| Parameter |
Value |
| Designation |
C/2024 G1 (Wierzchos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-10-21T02:22:13.702080Z |
| Orbit solution date (soln_date, UTC) |
2025-05-08T09:42:17Z |
| Obs used |
112 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
16.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-07-09.0000000 |
| e |
0.96744521 |
| q (au) |
3.930143 |
| a (au) |
120.723934 |
| i (deg) |
95.400994 |
| Ω (om, deg) |
30.599798 |
| ω (w, deg) |
128.228357 |
| M (ma, deg) |
359.922650 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.233 + 5.712\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.233 |
| n |
5.712 |
| gf |
0.958 |
| gb |
-0.521 |
| 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) |
| 2026-07-29 00:00 |
12:22:08.60 |
-31:04:07.5 |
HIP 60462 |
26.75 |
| 2026-07-29 12:00 |
12:22:13.59 |
-31:04:43.0 |
HIP 60462 |
26.35 |
| 2026-07-30 00:00 |
12:22:18.69 |
-31:05:19.6 |
HIP 60462 |
26.00 |
| 2026-07-30 12:00 |
12:22:23.92 |
-31:05:57.2 |
HIP 60462 |
25.71 |
| 2026-07-31 00:00 |
12:22:29.26 |
-31:06:35.9 |
HIP 60462 |
25.47 |
| 2026-07-31 12:00 |
12:22:34.72 |
-31:07:15.7 |
HIP 60462 |
25.30 |
| 2026-08-01 00:00 |
12:22:40.30 |
-31:07:56.5 |
HIP 60521 |
24.78 |
| 2026-08-01 12:00 |
12:22:45.99 |
-31:08:38.3 |
HIP 60521 |
24.05 |
| 2026-08-02 00:00 |
12:22:51.80 |
-31:09:21.2 |
HIP 60521 |
23.37 |
| 2026-08-02 12:00 |
12:22:57.73 |
-31:10:05.2 |
HIP 60521 |
22.75 |
| 2026-08-03 00:00 |
12:23:03.76 |
-31:10:50.2 |
HIP 60521 |
22.21 |
| 2026-08-03 12:00 |
12:23:09.91 |
-31:11:36.2 |
HIP 60521 |
21.75 |
| 2026-08-04 00:00 |
12:23:16.17 |
-31:12:23.3 |
HIP 60521 |
21.38 |
| 2026-08-04 12:00 |
12:23:22.54 |
-31:13:11.4 |
HIP 60521 |
21.13 |
| 2026-08-05 00:00 |
12:23:29.02 |
-31:14:00.6 |
HIP 60521 |
20.99 |
| 2026-08-05 12:00 |
12:23:35.61 |
-31:14:50.9 |
HIP 60521 |
20.98 |
| 2026-08-06 00:00 |
12:23:42.31 |
-31:15:42.1 |
HIP 60521 |
21.10 |
| 2026-08-06 12:00 |
12:23:49.11 |
-31:16:34.5 |
HIP 60521 |
21.37 |
| 2026-08-07 00:00 |
12:23:56.02 |
-31:17:27.8 |
HIP 60521 |
21.77 |
| 2026-08-07 12:00 |
12:24:03.03 |
-31:18:22.2 |
HIP 60521 |
22.31 |
| 2026-08-08 00:00 |
12:24:10.15 |
-31:19:17.7 |
HIP 60521 |
22.99 |
| 2026-08-08 12:00 |
12:24:17.37 |
-31:20:14.2 |
HIP 60521 |
23.80 |
| 2026-08-09 00:00 |
12:24:24.69 |
-31:21:11.7 |
HIP 60521 |
24.74 |
| 2026-08-09 12:00 |
12:24:32.11 |
-31:22:10.3 |
HIP 60521 |
25.79 |
| 2026-08-10 00:00 |
12:24:39.63 |
-31:23:09.9 |
HIP 60521 |
26.94 |
| 2026-08-10 12:00 |
12:24:47.26 |
-31:24:10.5 |
HIP 60703 |
25.60 |
| 2026-08-11 00:00 |
12:24:54.98 |
-31:25:12.2 |
HIP 60703 |
23.66 |
| 2026-08-11 12:00 |
12:25:02.79 |
-31:26:14.9 |
HIP 60703 |
21.69 |
| 2026-08-12 00:00 |
12:25:10.71 |
-31:27:18.6 |
HIP 60703 |
19.69 |
| 2026-08-12 12:00 |
12:25:18.72 |
-31:28:23.4 |
HIP 60703 |
17.67 |
| 2026-08-13 00:00 |
12:25:26.82 |
-31:29:29.2 |
HIP 60703 |
15.63 |
| 2026-08-13 12:00 |
12:25:35.01 |
-31:30:36.0 |
HIP 60703 |
13.56 |
| 2026-08-14 00:00 |
12:25:43.30 |
-31:31:43.9 |
HIP 60703 |
11.46 |
| 2026-08-14 12:00 |
12:25:51.68 |
-31:32:52.8 |
HIP 60703 |
9.34 |
| 2026-08-15 00:00 |
12:26:00.15 |
-31:34:02.6 |
HIP 60703 |
7.19 |
| 2026-08-15 12:00 |
12:26:08.71 |
-31:35:13.5 |
HIP 60703 |
5.02 |
| 2026-08-16 00:00 |
12:26:17.35 |
-31:36:25.5 |
HIP 60703 |
2.83 |
| 2026-08-16 12:00 |
12:26:26.08 |
-31:37:38.4 |
HIP 60703 |
0.66 |
| 2026-08-17 00:00 |
12:26:34.90 |
-31:38:52.3 |
HIP 60703 |
1.68 |
| 2026-08-17 12:00 |
12:26:43.80 |
-31:40:07.3 |
HIP 60703 |
3.93 |
| 2026-08-18 00:00 |
12:26:52.79 |
-31:41:23.2 |
HIP 60703 |
6.22 |
| 2026-08-18 12:00 |
12:27:01.86 |
-31:42:40.2 |
HIP 60703 |
8.54 |
| 2026-08-19 00:00 |
12:27:11.01 |
-31:43:58.1 |
HIP 60769 |
9.17 |