C/2020 H3 (Wierzchos)
| Parameter |
Value |
| Designation |
C/2020 H3 (Wierzchos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-06-03T13:35:43.509120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:05Z |
| Obs used |
131 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
27.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-06-11.0000000 |
| e |
1.00221882 |
| q (au) |
2.304388 |
| a (au) |
-1038.566850 |
| i (deg) |
62.368384 |
| Ω (om, deg) |
270.569348 |
| ω (w, deg) |
29.607609 |
| M (ma, deg) |
0.000219 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.149 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.149 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.916 |
| 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) |
| 2026-02-03 00:00 |
05:13:34.49 |
+37:03:25.4 |
HIP 24379 |
3.29 |
| 2026-02-03 12:00 |
05:13:29.66 |
+37:02:43.8 |
HIP 24379 |
3.98 |
| 2026-02-04 00:00 |
05:13:24.92 |
+37:02:02.2 |
HIP 24379 |
4.86 |
| 2026-02-04 12:00 |
05:13:20.25 |
+37:01:20.5 |
HIP 24379 |
5.82 |
| 2026-02-05 00:00 |
05:13:15.65 |
+37:00:38.8 |
HIP 24379 |
6.84 |
| 2026-02-05 12:00 |
05:13:11.14 |
+36:59:57.1 |
HIP 24379 |
7.87 |
| 2026-02-06 00:00 |
05:13:06.70 |
+36:59:15.3 |
HIP 24379 |
8.92 |
| 2026-02-06 12:00 |
05:13:02.34 |
+36:58:33.5 |
HIP 24379 |
9.97 |
| 2026-02-07 00:00 |
05:12:58.06 |
+36:57:51.7 |
HIP 24379 |
11.01 |
| 2026-02-07 12:00 |
05:12:53.85 |
+36:57:09.9 |
HIP 24379 |
12.06 |
| 2026-02-08 00:00 |
05:12:49.73 |
+36:56:28.1 |
HIP 24379 |
13.10 |
| 2026-02-08 12:00 |
05:12:45.69 |
+36:55:46.2 |
HIP 24379 |
14.13 |
| 2026-02-09 00:00 |
05:12:41.72 |
+36:55:04.4 |
HIP 24379 |
15.15 |
| 2026-02-09 12:00 |
05:12:37.84 |
+36:54:22.5 |
HIP 24379 |
16.16 |
| 2026-02-10 00:00 |
05:12:34.03 |
+36:53:40.7 |
HIP 24379 |
17.16 |
| 2026-02-10 12:00 |
05:12:30.31 |
+36:52:58.8 |
HIP 24379 |
18.15 |
| 2026-02-11 00:00 |
05:12:26.66 |
+36:52:17.0 |
HIP 24379 |
19.13 |
| 2026-02-11 12:00 |
05:12:23.10 |
+36:51:35.2 |
HIP 24379 |
20.10 |
| 2026-02-12 00:00 |
05:12:19.61 |
+36:50:53.3 |
HIP 24398 |
20.98 |
| 2026-02-12 12:00 |
05:12:16.21 |
+36:50:11.5 |
HIP 24398 |
21.79 |
| 2026-02-13 00:00 |
05:12:12.89 |
+36:49:29.7 |
HIP 24398 |
22.60 |
| 2026-02-13 12:00 |
05:12:09.65 |
+36:48:48.0 |
HIP 24398 |
23.41 |
| 2026-02-14 00:00 |
05:12:06.49 |
+36:48:06.2 |
HIP 24398 |
24.21 |
| 2026-02-14 12:00 |
05:12:03.41 |
+36:47:24.5 |
HIP 24398 |
25.00 |
| 2026-02-15 00:00 |
05:12:00.42 |
+36:46:42.8 |
HIP 24398 |
25.79 |
| 2026-02-15 12:00 |
05:11:57.51 |
+36:46:01.1 |
HIP 24398 |
26.57 |
| 2026-02-16 00:00 |
05:11:54.67 |
+36:45:19.5 |
HIP 24398 |
27.34 |
| 2026-02-16 12:00 |
05:11:51.92 |
+36:44:37.9 |
HIP 24029 |
27.89 |
| 2026-02-17 00:00 |
05:11:49.26 |
+36:43:56.4 |
HIP 24029 |
27.85 |
| 2026-02-17 12:00 |
05:11:46.67 |
+36:43:14.9 |
HIP 24029 |
27.85 |
| 2026-02-18 00:00 |
05:11:44.17 |
+36:42:33.4 |
HIP 24029 |
27.89 |
| 2026-02-18 12:00 |
05:11:41.75 |
+36:41:52.0 |
HIP 24029 |
27.97 |
| 2026-02-19 00:00 |
05:11:39.41 |
+36:41:10.6 |
HIP 24029 |
28.09 |
| 2026-02-19 12:00 |
05:11:37.16 |
+36:40:29.3 |
HIP 24029 |
28.24 |
| 2026-02-20 00:00 |
05:11:34.98 |
+36:39:48.1 |
HIP 24029 |
28.42 |
| 2026-02-20 12:00 |
05:11:32.89 |
+36:39:06.9 |
HIP 24029 |
28.64 |
| 2026-02-21 00:00 |
05:11:30.89 |
+36:38:25.7 |
HIP 24029 |
28.88 |
| 2026-02-21 12:00 |
05:11:28.96 |
+36:37:44.7 |
HIP 24029 |
29.16 |
| 2026-02-22 00:00 |
05:11:27.12 |
+36:37:03.7 |
HIP 24029 |
29.46 |
| 2026-02-22 12:00 |
05:11:25.36 |
+36:36:22.7 |
HIP 24029 |
29.79 |
| 2026-02-23 00:00 |
05:11:23.68 |
+36:35:41.9 |
HIP 24029 |
30.14 |
| 2026-02-23 12:00 |
05:11:22.09 |
+36:35:01.1 |
HIP 24029 |
30.52 |
| 2026-02-24 00:00 |
05:11:20.57 |
+36:34:20.4 |
HIP 24029 |
30.92 |