472P/NEAT-LINEAR
メタデータ
| 項目 |
値 |
| Designation |
472P/NEAT-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-07-27T16:54:05.662080Z |
| Orbit solution date (soln_date, UTC) |
2025-11-04T12:43:10Z |
| Obs used |
1351 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
14.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-09-09T02:13:12.604800Z |
| Discovery magnitude (MPC) |
21.70 G |
| Discovery observatory (MPC) |
Z84 · Calar Alto-Schmidt |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-04-22.0000000 |
| e |
0.55921144 |
| q (au) |
3.369057 |
| a (au) |
7.643250 |
| i (deg) |
10.901665 |
| Ω (om, deg) |
207.868441 |
| ω (w, deg) |
218.497895 |
| M (ma, deg) |
253.247850 |
等級
散乱 + 全体線形
$$
M_a = (5.569 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.569 |
| n |
6.000 |
| gf |
0.897 |
| gb |
-0.500 |
| k |
0.955 |
| δ90 |
1.605 |
| 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 |
| 2023-09-05 |
2024-07-25 |
+47.4054 |
-24.439 |
| 2024-08-12 |
2025-04-29 |
-2.4715 |
+1.270 |
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) |
| 2026-02-03 00:00 |
10:04:16.04 |
-00:02:26.4 |
HIP 49280 |
14.49 |
| 2026-02-03 12:00 |
10:04:02.03 |
-00:01:08.3 |
HIP 49280 |
13.22 |
| 2026-02-04 00:00 |
10:03:47.96 |
+00:00:11.0 |
HIP 49280 |
12.96 |
| 2026-02-04 12:00 |
10:03:33.83 |
+00:01:31.3 |
HIP 49280 |
13.77 |
| 2026-02-05 00:00 |
10:03:19.64 |
+00:02:52.6 |
HIP 49280 |
15.51 |
| 2026-02-05 12:00 |
10:03:05.39 |
+00:04:15.1 |
HIP 49280 |
17.93 |
| 2026-02-06 00:00 |
10:02:51.09 |
+00:05:38.6 |
HIP 49280 |
20.79 |
| 2026-02-06 12:00 |
10:02:36.74 |
+00:07:03.1 |
HIP 49280 |
23.94 |
| 2026-02-07 00:00 |
10:02:22.34 |
+00:08:28.7 |
HIP 49280 |
27.30 |
| 2026-02-07 12:00 |
10:02:07.90 |
+00:09:55.3 |
HIP 49280 |
30.80 |
| 2026-02-08 00:00 |
10:01:53.42 |
+00:11:22.8 |
HIP 49280 |
34.40 |
| 2026-02-08 12:00 |
10:01:38.89 |
+00:12:51.4 |
HIP 49280 |
38.07 |
| 2026-02-09 00:00 |
10:01:24.33 |
+00:14:20.9 |
HIP 49058 |
37.38 |
| 2026-02-09 12:00 |
10:01:09.74 |
+00:15:51.4 |
HIP 48927 |
34.62 |
| 2026-02-10 00:00 |
10:00:55.12 |
+00:17:22.8 |
HIP 48927 |
30.78 |
| 2026-02-10 12:00 |
10:00:40.47 |
+00:18:55.1 |
HIP 48927 |
26.97 |
| 2026-02-11 00:00 |
10:00:25.79 |
+00:20:28.4 |
HIP 48927 |
23.21 |
| 2026-02-11 12:00 |
10:00:11.09 |
+00:22:02.5 |
HIP 48927 |
19.52 |
| 2026-02-12 00:00 |
09:59:56.38 |
+00:23:37.5 |
HIP 48927 |
15.99 |
| 2026-02-12 12:00 |
09:59:41.64 |
+00:25:13.4 |
HIP 48927 |
12.73 |
| 2026-02-13 00:00 |
09:59:26.90 |
+00:26:50.1 |
HIP 48927 |
10.05 |
| 2026-02-13 12:00 |
09:59:12.14 |
+00:28:27.6 |
HIP 48927 |
8.51 |
| 2026-02-14 00:00 |
09:58:57.38 |
+00:30:06.0 |
HIP 48927 |
8.75 |
| 2026-02-14 12:00 |
09:58:42.61 |
+00:31:45.1 |
HIP 48927 |
10.66 |
| 2026-02-15 00:00 |
09:58:27.85 |
+00:33:25.0 |
HIP 48927 |
13.56 |
| 2026-02-15 12:00 |
09:58:13.08 |
+00:35:05.7 |
HIP 48927 |
16.94 |
| 2026-02-16 00:00 |
09:57:58.32 |
+00:36:47.1 |
HIP 48927 |
20.58 |
| 2026-02-16 12:00 |
09:57:43.57 |
+00:38:29.2 |
HIP 48927 |
24.35 |
| 2026-02-17 00:00 |
09:57:28.83 |
+00:40:12.0 |
HIP 48927 |
28.22 |
| 2026-02-17 12:00 |
09:57:14.10 |
+00:41:55.5 |
HIP 48927 |
32.13 |
| 2026-02-18 00:00 |
09:56:59.39 |
+00:43:39.6 |
HIP 48681 |
33.57 |
| 2026-02-18 12:00 |
09:56:44.70 |
+00:45:24.4 |
HIP 48681 |
30.11 |
| 2026-02-19 00:00 |
09:56:30.03 |
+00:47:09.8 |
HIP 48681 |
26.82 |
| 2026-02-19 12:00 |
09:56:15.39 |
+00:48:55.9 |
HIP 48681 |
23.76 |
| 2026-02-20 00:00 |
09:56:00.78 |
+00:50:42.5 |
HIP 48681 |
21.03 |
| 2026-02-20 12:00 |
09:55:46.20 |
+00:52:29.6 |
HIP 48591 |
18.42 |
| 2026-02-21 00:00 |
09:55:31.65 |
+00:54:17.4 |
HIP 48591 |
14.51 |
| 2026-02-21 12:00 |
09:55:17.14 |
+00:56:05.6 |
HIP 48591 |
10.70 |
| 2026-02-22 00:00 |
09:55:02.68 |
+00:57:54.3 |
HIP 48591 |
7.18 |
| 2026-02-22 12:00 |
09:54:48.26 |
+00:59:43.6 |
HIP 48591 |
4.62 |
| 2026-02-23 00:00 |
09:54:33.88 |
+01:01:33.2 |
HIP 48591 |
4.89 |
| 2026-02-23 12:00 |
09:54:19.55 |
+01:03:23.4 |
HIP 48591 |
7.68 |
| 2026-02-24 00:00 |
09:54:05.28 |
+01:05:13.9 |
HIP 48591 |
11.24 |