| Parameter |
Value |
| Designation |
C/2024 V2 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-03T19:07:47.573760Z |
| Orbit solution date (soln_date, UTC) |
2024-12-26T20:12:37Z |
| Obs used |
58 |
| NEO |
- |
| M1 |
15.100 |
| K1 |
47.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-11-10T02:20:07.584000Z |
| Discovery magnitude (MPC) |
19.80 G |
| Discovery observatory (MPC) |
K88 · GINOP-KHK, Piszkéstető |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-11-16.0000000 |
| e |
0.96679404 |
| q (au) |
1.242723 |
| a (au) |
37.424696 |
| i (deg) |
95.966210 |
| Ω (om, deg) |
102.188455 |
| ω (w, deg) |
13.688779 |
| M (ma, deg) |
0.052533 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.641 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.641 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.895 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
18:22:51.23 |
+10:27:35.2 |
HIP 90168 |
17.62 |
| 2026-09-20 12:00 |
18:22:50.15 |
+10:24:22.4 |
HIP 90168 |
19.10 |
| 2026-09-21 00:00 |
18:22:49.21 |
+10:21:10.1 |
HIP 90168 |
20.95 |
| 2026-09-21 12:00 |
18:22:48.42 |
+10:17:58.3 |
HIP 90042 |
21.82 |
| 2026-09-22 00:00 |
18:22:47.77 |
+10:14:47.0 |
HIP 90042 |
18.72 |
| 2026-09-22 12:00 |
18:22:47.27 |
+10:11:36.2 |
HIP 90042 |
15.68 |
| 2026-09-23 00:00 |
18:22:46.91 |
+10:08:26.0 |
HIP 90042 |
12.74 |
| 2026-09-23 12:00 |
18:22:46.69 |
+10:05:16.3 |
HIP 90042 |
9.96 |
| 2026-09-24 00:00 |
18:22:46.62 |
+10:02:07.1 |
HIP 90042 |
7.54 |
| 2026-09-24 12:00 |
18:22:46.69 |
+09:58:58.5 |
HIP 90042 |
5.88 |
| 2026-09-25 00:00 |
18:22:46.90 |
+09:55:50.5 |
HIP 90042 |
5.70 |
| 2026-09-25 12:00 |
18:22:47.25 |
+09:52:43.0 |
HIP 90042 |
7.10 |
| 2026-09-26 00:00 |
18:22:47.74 |
+09:49:36.1 |
HIP 90042 |
9.38 |
| 2026-09-26 12:00 |
18:22:48.36 |
+09:46:29.8 |
HIP 90042 |
12.05 |
| 2026-09-27 00:00 |
18:22:49.13 |
+09:43:24.1 |
HIP 90042 |
14.90 |
| 2026-09-27 12:00 |
18:22:50.03 |
+09:40:19.0 |
HIP 90042 |
17.84 |
| 2026-09-28 00:00 |
18:22:51.08 |
+09:37:14.5 |
HIP 90042 |
20.82 |
| 2026-09-28 12:00 |
18:22:52.25 |
+09:34:10.6 |
HIP 90042 |
23.83 |
| 2026-09-29 00:00 |
18:22:53.57 |
+09:31:07.3 |
HIP 90167 |
26.80 |
| 2026-09-29 12:00 |
18:22:55.02 |
+09:28:04.7 |
HIP 90167 |
29.11 |
| 2026-09-30 00:00 |
18:22:56.60 |
+09:25:02.7 |
HIP 89990 |
29.94 |
| 2026-09-30 12:00 |
18:22:58.32 |
+09:22:01.3 |
HIP 89990 |
27.95 |
| 2026-10-01 00:00 |
18:23:00.17 |
+09:19:00.5 |
HIP 89990 |
26.21 |
| 2026-10-01 12:00 |
18:23:02.16 |
+09:16:00.4 |
HIP 89990 |
24.74 |
| 2026-10-02 00:00 |
18:23:04.28 |
+09:13:01.0 |
HIP 89990 |
23.62 |
| 2026-10-02 12:00 |
18:23:06.53 |
+09:10:02.2 |
HIP 89990 |
22.88 |
| 2026-10-03 00:00 |
18:23:08.91 |
+09:07:04.1 |
HIP 89990 |
22.56 |
| 2026-10-03 12:00 |
18:23:11.42 |
+09:04:06.7 |
HIP 89990 |
22.68 |
| 2026-10-04 00:00 |
18:23:14.06 |
+09:01:09.9 |
HIP 89990 |
23.22 |
| 2026-10-04 12:00 |
18:23:16.83 |
+08:58:13.9 |
HIP 90172 |
21.91 |
| 2026-10-05 00:00 |
18:23:19.73 |
+08:55:18.5 |
HIP 90172 |
19.05 |
| 2026-10-05 12:00 |
18:23:22.76 |
+08:52:23.8 |
HIP 90172 |
16.22 |
| 2026-10-06 00:00 |
18:23:25.92 |
+08:49:29.9 |
HIP 90172 |
13.46 |
| 2026-10-06 12:00 |
18:23:29.20 |
+08:46:36.6 |
HIP 90172 |
10.81 |
| 2026-10-07 00:00 |
18:23:32.61 |
+08:43:44.1 |
HIP 90172 |
8.38 |
| 2026-10-07 12:00 |
18:23:36.15 |
+08:40:52.3 |
HIP 90172 |
6.43 |
| 2026-10-08 00:00 |
18:23:39.81 |
+08:38:01.2 |
HIP 90172 |
5.47 |
| 2026-10-08 12:00 |
18:23:43.60 |
+08:35:10.8 |
HIP 90172 |
6.00 |
| 2026-10-09 00:00 |
18:23:47.51 |
+08:32:21.2 |
HIP 90172 |
7.72 |
| 2026-10-09 12:00 |
18:23:51.54 |
+08:29:32.4 |
HIP 90172 |
10.03 |
| 2026-10-10 00:00 |
18:23:55.69 |
+08:26:44.3 |
HIP 90172 |
12.61 |
| 2026-10-10 12:00 |
18:23:59.97 |
+08:23:57.0 |
HIP 90172 |
15.33 |
| 2026-10-11 00:00 |
18:24:04.37 |
+08:21:10.4 |
HIP 90172 |
18.12 |