P/2024 FG9 (Nanshan-Hahn)
メタデータ
| 項目 |
値 |
| Designation |
P/2024 FG9 (Nanshan-Hahn) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-20T07:32:21.894720Z |
| Orbit solution date (soln_date, UTC) |
2024-10-26T00:12:24Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
32.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-01-04.0000000 |
| e |
0.50988575 |
| q (au) |
1.596425 |
| a (au) |
3.257251 |
| i (deg) |
1.731019 |
| Ω (om, deg) |
253.044065 |
| ω (w, deg) |
245.894898 |
| M (ma, deg) |
336.978031 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-02-03 00:00 |
19:36:34.72 |
-20:45:39.7 |
HIP 96370 |
13.85 |
| 2026-02-03 12:00 |
19:37:05.87 |
-20:44:22.6 |
HIP 96552 |
10.21 |
| 2026-02-04 00:00 |
19:37:36.95 |
-20:43:05.1 |
HIP 96552 |
6.15 |
| 2026-02-04 12:00 |
19:38:07.96 |
-20:41:47.5 |
HIP 96552 |
8.95 |
| 2026-02-05 00:00 |
19:38:38.90 |
-20:40:29.5 |
HIP 96552 |
15.19 |
| 2026-02-05 12:00 |
19:39:09.77 |
-20:39:11.4 |
HIP 96763 |
15.43 |
| 2026-02-06 00:00 |
19:39:40.56 |
-20:37:53.0 |
HIP 96763 |
8.51 |
| 2026-02-06 12:00 |
19:40:11.29 |
-20:36:34.4 |
HIP 96763 |
3.72 |
| 2026-02-07 00:00 |
19:40:41.94 |
-20:35:15.5 |
HIP 96763 |
7.87 |
| 2026-02-07 12:00 |
19:41:12.52 |
-20:33:56.4 |
HIP 96763 |
14.69 |
| 2026-02-08 00:00 |
19:41:43.02 |
-20:32:37.1 |
HIP 96763 |
21.80 |
| 2026-02-08 12:00 |
19:42:13.44 |
-20:31:17.6 |
HIP 96983 |
21.14 |
| 2026-02-09 00:00 |
19:42:43.79 |
-20:29:57.9 |
HIP 96983 |
18.24 |
| 2026-02-09 12:00 |
19:43:14.07 |
-20:28:38.0 |
HIP 96983 |
17.97 |
| 2026-02-10 00:00 |
19:43:44.26 |
-20:27:17.8 |
HIP 96983 |
20.42 |
| 2026-02-10 12:00 |
19:44:14.38 |
-20:25:57.5 |
HIP 97130 |
21.52 |
| 2026-02-11 00:00 |
19:44:44.41 |
-20:24:37.0 |
HIP 97130 |
23.01 |
| 2026-02-11 12:00 |
19:45:14.37 |
-20:23:16.3 |
HIP 97130 |
26.43 |
| 2026-02-12 00:00 |
19:45:44.25 |
-20:21:55.4 |
HIP 97130 |
31.12 |
| 2026-02-12 12:00 |
19:46:14.04 |
-20:20:34.3 |
HIP 97348 |
30.37 |
| 2026-02-13 00:00 |
19:46:43.75 |
-20:19:13.1 |
HIP 97348 |
26.93 |
| 2026-02-13 12:00 |
19:47:13.38 |
-20:17:51.7 |
HIP 97348 |
25.07 |
| 2026-02-14 00:00 |
19:47:42.92 |
-20:16:30.1 |
HIP 97348 |
25.14 |
| 2026-02-14 12:00 |
19:48:12.38 |
-20:15:08.4 |
HIP 97348 |
27.11 |
| 2026-02-15 00:00 |
19:48:41.75 |
-20:13:46.5 |
HIP 97348 |
30.59 |
| 2026-02-15 12:00 |
19:49:11.04 |
-20:12:24.5 |
HIP 97522 |
31.09 |
| 2026-02-16 00:00 |
19:49:40.24 |
-20:11:02.3 |
HIP 97522 |
32.97 |
| 2026-02-16 12:00 |
19:50:09.35 |
-20:09:40.0 |
HIP 97559 |
35.55 |
| 2026-02-17 00:00 |
19:50:38.37 |
-20:08:17.6 |
HIP 97559 |
38.55 |
| 2026-02-17 12:00 |
19:51:07.30 |
-20:06:55.0 |
HIP 97899 |
39.65 |
| 2026-02-18 00:00 |
19:51:36.14 |
-20:05:32.4 |
HIP 97899 |
34.14 |
| 2026-02-18 12:00 |
19:52:04.88 |
-20:04:09.6 |
HIP 97899 |
29.25 |
| 2026-02-19 00:00 |
19:52:33.54 |
-20:02:46.7 |
HIP 97899 |
25.32 |
| 2026-02-19 12:00 |
19:53:02.10 |
-20:01:23.7 |
HIP 97899 |
22.82 |
| 2026-02-20 00:00 |
19:53:30.56 |
-20:00:00.6 |
HIP 97899 |
22.24 |
| 2026-02-20 12:00 |
19:53:58.93 |
-19:58:37.4 |
HIP 97899 |
23.69 |
| 2026-02-21 00:00 |
19:54:27.21 |
-19:57:14.1 |
HIP 97899 |
26.84 |
| 2026-02-21 12:00 |
19:54:55.39 |
-19:55:50.7 |
HIP 97937 |
27.75 |
| 2026-02-22 00:00 |
19:55:23.47 |
-19:54:27.3 |
HIP 97937 |
29.49 |
| 2026-02-22 12:00 |
19:55:51.45 |
-19:53:03.8 |
HIP 97937 |
32.55 |
| 2026-02-23 00:00 |
19:56:19.33 |
-19:51:40.2 |
HIP 98329 |
33.34 |
| 2026-02-23 12:00 |
19:56:47.11 |
-19:50:16.6 |
HIP 98329 |
27.15 |
| 2026-02-24 00:00 |
19:57:14.80 |
-19:48:52.9 |
HIP 98329 |
21.27 |