C/2024 N4 (Sarneczky)
| Parameter |
Value |
| Designation |
C/2024 N4 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-01-09T22:44:40.113600Z |
| Orbit solution date (soln_date, UTC) |
2026-01-07T15:42:42Z |
| Obs used |
452 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-14T23:03:55.584000Z |
| Discovery magnitude (MPC) |
19.00 R |
| Discovery observatory (MPC) |
K88 · GINOP-KHK, Piszkéstető |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-12-23.0000000 |
| e |
1.00454025 |
| q (au) |
5.397605 |
| a (au) |
-1188.834728 |
| i (deg) |
49.771220 |
| Ω (om, deg) |
339.662654 |
| ω (w, deg) |
116.674530 |
| M (ma, deg) |
-0.000432 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.111 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.111 |
| n |
6.000 |
| gf |
0.978 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.943 |
| 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 |
10:26:03.01 |
+32:26:18.0 |
HIP 51044 |
19.83 |
| 2026-02-03 12:00 |
10:25:43.70 |
+32:25:58.2 |
HIP 51044 |
19.67 |
| 2026-02-04 00:00 |
10:25:24.31 |
+32:25:37.4 |
HIP 51044 |
20.36 |
| 2026-02-04 12:00 |
10:25:04.84 |
+32:25:15.8 |
HIP 51044 |
21.83 |
| 2026-02-05 00:00 |
10:24:45.31 |
+32:24:53.1 |
HIP 51044 |
23.95 |
| 2026-02-05 12:00 |
10:24:25.71 |
+32:24:29.6 |
HIP 50920 |
23.84 |
| 2026-02-06 00:00 |
10:24:06.05 |
+32:24:05.1 |
HIP 50920 |
22.65 |
| 2026-02-06 12:00 |
10:23:46.32 |
+32:23:39.6 |
HIP 50920 |
22.18 |
| 2026-02-07 00:00 |
10:23:26.54 |
+32:23:13.1 |
HIP 50920 |
22.48 |
| 2026-02-07 12:00 |
10:23:06.70 |
+32:22:45.6 |
HIP 50920 |
23.54 |
| 2026-02-08 00:00 |
10:22:46.81 |
+32:22:17.1 |
HIP 50920 |
25.25 |
| 2026-02-08 12:00 |
10:22:26.86 |
+32:21:47.6 |
HIP 50660 |
21.39 |
| 2026-02-09 00:00 |
10:22:06.87 |
+32:21:17.0 |
HIP 50660 |
17.27 |
| 2026-02-09 12:00 |
10:21:46.84 |
+32:20:45.4 |
HIP 50660 |
13.22 |
| 2026-02-10 00:00 |
10:21:26.76 |
+32:20:12.8 |
HIP 50660 |
9.36 |
| 2026-02-10 12:00 |
10:21:06.65 |
+32:19:39.1 |
HIP 50660 |
6.09 |
| 2026-02-11 00:00 |
10:20:46.50 |
+32:19:04.3 |
HIP 50660 |
4.84 |
| 2026-02-11 12:00 |
10:20:26.32 |
+32:18:28.4 |
HIP 50660 |
6.85 |
| 2026-02-12 00:00 |
10:20:06.11 |
+32:17:51.5 |
HIP 50660 |
10.38 |
| 2026-02-12 12:00 |
10:19:45.87 |
+32:17:13.4 |
HIP 50506 |
12.20 |
| 2026-02-13 00:00 |
10:19:25.61 |
+32:16:34.2 |
HIP 50506 |
9.23 |
| 2026-02-13 12:00 |
10:19:05.33 |
+32:15:53.9 |
HIP 50506 |
7.72 |
| 2026-02-14 00:00 |
10:18:45.03 |
+32:15:12.4 |
HIP 50506 |
8.47 |
| 2026-02-14 12:00 |
10:18:24.72 |
+32:14:29.9 |
HIP 50453 |
7.61 |
| 2026-02-15 00:00 |
10:18:04.39 |
+32:13:46.1 |
HIP 50453 |
5.79 |
| 2026-02-15 12:00 |
10:17:44.06 |
+32:13:01.2 |
HIP 50453 |
6.86 |
| 2026-02-16 00:00 |
10:17:23.73 |
+32:12:15.2 |
HIP 50453 |
9.92 |
| 2026-02-16 12:00 |
10:17:03.39 |
+32:11:27.9 |
HIP 50453 |
13.71 |
| 2026-02-17 00:00 |
10:16:43.06 |
+32:10:39.5 |
HIP 50453 |
17.77 |
| 2026-02-17 12:00 |
10:16:22.73 |
+32:09:49.9 |
HIP 50453 |
21.95 |
| 2026-02-18 00:00 |
10:16:02.40 |
+32:08:59.1 |
HIP 50453 |
26.20 |
| 2026-02-18 12:00 |
10:15:42.09 |
+32:08:07.1 |
HIP 50453 |
30.48 |
| 2026-02-19 00:00 |
10:15:21.80 |
+32:07:13.9 |
HIP 50453 |
34.79 |
| 2026-02-19 12:00 |
10:15:01.52 |
+32:06:19.5 |
HIP 50136 |
34.58 |
| 2026-02-20 00:00 |
10:14:41.26 |
+32:05:23.9 |
HIP 50136 |
32.47 |
| 2026-02-20 12:00 |
10:14:21.02 |
+32:04:27.1 |
HIP 50136 |
30.83 |
| 2026-02-21 00:00 |
10:14:00.81 |
+32:03:29.0 |
HIP 50136 |
29.73 |
| 2026-02-21 12:00 |
10:13:40.64 |
+32:02:29.7 |
HIP 50136 |
29.24 |
| 2026-02-22 00:00 |
10:13:20.49 |
+32:01:29.1 |
HIP 49906 |
26.94 |
| 2026-02-22 12:00 |
10:13:00.38 |
+32:00:27.4 |
HIP 49906 |
23.51 |
| 2026-02-23 00:00 |
10:12:40.31 |
+31:59:24.4 |
HIP 49906 |
20.47 |
| 2026-02-23 12:00 |
10:12:20.28 |
+31:58:20.1 |
HIP 49906 |
18.00 |
| 2026-02-24 00:00 |
10:12:00.30 |
+31:57:14.6 |
HIP 49906 |
16.38 |