C/2024 X1 (Fazekas)
| Parameter |
Value |
| Designation |
C/2024 X1 (Fazekas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-08-03T16:35:25.866240Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:18Z |
| Obs used |
104 |
| NEO |
- |
| M1 |
13.200 |
| K1 |
6.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-12-11T05:13:51.398400Z |
| Discovery magnitude (MPC) |
19.36 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-02-10.0000000 |
| e |
0.59976892 |
| q (au) |
3.816004 |
| a (au) |
9.534502 |
| i (deg) |
6.456019 |
| Ω (om, deg) |
352.264968 |
| ω (w, deg) |
124.147662 |
| M (ma, deg) |
354.151719 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.823 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.823 |
| n |
6.000 |
| gf |
0.961 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.989 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
10:14:00.59 |
+14:55:10.7 |
HIP 50155 |
10.22 |
| 2026-02-03 12:00 |
10:13:46.04 |
+14:56:01.2 |
HIP 50155 |
11.57 |
| 2026-02-04 00:00 |
10:13:31.38 |
+14:56:51.8 |
HIP 50155 |
13.78 |
| 2026-02-04 12:00 |
10:13:16.62 |
+14:57:42.6 |
HIP 50155 |
16.52 |
| 2026-02-05 00:00 |
10:13:01.76 |
+14:58:33.5 |
HIP 49965 |
15.41 |
| 2026-02-05 12:00 |
10:12:46.80 |
+14:59:24.6 |
HIP 49965 |
12.59 |
| 2026-02-06 00:00 |
10:12:31.75 |
+15:00:15.7 |
HIP 49965 |
10.34 |
| 2026-02-06 12:00 |
10:12:16.60 |
+15:01:06.9 |
HIP 49965 |
9.11 |
| 2026-02-07 00:00 |
10:12:01.37 |
+15:01:58.2 |
HIP 49965 |
9.35 |
| 2026-02-07 12:00 |
10:11:46.06 |
+15:02:49.5 |
HIP 49965 |
10.98 |
| 2026-02-08 00:00 |
10:11:30.66 |
+15:03:40.8 |
HIP 49965 |
13.52 |
| 2026-02-08 12:00 |
10:11:15.19 |
+15:04:32.1 |
HIP 49965 |
16.57 |
| 2026-02-09 00:00 |
10:10:59.65 |
+15:05:23.4 |
HIP 49965 |
19.90 |
| 2026-02-09 12:00 |
10:10:44.05 |
+15:06:14.6 |
HIP 49758 |
20.51 |
| 2026-02-10 00:00 |
10:10:28.37 |
+15:07:05.8 |
HIP 49758 |
16.70 |
| 2026-02-10 12:00 |
10:10:12.64 |
+15:07:56.9 |
HIP 49758 |
12.91 |
| 2026-02-11 00:00 |
10:09:56.85 |
+15:08:47.9 |
HIP 49758 |
9.21 |
| 2026-02-11 12:00 |
10:09:41.01 |
+15:09:38.7 |
HIP 49758 |
5.77 |
| 2026-02-12 00:00 |
10:09:25.13 |
+15:10:29.4 |
HIP 49758 |
3.52 |
| 2026-02-12 12:00 |
10:09:09.20 |
+15:11:19.9 |
HIP 49758 |
4.73 |
| 2026-02-13 00:00 |
10:08:53.23 |
+15:12:10.3 |
HIP 49758 |
7.97 |
| 2026-02-13 12:00 |
10:08:37.22 |
+15:13:00.4 |
HIP 49758 |
11.66 |
| 2026-02-14 00:00 |
10:08:21.18 |
+15:13:50.3 |
HIP 49623 |
11.00 |
| 2026-02-14 12:00 |
10:08:05.12 |
+15:14:39.9 |
HIP 49623 |
8.10 |
| 2026-02-15 00:00 |
10:07:49.03 |
+15:15:29.3 |
HIP 49623 |
6.46 |
| 2026-02-15 12:00 |
10:07:32.93 |
+15:16:18.4 |
HIP 49623 |
7.02 |
| 2026-02-16 00:00 |
10:07:16.81 |
+15:17:07.1 |
HIP 49623 |
9.39 |
| 2026-02-16 12:00 |
10:07:00.68 |
+15:17:55.6 |
HIP 49623 |
12.60 |
| 2026-02-17 00:00 |
10:06:44.54 |
+15:18:43.6 |
HIP 49623 |
16.15 |
| 2026-02-17 12:00 |
10:06:28.40 |
+15:19:31.3 |
HIP 49623 |
19.85 |
| 2026-02-18 00:00 |
10:06:12.27 |
+15:20:18.6 |
HIP 49395 |
20.62 |
| 2026-02-18 12:00 |
10:05:56.14 |
+15:21:05.5 |
HIP 49395 |
18.19 |
| 2026-02-19 00:00 |
10:05:40.02 |
+15:21:51.9 |
HIP 49395 |
16.37 |
| 2026-02-19 12:00 |
10:05:23.92 |
+15:22:37.9 |
HIP 49395 |
15.37 |
| 2026-02-20 00:00 |
10:05:07.84 |
+15:23:23.4 |
HIP 49395 |
15.35 |
| 2026-02-20 12:00 |
10:04:51.78 |
+15:24:08.4 |
HIP 49395 |
16.31 |
| 2026-02-21 00:00 |
10:04:35.76 |
+15:24:52.9 |
HIP 49395 |
18.09 |
| 2026-02-21 12:00 |
10:04:19.76 |
+15:25:36.9 |
HIP 49395 |
20.46 |
| 2026-02-22 00:00 |
10:04:03.80 |
+15:26:20.3 |
HIP 49395 |
23.25 |
| 2026-02-22 12:00 |
10:03:47.88 |
+15:27:03.2 |
HIP 49168 |
25.83 |
| 2026-02-23 00:00 |
10:03:32.01 |
+15:27:45.5 |
HIP 49168 |
22.28 |
| 2026-02-23 12:00 |
10:03:16.18 |
+15:28:27.1 |
HIP 49168 |
18.88 |
| 2026-02-24 00:00 |
10:03:00.41 |
+15:29:08.2 |
HIP 49168 |
15.71 |