メタデータ
| 項目 |
値 |
| Designation |
C/2024 X1 (Fazekas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-08-03T09:53:36.170880Z |
| Orbit solution date (soln_date, UTC) |
2026-08-07T12:42:14Z |
| Obs used |
179 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-12-11T05:13:51.398400Z |
| Discovery magnitude (MPC) |
19.36 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-07-27.0000000 |
| e |
0.59634191 |
| q (au) |
3.816727 |
| a (au) |
9.455347 |
| i (deg) |
6.465195 |
| Ω (om, deg) |
351.982233 |
| ω (w, deg) |
124.361784 |
| M (ma, deg) |
359.748732 |
等級
散乱 + 全体線形
$$
M_a = (12.815 + 2.661\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.815 |
| n |
2.661 |
| gf |
0.801 |
| gb |
-0.975 |
| k |
1.000 |
| δ90 |
1.001 |
| 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) |
| 2026-09-20 00:00 |
11:45:05.99 |
+01:12:02.4 |
HIP 57317 |
17.47 |
| 2026-09-20 12:00 |
11:45:34.48 |
+01:08:37.4 |
HIP 57317 |
15.62 |
| 2026-09-21 00:00 |
11:46:02.95 |
+01:05:12.4 |
HIP 57317 |
17.53 |
| 2026-09-21 12:00 |
11:46:31.40 |
+01:01:47.6 |
HIP 57317 |
22.25 |
| 2026-09-22 00:00 |
11:46:59.82 |
+00:58:22.8 |
HIP 57548 |
14.86 |
| 2026-09-22 12:00 |
11:47:28.23 |
+00:54:58.2 |
HIP 57548 |
7.62 |
| 2026-09-23 00:00 |
11:47:56.61 |
+00:51:33.6 |
HIP 57548 |
4.42 |
| 2026-09-23 12:00 |
11:48:24.97 |
+00:48:09.2 |
HIP 57548 |
10.24 |
| 2026-09-24 00:00 |
11:48:53.31 |
+00:44:44.9 |
HIP 57658 |
11.96 |
| 2026-09-24 12:00 |
11:49:21.62 |
+00:41:20.8 |
HIP 57658 |
5.06 |
| 2026-09-25 00:00 |
11:49:49.91 |
+00:37:56.7 |
HIP 57658 |
5.62 |
| 2026-09-25 12:00 |
11:50:18.18 |
+00:34:32.8 |
HIP 57658 |
12.67 |
| 2026-09-26 00:00 |
11:50:46.42 |
+00:31:09.0 |
HIP 57658 |
20.30 |
| 2026-09-26 12:00 |
11:51:14.64 |
+00:27:45.4 |
HIP 57878 |
19.94 |
| 2026-09-27 00:00 |
11:51:42.83 |
+00:24:21.9 |
HIP 57878 |
12.53 |
| 2026-09-27 12:00 |
11:52:11.00 |
+00:20:58.5 |
HIP 57878 |
6.24 |
| 2026-09-28 00:00 |
11:52:39.14 |
+00:17:35.3 |
HIP 57878 |
6.55 |
| 2026-09-28 12:00 |
11:53:07.25 |
+00:14:12.2 |
HIP 57878 |
12.98 |
| 2026-09-29 00:00 |
11:53:35.34 |
+00:10:49.3 |
HIP 57878 |
20.39 |
| 2026-09-29 12:00 |
11:54:03.40 |
+00:07:26.5 |
HIP 58002 |
25.89 |
| 2026-09-30 00:00 |
11:54:31.43 |
+00:04:03.9 |
HIP 58002 |
30.83 |
| 2026-09-30 12:00 |
11:54:59.44 |
+00:00:41.4 |
HIP 58105 |
34.06 |
| 2026-10-01 00:00 |
11:55:27.41 |
-00:02:40.9 |
HIP 58105 |
31.40 |
| 2026-10-01 12:00 |
11:55:55.36 |
-00:06:03.0 |
HIP 58105 |
30.54 |
| 2026-10-02 00:00 |
11:56:23.28 |
-00:09:24.9 |
HIP 58105 |
31.61 |
| 2026-10-02 12:00 |
11:56:51.17 |
-00:12:46.7 |
HIP 58105 |
34.44 |
| 2026-10-03 00:00 |
11:57:19.02 |
-00:16:08.3 |
HIP 58461 |
34.63 |
| 2026-10-03 12:00 |
11:57:46.85 |
-00:19:29.8 |
HIP 58461 |
30.95 |
| 2026-10-04 00:00 |
11:58:14.65 |
-00:22:51.0 |
HIP 58461 |
28.92 |
| 2026-10-04 12:00 |
11:58:42.41 |
-00:26:12.1 |
HIP 58461 |
28.87 |
| 2026-10-05 00:00 |
11:59:10.14 |
-00:29:32.9 |
HIP 58461 |
30.82 |
| 2026-10-05 12:00 |
11:59:37.84 |
-00:32:53.6 |
HIP 58639 |
29.34 |
| 2026-10-06 00:00 |
12:00:05.51 |
-00:36:14.0 |
HIP 58639 |
24.64 |
| 2026-10-06 12:00 |
12:00:33.14 |
-00:39:34.3 |
HIP 58639 |
21.71 |
| 2026-10-07 00:00 |
12:01:00.73 |
-00:42:54.3 |
HIP 58639 |
21.29 |
| 2026-10-07 12:00 |
12:01:28.30 |
-00:46:14.1 |
HIP 58639 |
23.51 |
| 2026-10-08 00:00 |
12:01:55.82 |
-00:49:33.7 |
HIP 58800 |
25.53 |
| 2026-10-08 12:00 |
12:02:23.31 |
-00:52:53.1 |
HIP 58800 |
18.59 |
| 2026-10-09 00:00 |
12:02:50.76 |
-00:56:12.2 |
HIP 58800 |
12.51 |
| 2026-10-09 12:00 |
12:03:18.18 |
-00:59:31.1 |
HIP 58800 |
9.13 |
| 2026-10-10 00:00 |
12:03:45.55 |
-01:02:49.8 |
HIP 58800 |
11.23 |
| 2026-10-10 12:00 |
12:04:12.89 |
-01:06:08.2 |
HIP 58904 |
9.08 |
| 2026-10-11 00:00 |
12:04:40.18 |
-01:09:26.4 |
HIP 58904 |
1.58 |