| Parameter |
Value |
| Designation |
C/2024 Y1 (Masek) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-26T20:36:13.553280Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:00Z |
| Obs used |
98 |
| NEO |
- |
| M1 |
17.800 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-12-25T01:50:03.552000Z |
| Discovery magnitude (MPC) |
15.30 V |
| Discovery observatory (MPC) |
I47 · Pierre Auger Observatory, Malargüe |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-12-31.0000000 |
| e |
0.98668110 |
| q (au) |
0.822345 |
| a (au) |
61.742672 |
| i (deg) |
64.749901 |
| Ω (om, deg) |
112.545653 |
| ω (w, deg) |
238.138955 |
| M (ma, deg) |
0.069360 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.657 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.657 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
07:45:26.60 |
+35:57:41.5 |
HIP 37770 |
11.20 |
| 2026-05-12 12:00 |
07:45:39.60 |
+35:57:05.0 |
HIP 37770 |
13.14 |
| 2026-05-13 00:00 |
07:45:52.72 |
+35:56:28.5 |
HIP 37770 |
15.34 |
| 2026-05-13 12:00 |
07:46:05.94 |
+35:55:51.9 |
HIP 37770 |
17.71 |
| 2026-05-14 00:00 |
07:46:19.27 |
+35:55:15.3 |
HIP 37770 |
20.19 |
| 2026-05-14 12:00 |
07:46:32.71 |
+35:54:38.6 |
HIP 37770 |
22.77 |
| 2026-05-15 00:00 |
07:46:46.26 |
+35:54:01.9 |
HIP 37770 |
25.41 |
| 2026-05-15 12:00 |
07:46:59.91 |
+35:53:25.1 |
HIP 38053 |
24.15 |
| 2026-05-16 00:00 |
07:47:13.67 |
+35:52:48.3 |
HIP 38053 |
22.37 |
| 2026-05-16 12:00 |
07:47:27.54 |
+35:52:11.5 |
HIP 38053 |
20.82 |
| 2026-05-17 00:00 |
07:47:41.50 |
+35:51:34.7 |
HIP 38053 |
19.57 |
| 2026-05-17 12:00 |
07:47:55.57 |
+35:50:57.8 |
HIP 38053 |
18.69 |
| 2026-05-18 00:00 |
07:48:09.74 |
+35:50:20.9 |
HIP 38053 |
18.24 |
| 2026-05-18 12:00 |
07:48:24.00 |
+35:49:44.0 |
HIP 38053 |
18.26 |
| 2026-05-19 00:00 |
07:48:38.37 |
+35:49:07.0 |
HIP 38053 |
18.77 |
| 2026-05-19 12:00 |
07:48:52.83 |
+35:48:30.1 |
HIP 38053 |
19.73 |
| 2026-05-20 00:00 |
07:49:07.38 |
+35:47:53.1 |
HIP 38053 |
21.10 |
| 2026-05-20 12:00 |
07:49:22.03 |
+35:47:16.1 |
HIP 38053 |
22.79 |
| 2026-05-21 00:00 |
07:49:36.78 |
+35:46:39.1 |
HIP 38053 |
24.77 |
| 2026-05-21 12:00 |
07:49:51.61 |
+35:46:02.1 |
HIP 38053 |
26.96 |
| 2026-05-22 00:00 |
07:50:06.54 |
+35:45:25.1 |
HIP 38053 |
29.33 |
| 2026-05-22 12:00 |
07:50:21.56 |
+35:44:48.1 |
HIP 38053 |
31.84 |
| 2026-05-23 00:00 |
07:50:36.66 |
+35:44:11.1 |
HIP 38409 |
31.93 |
| 2026-05-23 12:00 |
07:50:51.85 |
+35:43:34.1 |
HIP 38409 |
30.78 |
| 2026-05-24 00:00 |
07:51:07.13 |
+35:42:57.2 |
HIP 38409 |
29.90 |
| 2026-05-24 12:00 |
07:51:22.49 |
+35:42:20.2 |
HIP 38409 |
29.33 |
| 2026-05-25 00:00 |
07:51:37.94 |
+35:41:43.2 |
HIP 38409 |
29.10 |
| 2026-05-25 12:00 |
07:51:53.47 |
+35:41:06.3 |
HIP 38409 |
29.21 |
| 2026-05-26 00:00 |
07:52:09.08 |
+35:40:29.4 |
HIP 38409 |
29.67 |
| 2026-05-26 12:00 |
07:52:24.78 |
+35:39:52.4 |
HIP 38409 |
30.46 |
| 2026-05-27 00:00 |
07:52:40.55 |
+35:39:15.6 |
HIP 38409 |
31.57 |
| 2026-05-27 12:00 |
07:52:56.40 |
+35:38:38.7 |
HIP 38409 |
32.97 |
| 2026-05-28 00:00 |
07:53:12.33 |
+35:38:01.8 |
HIP 38723 |
33.01 |
| 2026-05-28 12:00 |
07:53:28.33 |
+35:37:25.0 |
HIP 38723 |
29.79 |
| 2026-05-29 00:00 |
07:53:44.42 |
+35:36:48.2 |
HIP 38723 |
26.58 |
| 2026-05-29 12:00 |
07:54:00.57 |
+35:36:11.5 |
HIP 38723 |
23.39 |
| 2026-05-30 00:00 |
07:54:16.80 |
+35:35:34.7 |
HIP 38723 |
20.24 |
| 2026-05-30 12:00 |
07:54:33.11 |
+35:34:58.0 |
HIP 38723 |
17.16 |
| 2026-05-31 00:00 |
07:54:49.48 |
+35:34:21.4 |
HIP 38723 |
14.19 |
| 2026-05-31 12:00 |
07:55:05.93 |
+35:33:44.7 |
HIP 38723 |
11.46 |
| 2026-06-01 00:00 |
07:55:22.45 |
+35:33:08.1 |
HIP 38723 |
9.17 |
| 2026-06-01 12:00 |
07:55:39.03 |
+35:32:31.6 |
HIP 38723 |
7.77 |
| 2026-06-02 00:00 |
07:55:55.69 |
+35:31:55.1 |
HIP 38723 |
7.76 |