28P/Neujmin 1
メタデータ
| 項目 |
値 |
| Designation |
28P/Neujmin 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-03-11T18:12:43.378560Z |
| Orbit solution date (soln_date, UTC) |
2024-04-16T15:14:57Z |
| Obs used |
1208 |
| NEO |
- |
| M1 |
13.200 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-04-13.0000000 |
| e |
0.77356244 |
| q (au) |
1.580918 |
| a (au) |
6.981694 |
| i (deg) |
14.310272 |
| Ω (om, deg) |
346.344654 |
| ω (w, deg) |
347.467430 |
| M (ma, deg) |
40.724450 |
等級
散乱 + 全体線形
$$
M_a = (13.747 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.747 |
| n |
2.000 |
| gf |
0.893 |
| gb |
-0.726 |
| k |
0.937 |
| 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
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 |
09:23:34.83 |
+23:55:45.2 |
HIP 46119 |
23.27 |
| 2026-02-03 12:00 |
09:23:23.56 |
+23:56:29.9 |
HIP 46062 |
22.74 |
| 2026-02-04 00:00 |
09:23:12.28 |
+23:57:14.2 |
HIP 46062 |
22.43 |
| 2026-02-04 12:00 |
09:23:01.00 |
+23:57:58.3 |
HIP 46062 |
22.44 |
| 2026-02-05 00:00 |
09:22:49.70 |
+23:58:42.1 |
HIP 46062 |
22.78 |
| 2026-02-05 12:00 |
09:22:38.41 |
+23:59:25.7 |
HIP 46062 |
23.42 |
| 2026-02-06 00:00 |
09:22:27.11 |
+24:00:08.9 |
HIP 46062 |
24.34 |
| 2026-02-06 12:00 |
09:22:15.81 |
+24:00:51.8 |
HIP 46062 |
25.52 |
| 2026-02-07 00:00 |
09:22:04.50 |
+24:01:34.5 |
HIP 46062 |
26.92 |
| 2026-02-07 12:00 |
09:21:53.20 |
+24:02:16.8 |
HIP 46062 |
28.50 |
| 2026-02-08 00:00 |
09:21:41.90 |
+24:02:58.8 |
HIP 46062 |
30.24 |
| 2026-02-08 12:00 |
09:21:30.60 |
+24:03:40.5 |
HIP 45756 |
31.40 |
| 2026-02-09 00:00 |
09:21:19.31 |
+24:04:21.9 |
HIP 45756 |
29.07 |
| 2026-02-09 12:00 |
09:21:08.03 |
+24:05:02.9 |
HIP 45756 |
26.81 |
| 2026-02-10 00:00 |
09:20:56.75 |
+24:05:43.6 |
HIP 45756 |
24.63 |
| 2026-02-10 12:00 |
09:20:45.48 |
+24:06:23.9 |
HIP 45756 |
22.56 |
| 2026-02-11 00:00 |
09:20:34.22 |
+24:07:04.0 |
HIP 45756 |
20.63 |
| 2026-02-11 12:00 |
09:20:22.97 |
+24:07:43.6 |
HIP 45756 |
18.88 |
| 2026-02-12 00:00 |
09:20:11.73 |
+24:08:22.9 |
HIP 45756 |
17.37 |
| 2026-02-12 12:00 |
09:20:00.51 |
+24:09:01.9 |
HIP 45756 |
16.17 |
| 2026-02-13 00:00 |
09:19:49.30 |
+24:09:40.5 |
HIP 45756 |
15.33 |
| 2026-02-13 12:00 |
09:19:38.11 |
+24:10:18.7 |
HIP 45728 |
14.42 |
| 2026-02-14 00:00 |
09:19:26.93 |
+24:10:56.5 |
HIP 45728 |
13.29 |
| 2026-02-14 12:00 |
09:19:15.78 |
+24:11:34.0 |
HIP 45728 |
12.62 |
| 2026-02-15 00:00 |
09:19:04.65 |
+24:12:11.1 |
HIP 45728 |
12.48 |
| 2026-02-15 12:00 |
09:18:53.53 |
+24:12:47.8 |
HIP 45728 |
12.88 |
| 2026-02-16 00:00 |
09:18:42.45 |
+24:13:24.1 |
HIP 45728 |
13.78 |
| 2026-02-16 12:00 |
09:18:31.38 |
+24:14:00.0 |
HIP 45728 |
15.07 |
| 2026-02-17 00:00 |
09:18:20.34 |
+24:14:35.4 |
HIP 45728 |
16.67 |
| 2026-02-17 12:00 |
09:18:09.33 |
+24:15:10.5 |
HIP 45728 |
18.49 |
| 2026-02-18 00:00 |
09:17:58.35 |
+24:15:45.2 |
HIP 45728 |
20.47 |
| 2026-02-18 12:00 |
09:17:47.40 |
+24:16:19.5 |
HIP 45728 |
22.56 |
| 2026-02-19 00:00 |
09:17:36.47 |
+24:16:53.3 |
HIP 45728 |
24.74 |
| 2026-02-19 12:00 |
09:17:25.58 |
+24:17:26.8 |
HIP 45728 |
26.97 |
| 2026-02-20 00:00 |
09:17:14.73 |
+24:17:59.7 |
HIP 45728 |
29.26 |
| 2026-02-20 12:00 |
09:17:03.91 |
+24:18:32.3 |
HIP 45728 |
31.57 |
| 2026-02-21 00:00 |
09:16:53.12 |
+24:19:04.4 |
HIP 45728 |
33.90 |
| 2026-02-21 12:00 |
09:16:42.37 |
+24:19:36.1 |
HIP 45728 |
36.25 |
| 2026-02-22 00:00 |
09:16:31.67 |
+24:20:07.4 |
HIP 45423 |
37.38 |
| 2026-02-22 12:00 |
09:16:21.00 |
+24:20:38.2 |
HIP 45423 |
36.90 |
| 2026-02-23 00:00 |
09:16:10.37 |
+24:21:08.6 |
HIP 45268 |
36.00 |
| 2026-02-23 12:00 |
09:15:59.79 |
+24:21:38.5 |
HIP 45268 |
33.66 |
| 2026-02-24 00:00 |
09:15:49.24 |
+24:22:07.9 |
HIP 45268 |
31.34 |