HIP 637 |
22.39 |
| 2026-02-21 12:00 |
00:07:14.80 |
-05:16:27.2 |
HIP 637 |
15.13 |
| 2026-02-22 00:00 |
00:08:08.01 |
-05:10:09.0 |
HIP 642 |
19.22 |
| 2026-02-22 12:00 |
00:09:01.24 |
-05:03:50.8 |
HIP 642 |
21.11 |
| 2026-02-23 00:00 |
00:09:54.50 |
-04:57:32.5 |
HIP 840 |
18.40 |
| 2026-02-23 12:00 |
00:10:47.78 |
-04:51:14.2 |
HIP 936 |
17.54 |
| 2026-02-24 00:00 |
00:11:41.08 |
-04:44:55.8 |
HIP 936 |
19.21 |