| Parameter |
Value |
| Designation |
C/2024 N3 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-11T09:52:02.712000Z |
| Orbit solution date (soln_date, UTC) |
2026-04-30T15:12:15Z |
| Obs used |
644 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
11.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-08T21:31:16.608000Z |
| Discovery magnitude (MPC) |
19.60 R |
| Discovery observatory (MPC) |
K88 · GINOP-KHK, Piszkéstető |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-04-13.0000000 |
| e |
1.00125943 |
| q (au) |
5.014578 |
| a (au) |
-3981.629229 |
| i (deg) |
88.728946 |
| Ω (om, deg) |
82.608524 |
| ω (w, deg) |
86.881908 |
| M (ma, deg) |
0.000006 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.339 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.339 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2023-10-09 |
2025-04-08 |
+8.8492 |
-6.078 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
18:02:19.17 |
+32:10:12.8 |
HIP 88408 |
16.75 |
| 2026-05-12 12:00 |
18:01:57.46 |
+32:10:00.8 |
HIP 88408 |
19.69 |
| 2026-05-13 00:00 |
18:01:35.61 |
+32:09:46.8 |
HIP 88408 |
23.18 |
| 2026-05-13 12:00 |
18:01:13.60 |
+32:09:30.7 |
HIP 88408 |
27.03 |
| 2026-05-14 00:00 |
18:00:51.45 |
+32:09:12.6 |
HIP 88057 |
29.65 |
| 2026-05-14 12:00 |
18:00:29.15 |
+32:08:52.4 |
HIP 88057 |
26.49 |
| 2026-05-15 00:00 |
18:00:06.70 |
+32:08:30.0 |
HIP 88057 |
23.87 |
| 2026-05-15 12:00 |
17:59:44.12 |
+32:08:05.6 |
HIP 88057 |
21.99 |
| 2026-05-16 00:00 |
17:59:21.39 |
+32:07:39.0 |
HIP 88057 |
21.09 |
| 2026-05-16 12:00 |
17:58:58.53 |
+32:07:10.2 |
HIP 88057 |
21.31 |
| 2026-05-17 00:00 |
17:58:35.54 |
+32:06:39.2 |
HIP 88057 |
22.63 |
| 2026-05-17 12:00 |
17:58:12.41 |
+32:06:06.0 |
HIP 87828 |
22.95 |
| 2026-05-18 00:00 |
17:57:49.16 |
+32:05:30.7 |
HIP 87828 |
18.36 |
| 2026-05-18 12:00 |
17:57:25.78 |
+32:04:53.0 |
HIP 87828 |
14.01 |
| 2026-05-19 00:00 |
17:57:02.28 |
+32:04:13.2 |
HIP 87828 |
10.27 |
| 2026-05-19 12:00 |
17:56:38.65 |
+32:03:31.1 |
HIP 87828 |
8.09 |
| 2026-05-20 00:00 |
17:56:14.91 |
+32:02:46.7 |
HIP 87828 |
8.79 |
| 2026-05-20 12:00 |
17:55:51.06 |
+32:02:00.0 |
HIP 87828 |
11.90 |
| 2026-05-21 00:00 |
17:55:27.09 |
+32:01:11.0 |
HIP 87828 |
16.12 |
| 2026-05-21 12:00 |
17:55:03.01 |
+32:00:19.7 |
HIP 87828 |
20.79 |
| 2026-05-22 00:00 |
17:54:38.83 |
+31:59:26.0 |
HIP 87828 |
25.70 |
| 2026-05-22 12:00 |
17:54:14.54 |
+31:58:30.1 |
HIP 87577 |
25.58 |
| 2026-05-23 00:00 |
17:53:50.15 |
+31:57:31.7 |
HIP 87459 |
20.79 |
| 2026-05-23 12:00 |
17:53:25.67 |
+31:56:31.1 |
HIP 87459 |
15.94 |
| 2026-05-24 00:00 |
17:53:01.09 |
+31:55:28.0 |
HIP 87459 |
11.46 |
| 2026-05-24 12:00 |
17:52:36.41 |
+31:54:22.6 |
HIP 87459 |
8.11 |
| 2026-05-25 00:00 |
17:52:11.65 |
+31:53:14.8 |
HIP 87459 |
7.60 |
| 2026-05-25 12:00 |
17:51:46.80 |
+31:52:04.6 |
HIP 87459 |
10.41 |
| 2026-05-26 00:00 |
17:51:21.87 |
+31:50:51.9 |
HIP 87459 |
14.79 |
| 2026-05-26 12:00 |
17:50:56.86 |
+31:49:36.9 |
HIP 87459 |
19.73 |
| 2026-05-27 00:00 |
17:50:31.76 |
+31:48:19.5 |
HIP 87459 |
24.92 |
| 2026-05-27 12:00 |
17:50:06.60 |
+31:46:59.6 |
HIP 87459 |
30.25 |
| 2026-05-28 00:00 |
17:49:41.36 |
+31:45:37.3 |
HIP 87459 |
35.67 |
| 2026-05-28 12:00 |
17:49:16.05 |
+31:44:12.5 |
HIP 87459 |
41.15 |
| 2026-05-29 00:00 |
17:48:50.67 |
+31:42:45.3 |
HIP 86950 |
40.10 |
| 2026-05-29 12:00 |
17:48:25.23 |
+31:41:15.7 |
HIP 86950 |
36.14 |
| 2026-05-30 00:00 |
17:47:59.73 |
+31:39:43.5 |
HIP 86925 |
31.17 |
| 2026-05-30 12:00 |
17:47:34.18 |
+31:38:09.0 |
HIP 86925 |
25.51 |
| 2026-05-31 00:00 |
17:47:08.56 |
+31:36:31.9 |
HIP 86925 |
19.83 |
| 2026-05-31 12:00 |
17:46:42.90 |
+31:34:52.4 |
HIP 86925 |
14.12 |
| 2026-06-01 00:00 |
17:46:17.18 |
+31:33:10.4 |
HIP 86925 |
8.39 |
| 2026-06-01 12:00 |
17:45:51.42 |
+31:31:25.9 |
HIP 86925 |
2.65 |
| 2026-06-02 00:00 |
17:45:25.62 |
+31:29:38.9 |
HIP 86925 |
3.18 |