メタデータ
| 項目 |
値 |
| Designation |
473P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2001-11-04T17:20:30.220800Z |
| Orbit solution date (soln_date, UTC) |
2024-06-30T00:42:21Z |
| Obs used |
520 |
| NEO |
- |
| M1 |
11.200 |
| K1 |
25.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-08-01.0000000 |
| e |
0.82249544 |
| q (au) |
1.407115 |
| a (au) |
7.927206 |
| i (deg) |
56.948538 |
| Ω (om, deg) |
22.184978 |
| ω (w, deg) |
43.106501 |
| M (ma, deg) |
108.688703 |
等級
散乱 + 全体線形
$$
M_a = (14.080 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.080 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-11-29 |
2024-05-08 |
+16.9214 |
-4.614 |
| 2024-05-08 |
2024-06-25 |
-14.5858 |
+3.980 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
13:16:24.22 |
-14:01:09.7 |
HIP 64878 |
22.57 |
| 2026-09-20 12:00 |
13:16:36.95 |
-14:02:55.3 |
HIP 64878 |
19.31 |
| 2026-09-21 00:00 |
13:16:49.71 |
-14:04:41.2 |
HIP 64878 |
16.17 |
| 2026-09-21 12:00 |
13:17:02.50 |
-14:06:27.2 |
HIP 64878 |
13.23 |
| 2026-09-22 00:00 |
13:17:15.32 |
-14:08:13.5 |
HIP 64878 |
10.69 |
| 2026-09-22 12:00 |
13:17:28.16 |
-14:10:00.0 |
HIP 64878 |
8.89 |
| 2026-09-23 00:00 |
13:17:41.03 |
-14:11:46.7 |
HIP 64878 |
8.34 |
| 2026-09-23 12:00 |
13:17:53.93 |
-14:13:33.6 |
HIP 64878 |
9.27 |
| 2026-09-24 00:00 |
13:18:06.85 |
-14:15:20.8 |
HIP 64878 |
11.33 |
| 2026-09-24 12:00 |
13:18:19.80 |
-14:17:08.2 |
HIP 64878 |
14.03 |
| 2026-09-25 00:00 |
13:18:32.77 |
-14:18:55.7 |
HIP 64905 |
16.63 |
| 2026-09-25 12:00 |
13:18:45.77 |
-14:20:43.5 |
HIP 64905 |
16.17 |
| 2026-09-26 00:00 |
13:18:58.79 |
-14:22:31.5 |
HIP 64905 |
16.51 |
| 2026-09-26 12:00 |
13:19:11.83 |
-14:24:19.7 |
HIP 64905 |
17.61 |
| 2026-09-27 00:00 |
13:19:24.89 |
-14:26:08.0 |
HIP 64905 |
19.34 |
| 2026-09-27 12:00 |
13:19:37.98 |
-14:27:56.6 |
HIP 64905 |
21.56 |
| 2026-09-28 00:00 |
13:19:51.08 |
-14:29:45.4 |
HIP 65116 |
20.28 |
| 2026-09-28 12:00 |
13:20:04.21 |
-14:31:34.3 |
HIP 65116 |
17.03 |
| 2026-09-29 00:00 |
13:20:17.36 |
-14:33:23.5 |
HIP 65116 |
14.00 |
| 2026-09-29 12:00 |
13:20:30.52 |
-14:35:12.8 |
HIP 65116 |
11.33 |
| 2026-09-30 00:00 |
13:20:43.71 |
-14:37:02.3 |
HIP 65116 |
9.37 |
| 2026-09-30 12:00 |
13:20:56.91 |
-14:38:52.0 |
HIP 65116 |
8.60 |
| 2026-10-01 00:00 |
13:21:10.14 |
-14:40:41.9 |
HIP 65116 |
9.35 |
| 2026-10-01 12:00 |
13:21:23.37 |
-14:42:31.9 |
HIP 65116 |
11.32 |
| 2026-10-02 00:00 |
13:21:36.63 |
-14:44:22.1 |
HIP 65116 |
14.00 |
| 2026-10-02 12:00 |
13:21:49.90 |
-14:46:12.5 |
HIP 65116 |
17.07 |
| 2026-10-03 00:00 |
13:22:03.19 |
-14:48:03.0 |
HIP 65319 |
19.03 |
| 2026-10-03 12:00 |
13:22:16.49 |
-14:49:53.7 |
HIP 65319 |
15.35 |
| 2026-10-04 00:00 |
13:22:29.81 |
-14:51:44.6 |
HIP 65319 |
11.69 |
| 2026-10-04 12:00 |
13:22:43.14 |
-14:53:35.6 |
HIP 65319 |
8.07 |
| 2026-10-05 00:00 |
13:22:56.48 |
-14:55:26.8 |
HIP 65319 |
4.59 |
| 2026-10-05 12:00 |
13:23:09.83 |
-14:57:18.1 |
HIP 65319 |
2.18 |
| 2026-10-06 00:00 |
13:23:23.20 |
-14:59:09.6 |
HIP 65319 |
4.01 |
| 2026-10-06 12:00 |
13:23:36.58 |
-15:01:01.2 |
HIP 65356 |
6.15 |
| 2026-10-07 00:00 |
13:23:49.97 |
-15:02:53.0 |
HIP 65356 |
4.69 |
| 2026-10-07 12:00 |
13:24:03.37 |
-15:04:44.9 |
HIP 65356 |
5.84 |
| 2026-10-08 00:00 |
13:24:16.78 |
-15:06:37.0 |
HIP 65356 |
8.60 |
| 2026-10-08 12:00 |
13:24:30.19 |
-15:08:29.1 |
HIP 65356 |
11.91 |
| 2026-10-09 00:00 |
13:24:43.62 |
-15:10:21.5 |
HIP 65356 |
15.42 |
| 2026-10-09 12:00 |
13:24:57.05 |
-15:12:13.9 |
HIP 65356 |
19.02 |
| 2026-10-10 00:00 |
13:25:10.49 |
-15:14:06.4 |
HIP 65356 |
22.67 |
| 2026-10-10 12:00 |
13:25:23.93 |
-15:15:59.1 |
HIP 65463 |
22.49 |
| 2026-10-11 00:00 |
13:25:37.38 |
-15:17:51.9 |
HIP 65463 |
21.65 |