メタデータ
| 項目 |
値 |
| Designation |
C/2024 X1 (Fazekas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-08-03T10:32:30.742080Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:18Z |
| Obs used |
170 |
| 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 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-07-11.0000000 |
| e |
0.59657588 |
| q (au) |
3.816719 |
| a (au) |
9.460810 |
| i (deg) |
6.464385 |
| Ω (om, deg) |
351.993786 |
| ω (w, deg) |
124.355061 |
| M (ma, deg) |
359.206119 |
等級
散乱 + 全体線形
$$
M_a = (7.869 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.869 |
| n |
6.000 |
| gf |
0.884 |
| gb |
-0.784 |
| k |
0.998 |
| δ90 |
3.956 |
| 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) |
| 2026-03-26 00:00 |
09:50:54.90 |
+15:44:09.7 |
HIP 48151 |
30.50 |
| 2026-03-26 12:00 |
09:50:48.19 |
+15:43:53.7 |
HIP 48151 |
28.89 |
| 2026-03-27 00:00 |
09:50:41.69 |
+15:43:36.5 |
HIP 48151 |
27.32 |
| 2026-03-27 12:00 |
09:50:35.40 |
+15:43:18.3 |
HIP 48151 |
25.80 |
| 2026-03-28 00:00 |
09:50:29.34 |
+15:42:58.9 |
HIP 48151 |
24.32 |
| 2026-03-28 12:00 |
09:50:23.49 |
+15:42:38.4 |
HIP 48151 |
22.89 |
| 2026-03-29 00:00 |
09:50:17.86 |
+15:42:16.9 |
HIP 48151 |
21.50 |
| 2026-03-29 12:00 |
09:50:12.45 |
+15:41:54.2 |
HIP 48151 |
20.16 |
| 2026-03-30 00:00 |
09:50:07.26 |
+15:41:30.5 |
HIP 48151 |
18.85 |
| 2026-03-30 12:00 |
09:50:02.29 |
+15:41:05.6 |
HIP 48151 |
17.59 |
| 2026-03-31 00:00 |
09:49:57.55 |
+15:40:39.7 |
HIP 48151 |
16.37 |
| 2026-03-31 12:00 |
09:49:53.02 |
+15:40:12.6 |
HIP 48151 |
15.19 |
| 2026-04-01 00:00 |
09:49:48.72 |
+15:39:44.5 |
HIP 48151 |
14.06 |
| 2026-04-01 12:00 |
09:49:44.64 |
+15:39:15.2 |
HIP 48151 |
12.96 |
| 2026-04-02 00:00 |
09:49:40.78 |
+15:38:44.9 |
HIP 48151 |
11.91 |
| 2026-04-02 12:00 |
09:49:37.15 |
+15:38:13.5 |
HIP 48151 |
10.90 |
| 2026-04-03 00:00 |
09:49:33.75 |
+15:37:41.0 |
HIP 48151 |
9.93 |
| 2026-04-03 12:00 |
09:49:30.56 |
+15:37:07.5 |
HIP 48151 |
9.01 |
| 2026-04-04 00:00 |
09:49:27.60 |
+15:36:32.8 |
HIP 48151 |
8.15 |
| 2026-04-04 12:00 |
09:49:24.87 |
+15:35:57.1 |
HIP 48151 |
7.35 |
| 2026-04-05 00:00 |
09:49:22.36 |
+15:35:20.2 |
HIP 48151 |
6.61 |
| 2026-04-05 12:00 |
09:49:20.08 |
+15:34:42.3 |
HIP 48151 |
5.97 |
| 2026-04-06 00:00 |
09:49:18.02 |
+15:34:03.4 |
HIP 48151 |
5.43 |
| 2026-04-06 12:00 |
09:49:16.19 |
+15:33:23.3 |
HIP 48151 |
5.02 |
| 2026-04-07 00:00 |
09:49:14.59 |
+15:32:42.2 |
HIP 48151 |
4.77 |
| 2026-04-07 12:00 |
09:49:13.21 |
+15:32:00.0 |
HIP 48151 |
4.70 |
| 2026-04-08 00:00 |
09:49:12.06 |
+15:31:16.8 |
HIP 48151 |
4.81 |
| 2026-04-08 12:00 |
09:49:11.13 |
+15:30:32.5 |
HIP 48151 |
5.09 |
| 2026-04-09 00:00 |
09:49:10.44 |
+15:29:47.1 |
HIP 48151 |
5.52 |
| 2026-04-09 12:00 |
09:49:09.96 |
+15:29:00.6 |
HIP 48151 |
6.06 |
| 2026-04-10 00:00 |
09:49:09.72 |
+15:28:13.1 |
HIP 48151 |
6.69 |
| 2026-04-10 12:00 |
09:49:09.70 |
+15:27:24.6 |
HIP 48151 |
7.39 |
| 2026-04-11 00:00 |
09:49:09.91 |
+15:26:35.0 |
HIP 48151 |
8.16 |
| 2026-04-11 12:00 |
09:49:10.34 |
+15:25:44.3 |
HIP 48151 |
8.97 |
| 2026-04-12 00:00 |
09:49:11.00 |
+15:24:52.6 |
HIP 48151 |
9.83 |
| 2026-04-12 12:00 |
09:49:11.89 |
+15:23:59.8 |
HIP 48151 |
10.72 |
| 2026-04-13 00:00 |
09:49:13.00 |
+15:23:06.0 |
HIP 48151 |
11.66 |
| 2026-04-13 12:00 |
09:49:14.34 |
+15:22:11.1 |
HIP 48151 |
12.62 |
| 2026-04-14 00:00 |
09:49:15.91 |
+15:21:15.2 |
HIP 48151 |
13.63 |
| 2026-04-14 12:00 |
09:49:17.70 |
+15:20:18.2 |
HIP 48151 |
14.67 |
| 2026-04-15 00:00 |
09:49:19.72 |
+15:19:20.2 |
HIP 48151 |
15.75 |
| 2026-04-15 12:00 |
09:49:21.96 |
+15:18:21.2 |
HIP 48151 |
16.86 |
| 2026-04-16 00:00 |
09:49:24.42 |
+15:17:21.1 |
HIP 48151 |
18.02 |