C/2024 Y1 (Masek)
| 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) |
| 2026-02-03 00:00 |
08:01:13.52 |
+35:41:08.6 |
HIP 39159 |
9.36 |
| 2026-02-03 12:00 |
08:00:48.45 |
+35:42:53.6 |
HIP 39159 |
6.87 |
| 2026-02-04 00:00 |
08:00:23.53 |
+35:44:37.0 |
HIP 39159 |
8.01 |
| 2026-02-04 12:00 |
07:59:58.74 |
+35:46:18.7 |
HIP 39159 |
11.72 |
| 2026-02-05 00:00 |
07:59:34.10 |
+35:47:58.7 |
HIP 39159 |
16.30 |
| 2026-02-05 12:00 |
07:59:09.61 |
+35:49:37.1 |
HIP 39094 |
17.49 |
| 2026-02-06 00:00 |
07:58:45.26 |
+35:51:13.7 |
HIP 39094 |
19.15 |
| 2026-02-06 12:00 |
07:58:21.06 |
+35:52:48.8 |
HIP 39094 |
21.92 |
| 2026-02-07 00:00 |
07:57:57.03 |
+35:54:22.1 |
HIP 39094 |
25.43 |
| 2026-02-07 12:00 |
07:57:33.15 |
+35:55:53.8 |
HIP 38735 |
21.32 |
| 2026-02-08 00:00 |
07:57:09.43 |
+35:57:23.9 |
HIP 38735 |
16.40 |
| 2026-02-08 12:00 |
07:56:45.87 |
+35:58:52.3 |
HIP 38735 |
11.61 |
| 2026-02-09 00:00 |
07:56:22.48 |
+36:00:19.1 |
HIP 38735 |
7.14 |
| 2026-02-09 12:00 |
07:55:59.26 |
+36:01:44.3 |
HIP 38735 |
4.00 |
| 2026-02-10 00:00 |
07:55:36.22 |
+36:03:07.9 |
HIP 38719 |
5.29 |
| 2026-02-10 12:00 |
07:55:13.35 |
+36:04:29.8 |
HIP 38719 |
8.21 |
| 2026-02-11 00:00 |
07:54:50.66 |
+36:05:50.1 |
HIP 38719 |
12.34 |
| 2026-02-11 12:00 |
07:54:28.15 |
+36:07:08.9 |
HIP 38719 |
16.77 |
| 2026-02-12 00:00 |
07:54:05.82 |
+36:08:26.0 |
HIP 38719 |
21.28 |
| 2026-02-12 12:00 |
07:53:43.68 |
+36:09:41.6 |
HIP 38422 |
18.93 |
| 2026-02-13 00:00 |
07:53:21.73 |
+36:10:55.6 |
HIP 38422 |
14.35 |
| 2026-02-13 12:00 |
07:52:59.97 |
+36:12:08.1 |
HIP 38422 |
9.84 |
| 2026-02-14 00:00 |
07:52:38.40 |
+36:13:19.0 |
HIP 38422 |
5.44 |
| 2026-02-14 12:00 |
07:52:17.03 |
+36:14:28.4 |
HIP 38422 |
1.75 |
| 2026-02-15 00:00 |
07:51:55.86 |
+36:15:36.2 |
HIP 38422 |
4.01 |
| 2026-02-15 12:00 |
07:51:34.89 |
+36:16:42.5 |
HIP 38422 |
8.21 |
| 2026-02-16 00:00 |
07:51:14.12 |
+36:17:47.3 |
HIP 38422 |
12.48 |
| 2026-02-16 12:00 |
07:50:53.55 |
+36:18:50.6 |
HIP 38422 |
16.73 |
| 2026-02-17 00:00 |
07:50:33.20 |
+36:19:52.4 |
HIP 38422 |
20.94 |
| 2026-02-17 12:00 |
07:50:13.05 |
+36:20:52.8 |
HIP 38422 |
25.12 |
| 2026-02-18 00:00 |
07:49:53.11 |
+36:21:51.7 |
HIP 38126 |
22.75 |
| 2026-02-18 12:00 |
07:49:33.39 |
+36:22:49.1 |
HIP 38126 |
19.83 |
| 2026-02-19 00:00 |
07:49:13.88 |
+36:23:45.0 |
HIP 38126 |
17.42 |
| 2026-02-19 12:00 |
07:48:54.59 |
+36:24:39.6 |
HIP 38098 |
14.98 |
| 2026-02-20 00:00 |
07:48:35.52 |
+36:25:32.7 |
HIP 38098 |
13.16 |
| 2026-02-20 12:00 |
07:48:16.67 |
+36:26:24.4 |
HIP 38098 |
12.39 |
| 2026-02-21 00:00 |
07:47:58.04 |
+36:27:14.8 |
HIP 38098 |
12.81 |
| 2026-02-21 12:00 |
07:47:39.63 |
+36:28:03.7 |
HIP 38098 |
14.26 |
| 2026-02-22 00:00 |
07:47:21.45 |
+36:28:51.3 |
HIP 38098 |
16.46 |
| 2026-02-22 12:00 |
07:47:03.50 |
+36:29:37.5 |
HIP 38098 |
19.10 |
| 2026-02-23 00:00 |
07:46:45.77 |
+36:30:22.4 |
HIP 38098 |
22.01 |
| 2026-02-23 12:00 |
07:46:28.27 |
+36:31:06.0 |
HIP 38098 |
25.08 |
| 2026-02-24 00:00 |
07:46:11.00 |
+36:31:48.2 |
HIP 37748 |
22.16 |